复制代码
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783>> %MATLAB基本使用方法 >> %常见操作命令和快捷键 >> %clc清空命令窗口 >> %clear清除工作区中的变量 >> %clf清除图形窗口 >> x=-2*pi:0.05:2*pi; >> y=3*sin(x)-2*cos(x); >> plot(x,y) >> clf >> %disp显示变量 >> disp('极限是:') 极限是: >> disp(x) 1 至 9 列 -6.2832 -6.2332 -6.1832 -6.1332 -6.0832 -6.0332 -5.9832 -5.9332 -5.8832 10 至 18 列 -5.8332 -5.7832 -5.7332 -5.6832 -5.6332 -5.5832 -5.5332 -5.4832 -5.4332 19 至 27 列 -5.3832 -5.3332 -5.2832 -5.2332 -5.1832 -5.1332 -5.0832 -5.0332 -4.9832 28 至 36 列 -4.9332 -4.8832 -4.8332 -4.7832 -4.7332 -4.6832 -4.6332 -4.5832 -4.5332 37 至 45 列 -4.4832 -4.4332 -4.3832 -4.3332 -4.2832 -4.2332 -4.1832 -4.1332 -4.0832 46 至 54 列 -4.0332 -3.9832 -3.9332 -3.8832 -3.8332 -3.7832 -3.7332 -3.6832 -3.6332 55 至 63 列 -3.5832 -3.5332 -3.4832 -3.4332 -3.3832 -3.3332 -3.2832 -3.2332 -3.1832 64 至 72 列 -3.1332 -3.0832 -3.0332 -2.9832 -2.9332 -2.8832 -2.8332 -2.7832 -2.7332 73 至 81 列 -2.6832 -2.6332 -2.5832 -2.5332 -2.4832 -2.4332 -2.3832 -2.3332 -2.2832 82 至 90 列 -2.2332 -2.1832 -2.1332 -2.0832 -2.0332 -1.9832 -1.9332 -1.8832 -1.8332 91 至 99 列 -1.7832 -1.7332 -1.6832 -1.6332 -1.5832 -1.5332 -1.4832 -1.4332 -1.3832 100 至 108 列 -1.3332 -1.2832 -1.2332 -1.1832 -1.1332 -1.0832 -1.0332 -0.9832 -0.9332 109 至 117 列 -0.8832 -0.8332 -0.7832 -0.7332 -0.6832 -0.6332 -0.5832 -0.5332 -0.4832 118 至 126 列 -0.4332 -0.3832 -0.3332 -0.2832 -0.2332 -0.1832 -0.1332 -0.0832 -0.0332 127 至 135 列 0.0168 0.0668 0.1168 0.1668 0.2168 0.2668 0.3168 0.3668 0.4168 136 至 144 列 0.4668 0.5168 0.5668 0.6168 0.6668 0.7168 0.7668 0.8168 0.8668 145 至 153 列 0.9168 0.9668 1.0168 1.0668 1.1168 1.1668 1.2168 1.2668 1.3168 154 至 162 列 1.3668 1.4168 1.4668 1.5168 1.5668 1.6168 1.6668 1.7168 1.7668 163 至 171 列 1.8168 1.8668 1.9168 1.9668 2.0168 2.0668 2.1168 2.1668 2.2168 172 至 180 列 2.2668 2.3168 2.3668 2.4168 2.4668 2.5168 2.5668 2.6168 2.6668 181 至 189 列 2.7168 2.7668 2.8168 2.8668 2.9168 2.9668 3.0168 3.0668 3.1168 190 至 198 列 3.1668 3.2168 3.2668 3.3168 3.3668 3.4168 3.4668 3.5168 3.5668 199 至 207 列 3.6168 3.6668 3.7168 3.7668 3.8168 3.8668 3.9168 3.9668 4.0168 208 至 216 列 4.0668 4.1168 4.1668 4.2168 4.2668 4.3168 4.3668 4.4168 4.4668 217 至 225 列 4.5168 4.5668 4.6168 4.6668 4.7168 4.7668 4.8168 4.8668 4.9168 226 至 234 列 4.9668 5.0168 5.0668 5.1168 5.1668 5.2168 5.2668 5.3168 5.3668 235 至 243 列 5.4168 5.4668 5.5168 5.5668 5.6168 5.6668 5.7168 5.7668 5.8168 244 至 252 列 5.8668 5.9168 5.9668 6.0168 6.0668 6.1168 6.1668 6.2168 6.2668 >> %hold 图形保持命令 >> %当关掉MATLAB时，定义的变量会被清除 >> %save 保持内存变量 >> bengS >> save('bengS.mat') >> %这时在文件夹会产生一个变量文件bengS.mat >> %load 加载指定文件中的变量 >> load('bengS.mat') >> %快捷键 >> %Ctrl+p >> %Ctrl+p调用上一行 >> %Ctrl+f调用下一行 >> %MATLAB默认的数据类型是双精度型 >> x=5.7 x = 5.7000 >> %整数数据类型:有符号整数(int8,int16,int32,int64),无符号整数(uint8,uint16,uint32,uint64) >> a=uint8(56) a = 56 >> a=uint8(560) a = 255 >> %8位最大也就是2^8-1=255 >> a=uint16(560) a = 560 >> b=int8(-560) b = -128 >> %参见C语言中截断 >> b=int16(-560) b = -560 >> b=uint16(-560) b = 0 >>%类型不匹配，输出错误 >> A=uint16(magic(6)) A = 35 1 6 26 19 24 3 32 7 21 23 25 31 9 2 22 27 20 8 28 33 17 10 15 30 5 34 12 14 16 4 36 29 13 18 11 >> %浮点数；单精度浮点数(single)、双精度浮点数(double) >> B=single(magic(6)) B = 35 1 6 26 19 24 3 32 7 21 23 25 31 9 2 22 27 20 8 28 33 17 10 15 30 5 34 12 14 16 4 36 29 13 18 11 >> %复数 >> sqrt(-1) ans = 0.0000 + 1.0000i >> x=5+6i x = 5.0000 + 6.0000i >> y=complex(0,1) y = 0.0000 + 1.0000i >> xr=real(x) xr = 5 >> xi=imag(x) xi = 6 >> xabs=abs(x) xabs = 7.8102 >> sqrt(25+36) ans = 7.8102 >> %幅角 >> xa=angle(x) xa = 0.8761 >> %弧度-->角度 >> 180/pi*xa ans = 50.1944 >> %角度 >> conj(x) ans = 5.0000 - 6.0000i >> xc=conj(x) xc = 5.0000 - 6.0000i >> x = 0:0.01:2*pi; >> y=x+i*x*sin(x); 错误使用 * 内部矩阵维度必须一致。 >> a=[1,2,3]; >> b=[4,5,6]; >> c=a*b 错误使用 * 内部矩阵维度必须一致。 >> c=a.*b c = 4 10 18 >> %点乘.* >> y=x+i*x.*sin(x) y = 1 至 11 列 0 0.0122 0.0288 0.0498 0.0752 0.1050 0.1392 0.1777 0.2206 0.2680 0.3196 12 至 22 列 0.3757 0.4360 0.5008 0.5698 0.6431 0.7208 0.8027 0.8890 0.9794 1.0741 1.1731 23 至 33 列 1.2762 1.3836 1.4951 1.6107 1.7305 1.8544 1.9824 2.1144 2.2504 2.3905 2.5345 34 至 44 列 2.6826 2.8345 2.9903 3.1500 3.3135 3.4809 3.6520 3.8269 4.0055 4.1877 4.3736 45 至 55 列 4.5631 4.7562 4.9528 5.1528 5.3564 5.5633 5.7737 5.9873 6.2043 6.4245 6.6479 56 至 66 列 6.8745 7.1042 7.3370 7.5728 7.8116 8.0533 8.2979 8.5453 8.7955 9.0485 9.3042 67 至 77 列 9.5625 9.8233 10.0867 10.3526 10.6210 10.8916 11.1647 11.4399 11.7174 11.9970 12.2788 78 至 88 列 12.5625 12.8483 13.1359 13.4255 13.7168 14.0099 14.3046 14.6010 14.8989 15.1984 15.4993 89 至 99 列 15.8015 16.1051 16.4099 16.7159 17.0230 17.3311 17.6403 17.9504 18.2613 18.5731 18.8855 100 至 110 列 19.1986 19.5124 19.8266 20.1413 20.4564 20.7718 21.0875 21.4033 21.7193 22.0353 22.3513 111 至 121 列 22.6672 22.9830 23.2985 23.6137 23.9285 24.2429 24.5568 24.8701 25.1828 25.4947 25.8058 122 至 132 列 26.1161 26.4254 26.7337 27.0410 27.3471 27.6519 27.9555 28.2577 28.5585 28.8578 29.1555 133 至 143 列 29.4515 29.7458 30.0383 30.3290 30.6177 30.9044 31.1891 31.4716 31.7519 32.0298 32.3055 144 至 154 列 32.5787 32.8494 33.1175 33.3831 33.6459 33.9059 34.1631 34.4173 34.6686 34.9169 35.1620 155 至 165 列 35.4039 35.6426 35.8780 36.1100 36.3385 36.5636 36.7850 37.0028 37.2169 37.4272 37.6336 166 至 176 列 37.8362 38.0348 38.2294 38.4198 38.6062 38.7883 38.9661 39.1396 39.3087 39.4733 39.6335 177 至 187 列 39.7890 39.9399 40.0862 40.2277 40.3644 40.4962 40.6231 40.7451 40.8620 40.9739 41.0806 188 至 198 列 41.1822 41.2786 41.3696 41.4553 41.5357 41.6106 41.6801 41.7440 41.8024 41.8551 41.9022 199 至 209 列 41.9436 41.9792 42.0091 42.0331 42.0512 42.0635 42.0698 42.0700 42.0643 42.0525 42.0346 210 至 220 列 42.0105 41.9803 41.9438 41.9011 41.8522 41.7969 41.7353 41.6673 41.5930 41.5122 41.4249 221 至 231 列 41.3312 41.2310 41.1243 41.0110 40.8911 40.7646 40.6315 40.4918 40.3455 40.1924 40.0327 232 至 242 列 39.8662 39.6931 39.5132 39.3266 39.1332 38.9330 38.7261 38.5123 38.2918 38.0645 37.8303 243 至 253 列 37.5893 37.3416 37.0870 36.8255 36.5573 36.2822 36.0003 35.7115 35.4160 35.1136 34.8044 254 至 264 列 34.4884 34.1656 33.8361 33.4997 33.1566 32.8067 32.4500 32.0867 31.7166 31.3398 30.9563 265 至 275 列 30.5662 30.1694 29.7660 29.3559 28.9393 28.5161 28.0864 27.6501 27.2074 26.7582 26.3025 276 至 286 列 25.8405 25.3721 24.8973 24.4162 23.9289 23.4353 22.9355 22.4295 21.9174 21.3991 20.8749 287 至 297 列 20.3446 19.8083 19.2661 18.7180 18.1641 17.6044 17.0389 16.4677 15.8909 15.3084 14.7204 298 至 308 列 14.1269 13.5280 12.9236 12.3139 11.6989 11.0787 10.4533 9.8228 9.1873 8.5467 7.9012 309 至 319 列 7.2509 6.5957 5.9358 5.2712 4.6020 3.9283 3.2500 2.5674 1.8804 1.1891 0.4937 320 至 330 列 -0.2059 -0.9095 -1.6172 -2.3287 -3.0440 -3.7632 -4.4860 -5.2123 -5.9423 -6.6756 -7.4123 331 至 341 列 -8.1523 -8.8955 -9.6419 -10.3912 -11.1435 -11.8987 -12.6566 -13.4173 -14.1805 -14.9463 -15.7145 342 至 352 列 -16.4850 -17.2578 -18.0328 -18.8098 -19.5888 -20.3697 -21.1524 -21.9368 -22.7228 -23.5103 -24.2992 353 至 363 列 -25.0895 -25.8810 -26.6736 -27.4673 -28.2619 -29.0573 -29.8535 -30.6503 -31.4476 -32.2454 -33.0435 364 至 374 列 -33.8419 -34.6404 -35.4390 -36.2374 -37.0358 -37.8338 -38.6315 -39.4287 -40.2253 -41.0212 -41.8163 375 至 385 列 -42.6106 -43.4038 -44.1959 -44.9869 -45.7765 -46.5647 -47.3513 -48.1363 -48.9196 -49.7011 -50.4805 386 至 396 列 -51.2579 -52.0332 -52.8062 -53.5767 -54.3448 -55.1103 -55.8731 -56.6331 -57.3901 -58.1442 -58.8950 397 至 407 列 -59.6427 -60.3870 -61.1278 -61.8650 -62.5986 -63.3284 -64.0543 -64.7762 -65.4940 -66.2076 -66.9169 408 至 418 列 -67.6217 -68.3220 -69.0177 -69.7086 -70.3947 -71.0758 -71.7518 -72.4227 -73.0883 -73.7485 -74.4033 419 至 429 列 -75.0525 -75.6959 -76.3336 -76.9654 -77.5912 -78.2109 -78.8243 -79.4315 -80.0323 -80.6265 -81.2142 430 至 440 列 -81.7951 -82.3693 -82.9365 -83.4968 -84.0499 -84.5959 -85.1345 -85.6658 -86.1896 -86.7058 -87.2143 441 至 451 列 -87.7151 -88.2080 -88.6929 -89.1699 -89.6386 -90.0992 -90.5514 -90.9953 -91.4306 -91.8574 -92.2755 452 至 462 列 -92.6848 -93.0854 -93.4770 -93.8596 -94.2331 -94.5974 -94.9525 -95.2983 -95.6347 -95.9615 -96.2788 463 至 473 列 -96.5865 -96.8845 -97.1727 -97.4510 -97.7193 -97.9777 -98.2260 -98.4641 -98.6921 -98.9097 -99.1170 474 至 484 列 -99.3139 -99.5003 -99.6761 -99.8413 -99.9959 -100.1397 -100.2728 -100.3950 -100.5063 -100.6066 -100.6959 485 至 495 列 -100.7742 -100.8413 -100.8973 -100.9420 -100.9755 -100.9976 -101.0084 -101.0078 -100.9957 -100.9721 -100.9370 496 至 506 列 -100.8902 -100.8319 -100.7619 -100.6803 -100.5868 -100.4817 -100.3647 -100.2359 -100.0953 -99.9427 -99.7783 507 至 517 列 -99.6019 -99.4135 -99.2132 -99.0008 -98.7764 -98.5400 -98.2915 -98.0309 -97.7582 -97.4734 -97.1764 518 至 528 列 -96.8674 -96.5461 -96.2128 -95.8672 -95.5095 -95.1396 -94.7576 -94.3633 -93.9569 -93.5384 -93.1076 529 至 539 列 -92.6647 -92.2096 -91.7424 -91.2630 -90.7715 -90.2679 -89.7521 -89.2243 -88.6844 -88.1325 -87.5685 540 至 550 列 -86.9924 -86.4044 -85.8044 -85.1925 -84.5686 -83.9329 -83.2853 -82.6258 -81.9546 -81.2716 -80.5768 551 至 561 列 -79.8704 -79.1523 -78.4226 -77.6813 -76.9285 -76.1642 -75.3884 -74.6013 -73.8028 -72.9931 -72.1720 562 至 572 列 -71.3398 -70.4965 -69.6421 -68.7766 -67.9002 -67.0129 -66.1148 -65.2059 -64.2862 -63.3560 -62.4151 573 至 583 列 -61.4637 -60.5019 -59.5298 -58.5473 -57.5546 -56.5518 -55.5389 -54.5160 -53.4832 -52.4406 -51.3883 584 至 594 列 -50.3263 -49.2547 -48.1736 -47.0832 -45.9834 -44.8744 -43.7563 -42.6292 -41.4931 -40.3482 -39.1946 595 至 605 列 -38.0323 -36.8615 -35.6822 -34.4946 -33.2988 -32.0948 -30.8828 -29.6630 -28.4353 -27.1999 -25.9569 606 至 616 列 -24.7065 -23.4487 -22.1836 -20.9114 -19.6323 -18.3462 -17.0534 -15.7539 -14.4479 -13.1354 -11.8167 617 至 627 列 -10.4919 -9.1610 -7.8242 -6.4816 -5.1334 -3.7797 -2.4205 -1.0561 0.3134 1.6879 3.0672 628 至 629 列 4.4513 5.8399 >> plot(x,y) >> subplot(2,1,1) >> %要画两行一列的第一个图 >> subplot(2,1,1) >> plot(y) >> title('直角坐标系绘图') >> subplot(2,1,2) >> theta=angle(y); >> rho=abs(y); >> polar(theta,rho) >> title('极坐标系绘图') >> %数据类型转换 >> %num2str将数字转换位字符串 >> %int2str mat2str str2double str3num cell2mat cell2struct cellstr mat2cell num2cell struct2cell >> a a = 1 2 3 >> isa(a,'int64') ans = 0 >> isa(a,'int32') ans = 0 >> isa(a,'double') ans = 1 >> str='I love you'; >> isa(str,'str') ans = 0 >> %数据类型操作函数 >> %isa（x,'type') >> %判断是否为type指定的类型，是返回1，否则0 >> %cast(x,'type') >> %设置x的类型为type >> a a = 1 2 3 >> aa=cast(a,'uint8') aa = 1 2 3 >> isa(a,'double') ans = 1 >> isa(aa,'double') ans = 0 >> %aa不是double类型的 >> intmax('uint16') ans = 65535 >> realmax('double') ans = 1.7977e+308 >> realmin('double') ans = 2.2251e-308 >> intmax('int8') ans = 127 >> intmax('int16') ans = 32767 >> intmax('int32') ans = 2147483647 >> intmax('int64') ans = 9223372036854775807 >> %系统预定义的特殊变量 >> %ans pi eps >> x=0:1:2*pi; >> sin(x) ans = 0 0.8415 0.9093 0.1411 -0.7568 -0.9589 -0.2794 >> x x = 0 1 2 3 4 5 6 >> cos(x) ans = 1.0000 0.5403 -0.4161 -0.9900 -0.6536 0.2837 0.9602 >> y1=sin(x) y1 = 0 0.8415 0.9093 0.1411 -0.7568 -0.9589 -0.2794 >> y2=cos(x) y2 = 1.0000 0.5403 -0.4161 -0.9900 -0.6536 0.2837 0.9602 >> pi ans = 3.1416 >> %圆周率前50位 >> vpa(pi,50) ans = 3.1415926535897932384626433832795028841971693993751 >> vpa(pi) ans = 3.1415926535897932384626433832795 >> vpa(pi,150) ans = 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940813 >> vpa(pi,1000) ans = 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844609550582231725359408128481117450284102701938521105559644622948954930381964428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273724587006606315588174881520920962829254091715364367892590360011330530548820466521384146951941511609433057270365759591953092186117381932611793105118548074462379962749567351885752724891227938183011949129833673362440656643086021394946395224737190702179860943702770539217176293176752384674818467669405132000568127145263560827785771342757789609173637178721468440901224953430146549585371050792279689258923542019956112129021960864034418159813629774771309960518707211349999998372978049951059731732816096318595024459455346908302642522308253344685035261931188171010003137838752886587533208381420617177669147303598253490428755468731159562863882353787593751957781857780532171226806613001927876611195909216420199 >> %eps浮点数的精度，MATLAB中的最小数 >> eps ans = 2.2204e-16 >> inf ans = Inf >> nan ans = NaN >> %nan不定数 >> %inf无穷 >> %数据输出个数 >> %数据输出格式 >> %通过format命令指定 >> %format short long short_e long_e >> %默认format short >> %四位小数 >> pi ans = 3.1416 >> format long >> pi ans = 3.141592653589793 >> rand(5) ans = 0.814723686393179 0.097540404999410 0.157613081677548 0.141886338627215 0.655740699156587 0.905791937075619 0.278498218867048 0.970592781760616 0.421761282626275 0.035711678574190 0.126986816293506 0.546881519204984 0.957166948242946 0.915735525189067 0.849129305868777 0.913375856139019 0.957506835434298 0.485375648722841 0.792207329559554 0.933993247757551 0.632359246225410 0.964888535199277 0.800280468888800 0.959492426392903 0.678735154857773 >> format short >> rand(5) ans = 0.7577 0.7060 0.8235 0.4387 0.4898 0.7431 0.0318 0.6948 0.3816 0.4456 0.3922 0.2769 0.3171 0.7655 0.6463 0.6555 0.0462 0.9502 0.7952 0.7094 0.1712 0.0971 0.0344 0.1869 0.7547
最后
以上就是端庄老师最近收集整理的关于MATLAB基本指令的全部内容，更多相关MATLAB基本指令内容请搜索靠谱客的其他文章。
本图文内容来源于网友提供，作为学习参考使用，或来自网络收集整理，版权属于原作者所有。
发表评论 取消回复