├── 00.Matlab笔记抄录 ├── img │ ├── 1.png │ └── 2.png ├── 『大一时』Matlab笔记抄录.md └── 『大一时』Matlab笔记抄录.pdf ├── 01.数独『项目1』 ├── 0.数独（Sudokusolve.m）（timed.m）（Sudoku.xls）.txt ├── Sudoku.xls ├── Sudokusolve.m └── timed.m ├── 02.电影推荐系统『项目2』 ├── films.m ├── makedata.m ├── movies.data ├── ratings.data ├── tags.data ├── u.info └── （项目二）使用说明.txt └── README.md /00.Matlab笔记抄录/img/1.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/whoway/MATLAB/0cb00db299798c233b6f4d4f686817954d35ff3d/00.Matlab笔记抄录/img/1.png -------------------------------------------------------------------------------- /00.Matlab笔记抄录/img/2.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/whoway/MATLAB/0cb00db299798c233b6f4d4f686817954d35ff3d/00.Matlab笔记抄录/img/2.png -------------------------------------------------------------------------------- /00.Matlab笔记抄录/『大一时』Matlab笔记抄录.md: -------------------------------------------------------------------------------- 1 | # 『大一时』Matlab笔记抄录 2 | 3 | 4 | 5 | 6 | 7 | > **前述**：本速记笔记不完整，并且是意识流的方式记载的 8 | > 9 | > 1、只是一些当时『不记得的单词』、『函数名』、『注意事项』的记录。 10 | > 11 | > 2、将纸质版上传至GitHub做电子版备份 12 | 13 | 14 | 15 | 16 | 17 | ## 一、基础语法 18 | 19 | - [x] matlab中`%`引导的是『注释行』 20 | 21 | - [x] matlab程序设计： 22 | 23 | - 脚本文件 24 | - 函数文件 25 | 26 | - [x] 脚本文件中： 27 | 28 | 输入： 29 | 30 | ```matlab 31 | a=input('..............'); %即显示' '中的文字或字符、数字，然后将你输入的赋给a 32 | ``` 33 | 34 | 输出： 35 | 36 | ```matlab 37 | fprintf('........%f\n',.........); %“\n”表示换行 38 | ``` 39 | 40 | 函数文件中： 41 | 42 | - 『函数文件名』必须与『函数名』相同 43 | - M函数文件的第1个可执行必须是function 44 | 45 | 函数的『定义』格式： 46 | 47 | ```matlab 48 | function [输出变量列表] = 函数名(变量参数表) 49 | ``` 50 | 51 | 例子有： 52 | 53 | ```matlab 54 | function z=ex3_2(a,b,c) 55 | ``` 56 | 57 | 函数的『调用』格式： %即经函数中参数赋值 58 | 59 | ```matlab 60 | [输出变量列表] = 函数名(输入变量列表) 61 | ``` 62 | 63 | 例子有： 64 | 65 | ```matlab 66 | z=ex3_2(1,2,1) 67 | ``` 68 | 69 | - 经常错的： 70 | - `M = mod(X,Y)`而不是`M=mod(X/Y)` 71 | 72 | ## 二、函数名记忆 73 | 74 | - 本质：matlab的所有命令基于『库函数』 75 | 76 | ### （1）三角函数类 77 | 78 | ```matlab 79 | asin %反正弦 80 | acos 81 | atan 82 | acot 83 | sinh %双曲正弦 84 | cosh 85 | tanh 86 | coth 87 | ``` 88 | 89 | ### （2）指数函数类 90 | 91 | ```matlab 92 | exp %e为底的指数 93 | log %自然对数 94 | log10 %10为底的对数 95 | ``` 96 | 97 | - `sqrt`平方根 98 | - `pow2`2的幂 99 | 100 | ### （3）统计类 101 | 102 | ```matlab 103 | mean %平均值 104 | median %中位数 105 | ``` 106 | 107 | 108 | 109 | ### （4）取整方向类 110 | 111 | ```matlab 112 | floor %向-∞圆整 113 | fix %向0圆整 114 | ceil %向+∞圆整 115 | round %向靠近整数圆整 116 | sign %符号函数 117 | ``` 118 | 119 | - `mod`模除取余 120 | - `rem`求余数 121 | 122 | 123 | 124 | ### （5）其他 125 | 126 | ```matlab 127 | abs %绝对值 128 | conj %复数共轭 129 | real %复数实部 130 | imag %复数虚部 131 | ``` 132 | 133 | 134 | 135 | ### （6）其他常考函数 136 | 137 | ```matlab 138 | sort %排序 139 | length %个数 140 | sum %总和 141 | prod %总乘积 142 | cumprod %累计元素总乘积 143 | ``` 144 | 145 | 146 | 147 | - format格式 148 | 149 | 150 | 151 | ## 三、向量和矩阵 152 | 153 | ### 1、向量的创建： 154 | 155 | #### （1）冒号表达式 156 | 157 | ```matlab 158 | >>> x=1:0.5:Pi 159 | x= 160 | 1.0000 1.5000 2.0000 2.5000 3.0000 161 | ``` 162 | 163 | #### （2）函数法 164 | 165 | - linspance 166 | 167 | ```matlab 168 | linspace(a,b,n) %n处如果没有，默认是100 a为第1元素，b为最后元素，n指n个元素 169 | >>> x=linspace(1,pi,5) 170 | x= 171 | 1.0000 1.5354 2.0708 2.6062 3.1416 172 | ``` 173 | 174 | - logspace 175 | 176 | ```matlab 177 | logspace(a,b,n) 178 | ``` 179 | 180 | 181 | 182 | #### （3）向量的访问 183 | 184 | ```matlab 185 | >>>k=[1,3,5]; 186 | >>>k(3) 187 | 5 188 | >>>k(1:3) %提取从1到3的元素 189 | 1 3 5 190 | >>>k([1 3]) %提取1和3号位元素 191 | 1 5 192 | ``` 193 | 194 | 195 | 196 | 197 | 198 | ### 2、矩阵的创建： 199 | 200 | #### （1）函数生成法 201 | 202 | ```matlab 203 | rand(n) %随机产生n*n的矩阵 204 | rand(m,n) 205 | eye(n) 206 | eye(m,n) 207 | ones(n) 208 | ones(m,n) 209 | diag(A) 210 | diag(a) 211 | magic(n) 212 | ``` 213 | 214 | 215 | 216 | #### （2）拼接法 217 | 218 | ```matlab 219 | >>>x=1:2:5 220 | 1 3 5 221 | >>>y=rand(1,3) 222 | 0.1419 0.4218 0.9157 223 | >>>A=[x;y] %注意是;号 224 | A= 225 | 1 3 5 226 | 0.1419 0.4218 0.9157 227 | >>>B=[A,eye(2,2)] 228 | B= 229 | 1.0000 3.0000 5.0000 1.0000 0 230 | 0.1419 0.4218 0.9157 0 1.0000 231 | 232 | ``` 233 | 234 | - `repmat(A,M,N)`复制矩阵A来构造新的MXN个A的大矩阵 235 | 236 | 237 | 238 | ## 四、零碎的笔记 239 | 240 | ```matlab 241 | num=get(handles.edit1, 'String'); 242 | % 句柄 Tag（标签） 匈牙利命名(String表示字符串) 243 | ``` 244 | 245 | 246 | 247 | ```matlab 248 | str2num % 将字符串（string）转换（to）为双精度的数据（number） 249 | ``` 250 | 251 | 252 | 253 | ```matlab 254 | set(handles.edit1, 'String', ' '); 255 | ``` 256 | 257 | 258 | 259 | ```matlab 260 | open('test 14m.md1'); %打开模型文件 261 | sim('test 14m.md1'); %运行模型文件 262 | plot(tout,yout); %画粒子tout和yout的图 『我做的什么笔记。。。』 263 | ``` 264 | 265 | - `memory` 266 | 267 | 268 | 269 | ## 五、仿真部分 270 | 271 | ```txt 272 | Initial adj.最初的 初值？初始化？ 273 | Variable adj.变量的 274 | ``` 275 | 276 | 277 | 278 | - 1）tout 指time out 『比然会有』 279 | 280 | > %仿真过程中返回的时间变量，为1数组 281 | > 282 | > %默认tout保留最后仿真为1000个数据『列向量』 283 | 284 | - 2）yout指的y out 285 | 286 | > 采样点 out 『列向量』 287 | 288 | - 3）simout 仿真输出模块，用于向matlab传递数据『to workspace』 289 | 290 | > %该模块是将仿真模型中**某一个模块**的信号输出到matlab的工作空间（workspace）中，保存为数组和结构体类型 291 | 292 | 293 | 294 | 仿真Simulink中，『ralational Operator』（关系比较） 295 | 296 | ![1](.\img\\1.png) 297 | 298 | 如图，这个中，表示的意思是： 299 | 300 | 若a>b 301 | 302 | 即：上比较下 303 | 304 | 305 | 306 | ## 六、GUI编程 307 | 308 | ```txt 309 | bar n.条 310 | font n.字体 311 | dlg/dialog Box 对话框 312 | index v.素引 313 | default 默认值 314 | Data 数据 315 | Icon 图标 316 | options 选项 317 | ``` 318 | 319 | 320 | 321 | ### 句柄的概念 322 | 323 | Matlab中图形句柄 324 | 325 | - 1）句柄是matlab语言中独有的参数，相当于C语言中的指针 326 | - 2）句柄 327 | - 函数柄 328 | - 对象柄 329 | - 图形柄 330 | 331 | > 图形句柄就指1个图形，在生成图形时间时得到1代号 332 | > 333 | > 比如语句： 334 | > 335 | > `h=plot(x,y)` h即1个图形句柄 336 | > 337 | > 在后来的某个地方就可以用h代表这个图 338 | > 339 | > 比如： 340 | > 341 | > set(h,.........) %对该图形进行再设置 342 | 343 | 344 | 345 | - gcf 返回当前Figure对象的句柄值 346 | 347 | 348 | 349 | 350 | 351 | ## 七、符号计算 352 | 353 | ```matlab 354 | a=sym('sin(2)') %创建符号常量 sym('常量') 355 | >>a= 356 | sin(2) 357 | a=sym('sin(2)') %sym可以把数值转换成某格式的符号常量 358 | >>a= 359 | 4095111552621091/450359962730496 360 | ``` 361 | 362 | > sym(常量,常量) %参数 363 | > 364 | > - d返回最接近的十进制的数值 365 | > - f返回最接近的浮点表示 366 | > - f返回最接近的『有理数』 367 | > - e带有机器浮点误差的有理值；『默认的』 368 | 369 | 370 | 371 | ```matlab 372 | sym 变量 参数 %创建符号变量 373 | syms 变量1 变量2 参数 %创建完符号变量后，若在某表达式中全用到该变量，则该表达式则为符号表达式了！『若不限定，则参数可省』 374 | sym('表达式') %创建符号表达式 375 | sym('矩阵') %创建符号矩阵 376 | ``` 377 | 378 | 379 | 380 | symbol 符号 381 | 382 | ```matlab 383 | B=('[a b ; c d]') %创建字符串矩阵 384 | >>B= 385 | [a b ; c d] 386 | ``` 387 | 388 | 389 | 390 | ```txt 391 | digits(n) %设定默认的精度，n为所期望的有效倍数 392 | digits函数可以改变默认的有效位数来改变精度 393 | vpa(s,n) %将s表示为n位有效位数的符号对象 394 | PS： s可以是数值对象，亦可为符号对象 395 | ``` 396 | 397 | 398 | 399 | ```matlab 400 | x1=2/3 %数值型 401 | >>x1= 402 | 0.6667 403 | >>x2=sym(2/3) %有理数型 404 | x2= 405 | 2/3 406 | >>x3=vpa('2/3',32) %VPA型 407 | x3= 408 | 0.6666』6666』6666』6666』6666』6666』6666』6666』6666』 409 | %注意，上面的』是不会打印出来的，只是我用来数数的 410 | ``` 411 | 412 | 413 | 414 | 数值对象： 415 | 416 | - sym 有理数型符号对象 417 | - vpa VPA型符号对象 418 | 419 | 以上2者，如果用double就能转换为『数值对象』 420 | 421 | 422 | 423 | ```matlab 424 | >>a1=sym('3*sqrt(5)+pi') 425 | a1= 426 | 3*sqrt(5)+pi 427 | >>b1=double(a1) %N=double(s) %s为符号对象，N为数值变量 428 | b1= 429 | 9.8498 430 | >>b3=eval(a1) %函数eval()可以得到符号变量的数值结果 431 | b3= 432 | 9.8498 433 | ``` 434 | 435 | 436 | 437 | ## 八、『科研图形绘制』 438 | 439 | ```matlab 440 | plot(t,y) 441 | set(gca,'YTick',-1:0.5:1); %将该图的y轴变为，以-1到1每小格0.5 442 | text(pi,0,'\leftarrow sin(x)', 'FontSize', 18); 443 | text(pi,0,'\leftarrow sin(x)', 'Color', 'r'); 444 | ``` 445 | 446 | - bar 条状图 447 | - hist 直方图 『统计』 448 | 449 | ```matlab 450 | %隐函数绘图 451 | syms x y 452 | f=x^3+y^3+1; 453 | explot(f); 454 | ``` 455 | 456 | 457 | 458 | ```matlab 459 | X=[0 0.2 0.8 1 0.5 0] 460 | Y=[1 0 0 1 1.8 1] 461 | patch(X,Y,'r','LineWidth',2) %填充颜色为red，边框的字的宽度为2 462 | ``` 463 | 464 | 465 | 466 | ### （1）绘图的各种属性 467 | 468 | ```matlab 469 | xlabel(sin(x)) %给X轴加上名称 似ylabel、zlabel figure 470 | title('名称') %给图形取名称 471 | text(pi,0,'\leftarrow sin(x)') %在点(pi,0)处加上<-sinx 472 | %转义字符 \leftarrow \rightarrow \pi \sigma 473 | grid on/off %.... 474 | linspace(0,pi,12) %首为0，末位pi,总共12个数据点（等分） 475 | subplot(2,2,1) %将区域分为2行2列，4个区域，将图画在第1区 476 | axis( [0 pi -1 1] )%规定了x,y轴的最小、最大值 477 | axis( [xmin xmax ymin ymax] ) 478 | hold on %在该图上继续画 479 | legend('三角函数'); %给某线命名...『——三角函数』 480 | ``` 481 | 482 | 483 | 484 | ### （2）plot 485 | 486 | ```matlab 487 | plot(x,y1,'b-',x,y2,'r--'); 488 | legend('sin(x)','cos(x)'); 489 | plot(x1,y1,'r.','LineWidth',1); 490 | ``` 491 | 492 | 493 | 494 | ### （3）plotyy 495 | 496 | 497 | - plotyy 双y轴 498 | - plotyy(x,y1,x,y2) 499 | 500 | ```matlab 501 | plotyy(x,y1,x,y2); 502 | h=plotyy(x,y1,x,y2); 503 | set(get( h(1), 'Children'), 'LineWidth', 3); 504 | set(get( h(2), 'YLabel'), 'String', '\bf快衰'); %加粗黑体 505 | title( '衰变曲线','color', 'r','FontSize',18); 506 | ``` 507 | 508 | 509 | 510 | ### （4）直方图 511 | 512 | ```matlab 513 | x=-2:2 514 | y=[3,5,2,4,1 515 | 3,4,5,2,1 516 | 5,4,3,2,5]; %直方图 517 | bar(x',y','stacked'); %堆叠起来；需为行向量 518 | colormap(cool); 519 | ylabe(c'\sigma Y'); 520 | ``` 521 | 522 | - help `bar`和`barh` 523 | - 去了解'stacked'和'grouped' 524 | 525 | ### （5）画三维曲面图 526 | 527 | ```matlab 528 | [x,y]=meshgrid(-4:0.2:4, -4:0.2:4); %x,y是栅格点的坐标 529 | z=exp(-0.5.*(x.^2 + y.^2 )); 530 | surf(x,y,z); %画三维曲面图 531 | contour(x,y,z); %画二维（平面）等高线 532 | contour3(x,y,z); %画三维（空间）等高线 533 | ``` 534 | 535 | 536 | 537 | ### （6）图像类代码 538 | 539 | ```matlab 540 | syms x y 541 | f=x^2+y^2-1; 542 | ezplot(f,[-1,1]); %告诉的 543 | ``` 544 | 545 | 546 | 547 | ```matlab 548 | [AX,H1,H2]=plotyy(x,y1,x,y2); 549 | set(H1,'LineWidth',1.5); 550 | set(H2,'LineWidth',1.5); 551 | ``` 552 | 553 | 554 | 555 | - 下面的代码是画那种『对数左边』的，比如x坐标是10-2、10-1、100啥的 556 | 557 | ```matlab 558 | x=1/100:0.001:10; 559 | y1=log(x)+x; 560 | y2=x+5; 561 | semilogx(x,y1); 562 | hold on; 563 | semilogx(x,y2,'r'); 564 | ``` 565 | 566 | 567 | 568 | ```matlab 569 | x=[48 12 10 6]; 570 | pie(x); 571 | Legend( {'优秀', '良好', '中等', '及格', '不及格'}, ... 572 | 'Location', 'West Out Side'); 573 | 574 | ``` 575 | 576 | ![2](.\img\2.png) 577 | 578 | 类似于上面的图形，放在西边外面 579 | 580 | ### （7）饼状图 581 | 582 | ```matlab 583 | x=[4 8 12 10 6] 584 | explode=[ 1 0 1 1 0 ]; %1为出来 585 | pie3( x, explode, {'优秀', '良好', '中等', '及格', '不及格'} ); 586 | %将它放在图上 587 | ``` 588 | 589 | 590 | 591 | ### （8）『拟合图像』 592 | 593 | ```matlab 594 | time=[...略...]; 595 | temp=[...略...]; 596 | scatter(time , temp , '*', 'LineWidth', 2); %画散点图 597 | p=polyfit(time, temp, 5); 598 | %polyfit将time,temp拟合成5次方的多项式，形成1个相应的多项式向量积 599 | y=polyval(p,time); 600 | %算出p代表的多项式在各点x处的值 601 | f=poly2sym(p); %将p所代表的——>转化——>符号函数 602 | ``` 603 | 604 | 605 | 606 | ```matlab 607 | x=9; 608 | y=subs(f,x); 609 | hold on; 610 | plot(x,y,'rs'); 611 | ezplot(f, [0 9] ); 612 | legend('\bf散点图', '\bf poly', '预测点' ); 613 | ``` 614 | 615 | 616 | 617 | - `subplot( 2,2,[2,4] );` 合并2,4区 618 | 619 | 620 | 621 | ```matlab 622 | x=linspace(-3*pi, 3*pi, 151); 623 | y=sin(x)./x; 624 | polt(x,y,'LineWidth',8, 'Color', 'r'); 625 | %gcf是当前窗口的句柄 626 | set( gcf, 'color', 'y'); %将当前底图颜色弄成黄色 627 | set(gca,'YGrid','on'); %当前窗口的坐标轴句柄 628 | ``` 629 | 630 | 631 | 632 | ```matlab 633 | x=-2:.5:2; 634 | y=randn(10,1); %产生正态分布随机数10个，为列向量 635 | h=figure; 636 | set(h,'Name','直方图和条形图');%设置弹出的框的最左上的为该名 637 | subplot(2,3,[1,4]); 638 | hist(y,x); 639 | [count,centers]=hist(y,x); 640 | %在y中统计每个区间的数据个数count向量，centers为中心 641 | 642 | subplot(2,3,[2 5] ); 643 | bar(centers,count); %条形图 644 | subplot(2,3,[3 6]); 645 | y=[end]=[]; %使x,y长度一致 646 | 647 | helpdlg('请理解'); %对话框 648 | ``` 649 | 650 | 651 | 652 | 653 | 654 | 655 | 656 | 657 | 658 | ## 九、函数类-零碎代码 659 | 660 | ```matlab 661 | function result=main_a(a) 662 | %将数据分割赋值 663 | b=a(1); 664 | c=a(2); 665 | d=a(3); 666 | e=a(4); 667 | add_result=add_1(b,c,d,e); 668 | sub_result=sub_1(b,c,d,e); 669 | mul_result=mul_1(b,c,d,e); 670 | div_result=div_1(b,c,d,e); 671 | result=add_result+sub_result+mul_result+div_result; 672 | 673 | %% 子函数 674 | function add_result=add_1(b,c,d,e) 675 | add_result=b+c+d+e; 676 | function sub_result=sub_1(b,c,d,e) 677 | sub_result=b-c-d-e; 678 | function mul_result=mul_1(b,c,d,e) 679 | mul_result=b*c*d*e; 680 | function div_result=div_1(b,c,d,e) 681 | div_result=b*c/d*e; 682 | ``` 683 | 684 | 685 | 686 | ```matlab 687 | i3=num2str(ii^3); 688 | i4=num2str(ii^4); 689 | i_34=sort( [i3 i4] ); %两数合并后升序排列 690 | '0 1 2 3 4 5 6 7 8 9' 691 | disp( ['这数是' num2str(ii) ] ); 692 | disp( ['它的3次方是' i3, '4次方是' i4 ] ); 693 | %告诉了我们disp似fprintf的输出？？ 694 | %1）这个数是18 695 | %2）它的3次方是5832,4次方是104976 696 | ``` 697 | 698 | - `isequal(i_34, '0123456789');` 699 | 700 | 701 | 702 | ## 十、GUI类-零碎代码 703 | 704 | 705 | 706 | `set(hh, "UIcontextMenu", handles.kkk );` 707 | 708 | 709 | 710 | ```matlab 711 | get(handles.popupmenul, 'value'); %弹出菜单 712 | %获得弹出菜单，选了第n行 713 | %下面是『清楚方式』 714 | %1)set(handles.edit1, 'string', ''); 715 | %2)cls %清楚图像 716 | ``` 717 | 718 | 719 | 720 | - 关于： 721 | - 『滑动条』、『复选框』的笔记，自己看不懂自己的速记笔记。。。 722 | 723 | -------------------------------------------------------------------------------- /00.Matlab笔记抄录/『大一时』Matlab笔记抄录.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/whoway/MATLAB/0cb00db299798c233b6f4d4f686817954d35ff3d/00.Matlab笔记抄录/『大一时』Matlab笔记抄录.pdf -------------------------------------------------------------------------------- /01.数独『项目1』/0.数独（Sudokusolve.m）（timed.m）（Sudoku.xls）.txt: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/whoway/MATLAB/0cb00db299798c233b6f4d4f686817954d35ff3d/01.数独『项目1』/0.数独（Sudokusolve.m）（timed.m）（Sudoku.xls）.txt -------------------------------------------------------------------------------- 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931|60|M|educator|33556 932 | 932|58|M|educator|06437 933 | 933|28|M|student|48105 934 | 934|61|M|engineer|22902 935 | 935|42|M|doctor|66221 936 | 936|24|M|other|32789 937 | 937|48|M|educator|98072 938 | 938|38|F|technician|55038 939 | 939|26|F|student|33319 940 | 940|32|M|administrator|02215 941 | 941|20|M|student|97229 942 | 942|48|F|librarian|78209 943 | 943|22|M|student|77841 944 | -------------------------------------------------------------------------------- /02.电影推荐系统『项目2』/u.info: -------------------------------------------------------------------------------- 1 | 943 users 2 | 1682 items 3 | 100000 ratings -------------------------------------------------------------------------------- /02.电影推荐系统『项目2』/（项目二）使用说明.txt: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/whoway/MATLAB/0cb00db299798c233b6f4d4f686817954d35ff3d/02.电影推荐系统『项目2』/（项目二）使用说明.txt -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Matlab仓库 2 | 3 | ### 4 | 5 | #### 目录 6 | 7 | - [x] :books:Matlab笔记抄录 8 | - 大一初学时记载的意识流笔记备份 9 | - [x] :black_nib: 数独『项目1』 10 | - 调用的库函数solve题目 11 | - [x] :movie_camera:电影推荐系统『项目2』 12 | - 基于『余弦相似度』算法实现的 13 | 14 | 以前的课程作业，就当是个备份吧，有Matlab课程的可能需要 15 | 16 | --------------------------------------------------------------------------------