001 // --- BEGIN LICENSE BLOCK ---
002 /*
003 * Copyright (c) 2009, Mikio L. Braun
004 * All rights reserved.
005 *
006 * Redistribution and use in source and binary forms, with or without
007 * modification, are permitted provided that the following conditions are
008 * met:
009 *
010 * * Redistributions of source code must retain the above copyright
011 * notice, this list of conditions and the following disclaimer.
012 *
013 * * Redistributions in binary form must reproduce the above
014 * copyright notice, this list of conditions and the following
015 * disclaimer in the documentation and/or other materials provided
016 * with the distribution.
017 *
018 * * Neither the name of the Technische Universit??t Berlin nor the
019 * names of its contributors may be used to endorse or promote
020 * products derived from this software without specific prior
021 * written permission.
022 *
023 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
024 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
025 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
026 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
027 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
028 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
029 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
030 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
031 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
032 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
033 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
034 */
035 // --- END LICENSE BLOCK ---
036
037 package org.jblas;
038
039 import java.lang.Math;
040
041 /**
042 * This class provides the functions from java.lang.Math for matrices. The
043 * functions are applied to each element of the matrix.
044 *
045 * @author Mikio Braun
046 */
047 public class MatrixFunctions {
048
049 /*#
050 def mapfct(f); <<-EOS
051 for (int i = 0; i < x.length; i++)
052 x.put(i, (double) #{f}(x.get(i)));
053 return x;
054 EOS
055 end
056
057 def cmapfct(f); <<-EOS
058 for (int i = 0; i < x.length; i++)
059 x.put(i, x.get(i).#{f}());
060 return x;
061 EOS
062 end
063 #*/
064
065 /**
066 * Sets all elements in this matrix to their absolute values. Note
067 * that this operation is in-place.
068 * @see MatrixFunctions#abs(DoubleMatrix)
069 * @return this matrix
070 */
071 public static DoubleMatrix absi(DoubleMatrix x) {
072 /*# mapfct('Math.abs') #*/
073 //RJPP-BEGIN------------------------------------------------------------
074 for (int i = 0; i < x.length; i++)
075 x.put(i, (double) Math.abs(x.get(i)));
076 return x;
077 //RJPP-END--------------------------------------------------------------
078 }
079
080 public static ComplexDoubleMatrix absi(ComplexDoubleMatrix x) {
081 /*# cmapfct('abs') #*/
082 //RJPP-BEGIN------------------------------------------------------------
083 for (int i = 0; i < x.length; i++)
084 x.put(i, x.get(i).abs());
085 return x;
086 //RJPP-END--------------------------------------------------------------
087 }
088
089 /**
090 * Applies the trigonometric <i>arccosine</i> function element wise on this
091 * matrix. Note that this is an in-place operation.
092 * @see MatrixFunctions#acos(DoubleMatrix)
093 * @return this matrix
094 */
095 public static DoubleMatrix acosi(DoubleMatrix x) {
096 /*# mapfct('Math.acos') #*/
097 //RJPP-BEGIN------------------------------------------------------------
098 for (int i = 0; i < x.length; i++)
099 x.put(i, (double) Math.acos(x.get(i)));
100 return x;
101 //RJPP-END--------------------------------------------------------------
102 }
103
104 /**
105 * Applies the trigonometric <i>arcsine</i> function element wise on this
106 * matrix. Note that this is an in-place operation.
107 * @see MatrixFunctions#asin(DoubleMatrix)
108 * @return this matrix
109 */
110 public static DoubleMatrix asini(DoubleMatrix x) {
111 /*# mapfct('Math.asin') #*/
112 //RJPP-BEGIN------------------------------------------------------------
113 for (int i = 0; i < x.length; i++)
114 x.put(i, (double) Math.asin(x.get(i)));
115 return x;
116 //RJPP-END--------------------------------------------------------------
117 }
118
119 /**
120 * Applies the trigonometric <i>arctangend</i> function element wise on this
121 * matrix. Note that this is an in-place operation.
122 * @see MatrixFunctions#atan(DoubleMatrix)
123 * @return this matrix
124 */
125 public static DoubleMatrix atani(DoubleMatrix x) {
126 /*# mapfct('Math.atan') #*/
127 //RJPP-BEGIN------------------------------------------------------------
128 for (int i = 0; i < x.length; i++)
129 x.put(i, (double) Math.atan(x.get(i)));
130 return x;
131 //RJPP-END--------------------------------------------------------------
132 }
133
134 /**
135 * Applies the <i>cube root</i> function element wise on this
136 * matrix. Note that this is an in-place operation.
137 * @see MatrixFunctions#cbrt(DoubleMatrix)
138 * @return this matrix
139 */
140 public static DoubleMatrix cbrti(DoubleMatrix x) {
141 /*# mapfct('Math.cbrt') #*/
142 //RJPP-BEGIN------------------------------------------------------------
143 for (int i = 0; i < x.length; i++)
144 x.put(i, (double) Math.cbrt(x.get(i)));
145 return x;
146 //RJPP-END--------------------------------------------------------------
147 }
148
149 /**
150 * Element-wise round up by applying the <i>ceil</i> function on each
151 * element. Note that this is an in-place operation.
152 * @see MatrixFunctions#ceil(DoubleMatrix)
153 * @return this matrix
154 */
155 public static DoubleMatrix ceili(DoubleMatrix x) {
156 /*# mapfct('Math.ceil') #*/
157 //RJPP-BEGIN------------------------------------------------------------
158 for (int i = 0; i < x.length; i++)
159 x.put(i, (double) Math.ceil(x.get(i)));
160 return x;
161 //RJPP-END--------------------------------------------------------------
162 }
163
164 /**
165 * Applies the <i>cosine</i> function element-wise on this
166 * matrix. Note that this is an in-place operation.
167 * @see MatrixFunctions#cos(DoubleMatrix)
168 * @return this matrix
169 */
170 public static DoubleMatrix cosi(DoubleMatrix x) {
171 /*# mapfct('Math.cos') #*/
172 //RJPP-BEGIN------------------------------------------------------------
173 for (int i = 0; i < x.length; i++)
174 x.put(i, (double) Math.cos(x.get(i)));
175 return x;
176 //RJPP-END--------------------------------------------------------------
177 }
178
179 /**
180 * Applies the <i>hyperbolic cosine</i> function element-wise on this
181 * matrix. Note that this is an in-place operation.
182 * @see MatrixFunctions#cosh(DoubleMatrix)
183 * @return this matrix
184 */
185 public static DoubleMatrix coshi(DoubleMatrix x) {
186 /*# mapfct('Math.cosh') #*/
187 //RJPP-BEGIN------------------------------------------------------------
188 for (int i = 0; i < x.length; i++)
189 x.put(i, (double) Math.cosh(x.get(i)));
190 return x;
191 //RJPP-END--------------------------------------------------------------
192 }
193
194 /**
195 * Applies the <i>exponential</i> function element-wise on this
196 * matrix. Note that this is an in-place operation.
197 * @see MatrixFunctions#exp(DoubleMatrix)
198 * @return this matrix
199 */
200 public static DoubleMatrix expi(DoubleMatrix x) {
201 /*# mapfct('Math.exp') #*/
202 //RJPP-BEGIN------------------------------------------------------------
203 for (int i = 0; i < x.length; i++)
204 x.put(i, (double) Math.exp(x.get(i)));
205 return x;
206 //RJPP-END--------------------------------------------------------------
207 }
208
209 /**
210 * Element-wise round down by applying the <i>floor</i> function on each
211 * element. Note that this is an in-place operation.
212 * @see MatrixFunctions#floor(DoubleMatrix)
213 * @return this matrix
214 */
215 public static DoubleMatrix floori(DoubleMatrix x) {
216 /*# mapfct('Math.floor') #*/
217 //RJPP-BEGIN------------------------------------------------------------
218 for (int i = 0; i < x.length; i++)
219 x.put(i, (double) Math.floor(x.get(i)));
220 return x;
221 //RJPP-END--------------------------------------------------------------
222 }
223
224 /**
225 * Applies the <i>natural logarithm</i> function element-wise on this
226 * matrix. Note that this is an in-place operation.
227 * @see MatrixFunctions#log(DoubleMatrix)
228 * @return this matrix
229 */
230 public static DoubleMatrix logi(DoubleMatrix x) {
231 /*# mapfct('Math.log') #*/
232 //RJPP-BEGIN------------------------------------------------------------
233 for (int i = 0; i < x.length; i++)
234 x.put(i, (double) Math.log(x.get(i)));
235 return x;
236 //RJPP-END--------------------------------------------------------------
237 }
238
239 /**
240 * Applies the <i>logarithm with basis to 10</i> element-wise on this
241 * matrix. Note that this is an in-place operation.
242 * @see MatrixFunctions#log10(DoubleMatrix)
243 * @return this matrix
244 */
245 public static DoubleMatrix log10i(DoubleMatrix x) {
246 /*# mapfct('Math.log10') #*/
247 //RJPP-BEGIN------------------------------------------------------------
248 for (int i = 0; i < x.length; i++)
249 x.put(i, (double) Math.log10(x.get(i)));
250 return x;
251 //RJPP-END--------------------------------------------------------------
252 }
253
254 /**
255 * Element-wise power function. Replaces each element with its
256 * power of <tt>d</tt>.Note that this is an in-place operation.
257 * @param d the exponent
258 * @see MatrixFunctions#pow(DoubleMatrix,double)
259 * @return this matrix
260 */
261 public static DoubleMatrix powi(DoubleMatrix x, double d) {
262 if (d == 2.0)
263 return x.muli(x);
264 else {
265 for (int i = 0; i < x.length; i++)
266 x.put(i, (double) Math.pow(x.get(i), d));
267 return x;
268 }
269 }
270
271 public static DoubleMatrix powi(double base, DoubleMatrix x) {
272 for (int i = 0; i < x.length; i++)
273 x.put(i, (double) Math.pow(base, x.get(i)));
274 return x;
275 }
276
277 public static DoubleMatrix powi(DoubleMatrix x, DoubleMatrix e) {
278 x.checkLength(e.length);
279 for (int i = 0; i < x.length; i++)
280 x.put(i, (double) Math.pow(x.get(i), e.get(i)));
281 return x;
282 }
283
284 public static DoubleMatrix signumi(DoubleMatrix x) {
285 /*# mapfct('Math.signum') #*/
286 //RJPP-BEGIN------------------------------------------------------------
287 for (int i = 0; i < x.length; i++)
288 x.put(i, (double) Math.signum(x.get(i)));
289 return x;
290 //RJPP-END--------------------------------------------------------------
291 }
292
293 public static DoubleMatrix sini(DoubleMatrix x) {
294 /*# mapfct('Math.sin') #*/
295 //RJPP-BEGIN------------------------------------------------------------
296 for (int i = 0; i < x.length; i++)
297 x.put(i, (double) Math.sin(x.get(i)));
298 return x;
299 //RJPP-END--------------------------------------------------------------
300 }
301
302 public static DoubleMatrix sinhi(DoubleMatrix x) {
303 /*# mapfct('Math.sinh') #*/
304 //RJPP-BEGIN------------------------------------------------------------
305 for (int i = 0; i < x.length; i++)
306 x.put(i, (double) Math.sinh(x.get(i)));
307 return x;
308 //RJPP-END--------------------------------------------------------------
309 }
310 public static DoubleMatrix sqrti(DoubleMatrix x) {
311 /*# mapfct('Math.sqrt') #*/
312 //RJPP-BEGIN------------------------------------------------------------
313 for (int i = 0; i < x.length; i++)
314 x.put(i, (double) Math.sqrt(x.get(i)));
315 return x;
316 //RJPP-END--------------------------------------------------------------
317 }
318 public static DoubleMatrix tani(DoubleMatrix x) {
319 /*# mapfct('Math.tan') #*/
320 //RJPP-BEGIN------------------------------------------------------------
321 for (int i = 0; i < x.length; i++)
322 x.put(i, (double) Math.tan(x.get(i)));
323 return x;
324 //RJPP-END--------------------------------------------------------------
325 }
326 public static DoubleMatrix tanhi(DoubleMatrix x) {
327 /*# mapfct('Math.tanh') #*/
328 //RJPP-BEGIN------------------------------------------------------------
329 for (int i = 0; i < x.length; i++)
330 x.put(i, (double) Math.tanh(x.get(i)));
331 return x;
332 //RJPP-END--------------------------------------------------------------
333 }
334
335 /**
336 * Returns a copy of this matrix where all elements are set to their
337 * absolute values.
338 * @see MatrixFunctions#absi(DoubleMatrix)
339 * @return copy of this matrix
340 */
341 public static DoubleMatrix abs(DoubleMatrix x) { return absi(x.dup()); }
342
343 /**
344 * Returns a copy of this matrix where the trigonometric <i>acos</i> function is applied
345 * element wise.
346 * @see MatrixFunctions#acosi(DoubleMatrix)
347 * @return copy of this matrix
348 */
349 public static DoubleMatrix acos(DoubleMatrix x) { return acosi(x.dup()); }
350 public static DoubleMatrix asin(DoubleMatrix x) { return asini(x.dup()); }
351 public static DoubleMatrix atan(DoubleMatrix x) { return atani(x.dup()); }
352 public static DoubleMatrix cbrt(DoubleMatrix x) { return cbrti(x.dup()); }
353 public static DoubleMatrix ceil(DoubleMatrix x) { return ceili(x.dup()); }
354 public static DoubleMatrix cos(DoubleMatrix x) { return cosi(x.dup()); }
355 public static DoubleMatrix cosh(DoubleMatrix x) { return coshi(x.dup()); }
356 public static DoubleMatrix exp(DoubleMatrix x) { return expi(x.dup()); }
357 public static DoubleMatrix floor(DoubleMatrix x) { return floori(x.dup()); }
358 public static DoubleMatrix log(DoubleMatrix x) { return logi(x.dup()); }
359 public static DoubleMatrix log10(DoubleMatrix x) { return log10i(x.dup()); }
360 public static double pow(double x, double y) { return (double)Math.pow(x, y); }
361 public static DoubleMatrix pow(DoubleMatrix x, double e) { return powi(x.dup(), e); }
362 public static DoubleMatrix pow(double b, DoubleMatrix x) { return powi(b, x.dup()); }
363 public static DoubleMatrix pow(DoubleMatrix x, DoubleMatrix e) { return powi(x.dup(), e); }
364 public static DoubleMatrix signum(DoubleMatrix x) { return signumi(x.dup()); }
365 public static DoubleMatrix sin(DoubleMatrix x) { return sini(x.dup()); }
366 public static DoubleMatrix sinh(DoubleMatrix x) { return sinhi(x.dup()); }
367 public static DoubleMatrix sqrt(DoubleMatrix x) { return sqrti(x.dup()); }
368 public static DoubleMatrix tan(DoubleMatrix x) { return tani(x.dup()); }
369 public static DoubleMatrix tanh(DoubleMatrix x) { return tanhi(x.dup()); }
370
371 /*# %w{abs acos asin atan cbrt ceil cos cosh exp floor log log10 signum sin sinh sqrt tan tanh}.map do |fct| <<-EOS
372 public static double #{fct}(double x) { return (double)Math.#{fct}(x); }
373 EOS
374 end
375 #*/
376 //RJPP-BEGIN------------------------------------------------------------
377 public static double abs(double x) { return (double)Math.abs(x); }
378 public static double acos(double x) { return (double)Math.acos(x); }
379 public static double asin(double x) { return (double)Math.asin(x); }
380 public static double atan(double x) { return (double)Math.atan(x); }
381 public static double cbrt(double x) { return (double)Math.cbrt(x); }
382 public static double ceil(double x) { return (double)Math.ceil(x); }
383 public static double cos(double x) { return (double)Math.cos(x); }
384 public static double cosh(double x) { return (double)Math.cosh(x); }
385 public static double exp(double x) { return (double)Math.exp(x); }
386 public static double floor(double x) { return (double)Math.floor(x); }
387 public static double log(double x) { return (double)Math.log(x); }
388 public static double log10(double x) { return (double)Math.log10(x); }
389 public static double signum(double x) { return (double)Math.signum(x); }
390 public static double sin(double x) { return (double)Math.sin(x); }
391 public static double sinh(double x) { return (double)Math.sinh(x); }
392 public static double sqrt(double x) { return (double)Math.sqrt(x); }
393 public static double tan(double x) { return (double)Math.tan(x); }
394 public static double tanh(double x) { return (double)Math.tanh(x); }
395 //RJPP-END--------------------------------------------------------------
396
397 //STOP
398 public static DoubleMatrix floatToDouble(FloatMatrix fm) {
399 DoubleMatrix dm = new DoubleMatrix(fm.rows, fm.columns);
400
401 for (int i = 0; i < fm.length; i++)
402 dm.put(i, (double) fm.get(i));
403
404 return dm;
405 }
406
407 public static FloatMatrix doubleToFloat(DoubleMatrix dm) {
408 FloatMatrix fm = new FloatMatrix(dm.rows, dm.columns);
409
410 for (int i = 0; i < dm.length; i++)
411 fm.put(i, (float) dm.get(i));
412
413 return fm;
414 }
415 //START
416
417 //BEGIN
418 // The code below has been automatically generated.
419 // DO NOT EDIT!
420
421 /*#
422 def mapfct(f); <<-EOS
423 for (int i = 0; i < x.length; i++)
424 x.put(i, (float) #{f}(x.get(i)));
425 return x;
426 EOS
427 end
428
429 def cmapfct(f); <<-EOS
430 for (int i = 0; i < x.length; i++)
431 x.put(i, x.get(i).#{f}());
432 return x;
433 EOS
434 end
435 #*/
436
437 /**
438 * Sets all elements in this matrix to their absolute values. Note
439 * that this operation is in-place.
440 * @see MatrixFunctions#abs(FloatMatrix)
441 * @return this matrix
442 */
443 public static FloatMatrix absi(FloatMatrix x) {
444 /*# mapfct('Math.abs') #*/
445 //RJPP-BEGIN------------------------------------------------------------
446 for (int i = 0; i < x.length; i++)
447 x.put(i, (float) Math.abs(x.get(i)));
448 return x;
449 //RJPP-END--------------------------------------------------------------
450 }
451
452 public static ComplexFloatMatrix absi(ComplexFloatMatrix x) {
453 /*# cmapfct('abs') #*/
454 //RJPP-BEGIN------------------------------------------------------------
455 for (int i = 0; i < x.length; i++)
456 x.put(i, x.get(i).abs());
457 return x;
458 //RJPP-END--------------------------------------------------------------
459 }
460
461 /**
462 * Applies the trigonometric <i>arccosine</i> function element wise on this
463 * matrix. Note that this is an in-place operation.
464 * @see MatrixFunctions#acos(FloatMatrix)
465 * @return this matrix
466 */
467 public static FloatMatrix acosi(FloatMatrix x) {
468 /*# mapfct('Math.acos') #*/
469 //RJPP-BEGIN------------------------------------------------------------
470 for (int i = 0; i < x.length; i++)
471 x.put(i, (float) Math.acos(x.get(i)));
472 return x;
473 //RJPP-END--------------------------------------------------------------
474 }
475
476 /**
477 * Applies the trigonometric <i>arcsine</i> function element wise on this
478 * matrix. Note that this is an in-place operation.
479 * @see MatrixFunctions#asin(FloatMatrix)
480 * @return this matrix
481 */
482 public static FloatMatrix asini(FloatMatrix x) {
483 /*# mapfct('Math.asin') #*/
484 //RJPP-BEGIN------------------------------------------------------------
485 for (int i = 0; i < x.length; i++)
486 x.put(i, (float) Math.asin(x.get(i)));
487 return x;
488 //RJPP-END--------------------------------------------------------------
489 }
490
491 /**
492 * Applies the trigonometric <i>arctangend</i> function element wise on this
493 * matrix. Note that this is an in-place operation.
494 * @see MatrixFunctions#atan(FloatMatrix)
495 * @return this matrix
496 */
497 public static FloatMatrix atani(FloatMatrix x) {
498 /*# mapfct('Math.atan') #*/
499 //RJPP-BEGIN------------------------------------------------------------
500 for (int i = 0; i < x.length; i++)
501 x.put(i, (float) Math.atan(x.get(i)));
502 return x;
503 //RJPP-END--------------------------------------------------------------
504 }
505
506 /**
507 * Applies the <i>cube root</i> function element wise on this
508 * matrix. Note that this is an in-place operation.
509 * @see MatrixFunctions#cbrt(FloatMatrix)
510 * @return this matrix
511 */
512 public static FloatMatrix cbrti(FloatMatrix x) {
513 /*# mapfct('Math.cbrt') #*/
514 //RJPP-BEGIN------------------------------------------------------------
515 for (int i = 0; i < x.length; i++)
516 x.put(i, (float) Math.cbrt(x.get(i)));
517 return x;
518 //RJPP-END--------------------------------------------------------------
519 }
520
521 /**
522 * Element-wise round up by applying the <i>ceil</i> function on each
523 * element. Note that this is an in-place operation.
524 * @see MatrixFunctions#ceil(FloatMatrix)
525 * @return this matrix
526 */
527 public static FloatMatrix ceili(FloatMatrix x) {
528 /*# mapfct('Math.ceil') #*/
529 //RJPP-BEGIN------------------------------------------------------------
530 for (int i = 0; i < x.length; i++)
531 x.put(i, (float) Math.ceil(x.get(i)));
532 return x;
533 //RJPP-END--------------------------------------------------------------
534 }
535
536 /**
537 * Applies the <i>cosine</i> function element-wise on this
538 * matrix. Note that this is an in-place operation.
539 * @see MatrixFunctions#cos(FloatMatrix)
540 * @return this matrix
541 */
542 public static FloatMatrix cosi(FloatMatrix x) {
543 /*# mapfct('Math.cos') #*/
544 //RJPP-BEGIN------------------------------------------------------------
545 for (int i = 0; i < x.length; i++)
546 x.put(i, (float) Math.cos(x.get(i)));
547 return x;
548 //RJPP-END--------------------------------------------------------------
549 }
550
551 /**
552 * Applies the <i>hyperbolic cosine</i> function element-wise on this
553 * matrix. Note that this is an in-place operation.
554 * @see MatrixFunctions#cosh(FloatMatrix)
555 * @return this matrix
556 */
557 public static FloatMatrix coshi(FloatMatrix x) {
558 /*# mapfct('Math.cosh') #*/
559 //RJPP-BEGIN------------------------------------------------------------
560 for (int i = 0; i < x.length; i++)
561 x.put(i, (float) Math.cosh(x.get(i)));
562 return x;
563 //RJPP-END--------------------------------------------------------------
564 }
565
566 /**
567 * Applies the <i>exponential</i> function element-wise on this
568 * matrix. Note that this is an in-place operation.
569 * @see MatrixFunctions#exp(FloatMatrix)
570 * @return this matrix
571 */
572 public static FloatMatrix expi(FloatMatrix x) {
573 /*# mapfct('Math.exp') #*/
574 //RJPP-BEGIN------------------------------------------------------------
575 for (int i = 0; i < x.length; i++)
576 x.put(i, (float) Math.exp(x.get(i)));
577 return x;
578 //RJPP-END--------------------------------------------------------------
579 }
580
581 /**
582 * Element-wise round down by applying the <i>floor</i> function on each
583 * element. Note that this is an in-place operation.
584 * @see MatrixFunctions#floor(FloatMatrix)
585 * @return this matrix
586 */
587 public static FloatMatrix floori(FloatMatrix x) {
588 /*# mapfct('Math.floor') #*/
589 //RJPP-BEGIN------------------------------------------------------------
590 for (int i = 0; i < x.length; i++)
591 x.put(i, (float) Math.floor(x.get(i)));
592 return x;
593 //RJPP-END--------------------------------------------------------------
594 }
595
596 /**
597 * Applies the <i>natural logarithm</i> function element-wise on this
598 * matrix. Note that this is an in-place operation.
599 * @see MatrixFunctions#log(FloatMatrix)
600 * @return this matrix
601 */
602 public static FloatMatrix logi(FloatMatrix x) {
603 /*# mapfct('Math.log') #*/
604 //RJPP-BEGIN------------------------------------------------------------
605 for (int i = 0; i < x.length; i++)
606 x.put(i, (float) Math.log(x.get(i)));
607 return x;
608 //RJPP-END--------------------------------------------------------------
609 }
610
611 /**
612 * Applies the <i>logarithm with basis to 10</i> element-wise on this
613 * matrix. Note that this is an in-place operation.
614 * @see MatrixFunctions#log10(FloatMatrix)
615 * @return this matrix
616 */
617 public static FloatMatrix log10i(FloatMatrix x) {
618 /*# mapfct('Math.log10') #*/
619 //RJPP-BEGIN------------------------------------------------------------
620 for (int i = 0; i < x.length; i++)
621 x.put(i, (float) Math.log10(x.get(i)));
622 return x;
623 //RJPP-END--------------------------------------------------------------
624 }
625
626 /**
627 * Element-wise power function. Replaces each element with its
628 * power of <tt>d</tt>.Note that this is an in-place operation.
629 * @param d the exponent
630 * @see MatrixFunctions#pow(FloatMatrix,float)
631 * @return this matrix
632 */
633 public static FloatMatrix powi(FloatMatrix x, float d) {
634 if (d == 2.0f)
635 return x.muli(x);
636 else {
637 for (int i = 0; i < x.length; i++)
638 x.put(i, (float) Math.pow(x.get(i), d));
639 return x;
640 }
641 }
642
643 public static FloatMatrix powi(float base, FloatMatrix x) {
644 for (int i = 0; i < x.length; i++)
645 x.put(i, (float) Math.pow(base, x.get(i)));
646 return x;
647 }
648
649 public static FloatMatrix powi(FloatMatrix x, FloatMatrix e) {
650 x.checkLength(e.length);
651 for (int i = 0; i < x.length; i++)
652 x.put(i, (float) Math.pow(x.get(i), e.get(i)));
653 return x;
654 }
655
656 public static FloatMatrix signumi(FloatMatrix x) {
657 /*# mapfct('Math.signum') #*/
658 //RJPP-BEGIN------------------------------------------------------------
659 for (int i = 0; i < x.length; i++)
660 x.put(i, (float) Math.signum(x.get(i)));
661 return x;
662 //RJPP-END--------------------------------------------------------------
663 }
664
665 public static FloatMatrix sini(FloatMatrix x) {
666 /*# mapfct('Math.sin') #*/
667 //RJPP-BEGIN------------------------------------------------------------
668 for (int i = 0; i < x.length; i++)
669 x.put(i, (float) Math.sin(x.get(i)));
670 return x;
671 //RJPP-END--------------------------------------------------------------
672 }
673
674 public static FloatMatrix sinhi(FloatMatrix x) {
675 /*# mapfct('Math.sinh') #*/
676 //RJPP-BEGIN------------------------------------------------------------
677 for (int i = 0; i < x.length; i++)
678 x.put(i, (float) Math.sinh(x.get(i)));
679 return x;
680 //RJPP-END--------------------------------------------------------------
681 }
682 public static FloatMatrix sqrti(FloatMatrix x) {
683 /*# mapfct('Math.sqrt') #*/
684 //RJPP-BEGIN------------------------------------------------------------
685 for (int i = 0; i < x.length; i++)
686 x.put(i, (float) Math.sqrt(x.get(i)));
687 return x;
688 //RJPP-END--------------------------------------------------------------
689 }
690 public static FloatMatrix tani(FloatMatrix x) {
691 /*# mapfct('Math.tan') #*/
692 //RJPP-BEGIN------------------------------------------------------------
693 for (int i = 0; i < x.length; i++)
694 x.put(i, (float) Math.tan(x.get(i)));
695 return x;
696 //RJPP-END--------------------------------------------------------------
697 }
698 public static FloatMatrix tanhi(FloatMatrix x) {
699 /*# mapfct('Math.tanh') #*/
700 //RJPP-BEGIN------------------------------------------------------------
701 for (int i = 0; i < x.length; i++)
702 x.put(i, (float) Math.tanh(x.get(i)));
703 return x;
704 //RJPP-END--------------------------------------------------------------
705 }
706
707 /**
708 * Returns a copy of this matrix where all elements are set to their
709 * absolute values.
710 * @see MatrixFunctions#absi(FloatMatrix)
711 * @return copy of this matrix
712 */
713 public static FloatMatrix abs(FloatMatrix x) { return absi(x.dup()); }
714
715 /**
716 * Returns a copy of this matrix where the trigonometric <i>acos</i> function is applied
717 * element wise.
718 * @see MatrixFunctions#acosi(FloatMatrix)
719 * @return copy of this matrix
720 */
721 public static FloatMatrix acos(FloatMatrix x) { return acosi(x.dup()); }
722 public static FloatMatrix asin(FloatMatrix x) { return asini(x.dup()); }
723 public static FloatMatrix atan(FloatMatrix x) { return atani(x.dup()); }
724 public static FloatMatrix cbrt(FloatMatrix x) { return cbrti(x.dup()); }
725 public static FloatMatrix ceil(FloatMatrix x) { return ceili(x.dup()); }
726 public static FloatMatrix cos(FloatMatrix x) { return cosi(x.dup()); }
727 public static FloatMatrix cosh(FloatMatrix x) { return coshi(x.dup()); }
728 public static FloatMatrix exp(FloatMatrix x) { return expi(x.dup()); }
729 public static FloatMatrix floor(FloatMatrix x) { return floori(x.dup()); }
730 public static FloatMatrix log(FloatMatrix x) { return logi(x.dup()); }
731 public static FloatMatrix log10(FloatMatrix x) { return log10i(x.dup()); }
732 public static float pow(float x, float y) { return (float)Math.pow(x, y); }
733 public static FloatMatrix pow(FloatMatrix x, float e) { return powi(x.dup(), e); }
734 public static FloatMatrix pow(float b, FloatMatrix x) { return powi(b, x.dup()); }
735 public static FloatMatrix pow(FloatMatrix x, FloatMatrix e) { return powi(x.dup(), e); }
736 public static FloatMatrix signum(FloatMatrix x) { return signumi(x.dup()); }
737 public static FloatMatrix sin(FloatMatrix x) { return sini(x.dup()); }
738 public static FloatMatrix sinh(FloatMatrix x) { return sinhi(x.dup()); }
739 public static FloatMatrix sqrt(FloatMatrix x) { return sqrti(x.dup()); }
740 public static FloatMatrix tan(FloatMatrix x) { return tani(x.dup()); }
741 public static FloatMatrix tanh(FloatMatrix x) { return tanhi(x.dup()); }
742
743 /*# %w{abs acos asin atan cbrt ceil cos cosh exp floor log log10 signum sin sinh sqrt tan tanh}.map do |fct| <<-EOS
744 public static float #{fct}(float x) { return (float)Math.#{fct}(x); }
745 EOS
746 end
747 #*/
748 //RJPP-BEGIN------------------------------------------------------------
749 public static float abs(float x) { return (float)Math.abs(x); }
750 public static float acos(float x) { return (float)Math.acos(x); }
751 public static float asin(float x) { return (float)Math.asin(x); }
752 public static float atan(float x) { return (float)Math.atan(x); }
753 public static float cbrt(float x) { return (float)Math.cbrt(x); }
754 public static float ceil(float x) { return (float)Math.ceil(x); }
755 public static float cos(float x) { return (float)Math.cos(x); }
756 public static float cosh(float x) { return (float)Math.cosh(x); }
757 public static float exp(float x) { return (float)Math.exp(x); }
758 public static float floor(float x) { return (float)Math.floor(x); }
759 public static float log(float x) { return (float)Math.log(x); }
760 public static float log10(float x) { return (float)Math.log10(x); }
761 public static float signum(float x) { return (float)Math.signum(x); }
762 public static float sin(float x) { return (float)Math.sin(x); }
763 public static float sinh(float x) { return (float)Math.sinh(x); }
764 public static float sqrt(float x) { return (float)Math.sqrt(x); }
765 public static float tan(float x) { return (float)Math.tan(x); }
766 public static float tanh(float x) { return (float)Math.tanh(x); }
767 //RJPP-END--------------------------------------------------------------
768
769
770 //END
771 }