{"id":561,"date":"2020-01-22T14:40:44","date_gmt":"2020-01-22T06:40:44","guid":{"rendered":"http:\/\/123.57.142.208\/?p=197"},"modified":"2020-01-22T14:40:44","modified_gmt":"2020-01-22T06:40:44","slug":"matlab-%e6%95%b0%e6%a8%a1%e8%a2%ab%e8%bf%ab%e8%90%a5%e4%b8%9a-02%e5%85%a5%e9%97%a8%e7%af%87","status":"publish","type":"post","link":"http:\/\/43.142.23.155\/?p=561","title":{"rendered":"Matlab-\u6570\u6a21\u88ab\u8feb\u8425\u4e1a-02\u5165\u95e8\u7bc7"},"content":{"rendered":"

\u6211\u4eec\u7ee7\u7eed\u8bb0\u5f55matlab\u5165\u95e8\u64cd\u4f5c\uff0c\u6211\u4e89\u53d6\u7ed9\u4ed6\u6392\u7248\u597d\u770b\u70b9<\/p>\n

\u4e00\u3001Matlab\u4e2d\u7684\u90e8\u5206\u57fa\u7840\u51fd\u6570<\/h2>\n

1\u3001max\u548cmin\u51fd\u6570\uff1a<\/p>\n

A = [1 2 3 4 5];<\/p>\n

max(A)<\/p>\n

ans=<\/p>\n

5<\/p>\n

 <\/p>\n

min\u540c\u4e0a\u3002<\/p>\n

 <\/p>\n

\u81f3\u4e8e\u591a\u4e2a\u53c2\u6570\uff1a<\/p>\n

\"\"<\/p>\n

\u662f\u4e24\u4e2a\u6570\u7ec4\u7684\u5143\u7d20\u4e4b\u95f4\u8fdb\u884c\u6bd4\u8f83\uff0c\u91c7\u7528\u76f8\u5bf9\u8f83\u5927\u7684\uff0c\u6211\u4eec\u518d\u7ee7\u7eed\u770b\u8fd9\u6837\u7684<\/p>\n

\"\"<\/p>\n

\u4e5f\u5c31\u662f\u8bf4\uff0c\u591a\u4e2a\u6570\u7ec4\u6bd4\u8f83\u5fc5\u987b\u8981\u7ef4\u5ea6\u4e00\u81f4\u3002<\/p>\n

 <\/p>\n

\u5982\u679c\u5b58\u5728\u591a\u4e2a\u8f93\u51fa\u53c2\u6570\uff0c\u5c31\u5c06\u5176\u62ec\u5728\u65b9\u62ec\u53f7\u4e2d\uff1a<\/p>\n

[maxA,location] = max(A)<\/p>\n

maxA =<\/p>\n

5<\/p>\n

 <\/p>\n

location =<\/p>\n

3<\/p>\n

 <\/p>\n

 <\/p>\n

2\u3001\u5c06\u60f3\u8fdb\u884c\u8f93\u51fa\u7684 \u4efb\u4f55\u5b57\u7b26\u5e8f\u5217 \u62ec\u5728\u5355\u5f15\u53f7\u4e2d\uff1a<\/p>\n

disp(‘hello world’)<\/p>\n

hello world<\/p>\n

 <\/p>\n

 <\/p>\n

3\u3001clc \u51fd\u6570: \u6e05\u7a7a \u547d\u4ee4\u884c\u7a97\u53e3\u3002\uff08clc\u51fd\u6570\u4e0d\u9700\u8981\u4efb\u4f55\u8f93\u5165\u4e14\u4e0d\u4f1a\u8fd4\u56de\u4efb\u4f55\u8f93\u51fa\uff09<\/p>\n

 <\/p>\n

\u4e8c\u3001\u5229\u7528Matlab\u4f5c\u4e8c\u7ef4\u4e0e\u4e09\u7ef4\u56fe<\/h2>\n

1\u3001\u4e8c\u7ef4\u56fe\u7684\u5feb\u901f\u5236\u4f5c\uff1a<\/h4>\n

\u4f7f\u7528 plot \u51fd\u6570\u6765\u521b\u5efa\u4e8c\u7ef4\u7ebf\u56fe\uff0c\u4f8b\u5982\uff0c\u7ed8\u5236\u4ece 0 \u5230 2\\pi\u4e4b\u95f4\u7684\u6b63\u5f26\u51fd\u6570\u503c\uff1a<\/p>\n

x = 0:pi\/100:2*pi;
\n>> y = sin(x);
\n>> plot(x,y)<\/p>\n

\u8fd9\u6837\u5c31\u53ef\u4ee5\u7b80\u5355\u7684\u505a\u51fa\u4e00\u4e2a\u56fe\u4e86<\/p>\n

\u4f46\u662f\u8fd9\u6837\u7684\u56fe\u91cc\u9762\u6ca1\u6709\u6807\u8bb0x\uff0cy\u8f74\uff0c\u800c\u4e14\u751f\u6210\u7684\u56fe\u7247\u6ca1\u6709\u540d\u5b57<\/p>\n

\u6240\u4ee5\uff1a<\/p>\n

xlabel(‘x’)<\/p>\n

ylabel(‘y’)<\/p>\n

title(‘Sine Function’)<\/p>\n

 <\/p>\n

\u53ef\u4ee5\u81ea\u5df1\u968f\u4fbf\u8d77\u7684<\/p>\n

\u8fd9\u91cc\u9762\u4f5c\u56fe\u548cpy\u8fd8\u662f\u6709\u5f88\u5927\u7684\u76f8\u4f3c\u7a0b\u5ea6\uff0cpy\u53ef\u4ee5\u8c03\u6574\u7ebf\u6bb5\u6837\u5f0f\u548c\u989c\u8272\uff0cmatlab\u81ea\u7136\u4e5f\u53ef\u4ee5<\/p>\n

\u6211\u4eec\u901a\u8fc7\u5411 plot \u51fd\u6570\u6dfb\u52a0\u7b2c\u4e09\u4e2a\u8f93\u5165\u53c2\u6570\uff0c\u53ef\u4f7f\u7528\u7ea2\u8272\u865a\u7ebfr–\u7ed8\u5236\u53d8\u91cf\uff1a<\/p>\n

plot(x,y,’r–‘)<\/p>\n

\u6b64\u5916\u8fd8\u4f1a\u6709+\u3001o \u6216 *\u7b49\u6837\u5f0f<\/p>\n

\u4f8b\u5982\uff0c’g:*’ \u8bf7\u6c42\u7ed8\u5236\u4f7f\u7528 * \u6807\u8bb0\u7684\u7eff\u8272\u70b9\u7ebf\u3002<\/p>\n

\u4f46\u662f\u4ee5\u4e0a\u8fd9\u4e9b\u6362\u6837\u5f0f\u662f\u4e3a\u4e86\u597d\u770b\u5417\uff1f\u76f4\u7537\u8868\u793a\u5f53\u7136\u4e0d\u662f\uff08\u72d7\u5934<\/p>\n

\u989c\u8272\u548c\u6837\u5f0f\u66f4\u591a\u4e3a\u4e86\u8ba9\u56fe\u7247\u4e2d\u7684\u66f2\u7ebf\u76f8\u4e92\u6613\u4e8e\u533a\u5206\uff0c\u53ef\u662f\u6211\u4eec\u5e94\u8be5\u600e\u4e48\u8ba9\u56fe\u7ebf\u753b\u5728\u4e00\u4e2a\u56fe<\/strong>\u4e2d\u5462~<\/p>\n

\u8981\u5c06\u7ed8\u56fe\u6dfb\u52a0\u5230\u73b0\u6709\u56fe\u7a97\u4e2d\uff0c\u4f7f\u7528 hold on\u3002\u5728\u4f7f\u7528 hold off \u6216\u5173\u95ed\u7a97\u53e3\u4e4b\u524d\uff0c\u5f53\u524d\u56fe\u7a97\u7a97\u53e3\u4e2d\u4f1a\u663e\u793a\u6240\u6709\u7ed8\u56fe\u3002<\/p>\n

 <\/p>\n

x = 0:pi\/100:2*pi;
\ny = sin(x);
\nplot(x,y)
\nhold on<\/p>\n

y2 = cos(x);
\nplot(x,y2,’:’)
\nlegend(‘sin’,’cos’)<\/p>\n

hold off<\/p>\n

 <\/p>\n

\u4e09\u7ef4\u56fe\u7684\u5feb\u901f\u5236\u4f5c\uff1a<\/h4>\n

\u4e09\u7ef4\u56fe\u901a\u5e38\u663e\u793a\u4e00\u4e2a\u7531\u5e26\u4e24\u4e2a\u53d8\u91cf\u7684\u51fd\u6570\uff08\u5373\u00a0z = f (x,y)\uff09\u5b9a\u4e49\u7684\u66f2\u9762\u56fe\u3002<\/p>\n

\u8981\u8ba1\u7b97\u00a0z\uff0c\u9996\u5148\u4f7f\u7528\u00a0meshgrid\u00a0\u5728\u6b64\u51fd\u6570\u7684\u57df\u4e2d\u521b\u5efa\u4e00\u7ec4 (x,y) \u70b9\uff0c\u7136\u540e\u521b\u5efa\u66f2\u9762\u56fe\uff1a<\/p>\n

[X,Y] = meshgrid(-2:.2:2);
\nZ = X .* exp(-X.^2 – Y.^2);
\nsurf(X,Y,Z)<\/p>\n

surf \u51fd\u6570\u53ca\u5176\u4f34\u968f\u51fd\u6570 mesh \u4ee5\u4e09\u7ef4\u5f62\u5f0f\u663e\u793a\u66f2\u9762\u56fe\u3002surf \u4f7f\u7528\u989c\u8272\u663e\u793a\u66f2\u9762\u56fe\u7684\u8fde\u63a5\u7ebf\u548c\u9762\u3002<\/p>\n

\u800cmesh \u751f\u6210\u4ec5\u4ee5\u989c\u8272\u6807\u8bb0\u8fde\u63a5\u5b9a\u4e49\u70b9\u7684\u7ebf\u6761\u7684\u7ebf\u6846\u66f2\u9762\u56fe<\/p>\n

 <\/p>\n

\u800c\u4e3a\u4e86\u8ba9\u56fe\u7247\u6613\u4e8e\u5bf9\u6bd4\u6216\u5bf9\u7167\uff0c\u5b50\u56fe\u529f\u80fd\u5c31\u4f1a\u663e\u5f97\u66f4\u52a0\u7684\u4eba\u6027\u5316<\/p>\n

\u4f7f\u7528\u00a0subplot\u00a0\u51fd\u6570\u53ef\u4ee5\u5728\u540c\u4e00\u7a97\u53e3\u7684\u4e0d\u540c\u5b50\u533a\u57df\u663e\u793a\u591a\u4e2a\u7ed8\u56fe\u3002<\/p>\n

subplot\u00a0\u7684\u524d\u4e24\u4e2a\u8f93\u5165\u8868\u793a\u8981\u753b\u51e0\u884c\u51e0\u5217\uff0c\u7b2c\u4e09\u4e2a\u8f93\u5165\u8868\u793a\u5f53\u524d\u56fe\u8981\u753b\u5728\u7b2c\u51e0\u4e2a\u4f4d\u7f6e\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5728\u56fe\u7a97\u7a97\u53e3\u7684 2\u00d72 \u7f51\u683c\u4e2d\u521b\u5efa\u56db\u4e2a\u7ed8\u56fe\u3002<\/p>\n

t = 0:pi\/10:2*pi;
\n[X,Y,Z] = cylinder(4*cos(t));
\nsubplot(2,2,1); mesh(X); title(‘X’);
\nsubplot(2,2,2); mesh(Y); title(‘Y’);
\nsubplot(2,2,3); mesh(Z); title(‘Z’);
\nsubplot(2,2,4); mesh(X,Y,Z); title(‘X,Y,Z’);
\n\"\"<\/p>\n

 <\/p>\n

 <\/p>\n

\u4e09\u3001\u4f7f\u7528Matlab\u7684\u7f16\u7a0b\u4e0e\u811a\u672c<\/h2>\n

\u811a\u672c \u662f\u6700\u7b80\u5355\u7684\u4e00\u79cd MATLAB\u7a0b\u5e8f\u3002\u662f\u4e00\u4e2a\u5305\u542b\u591a\u884c\u8fde\u7eed MATLAB \u547d\u4ee4\u548c\u51fd\u6570\u8c03\u7528\u7684\u6269\u5c55\u540d\u4e3a .m \u7684\u6587\u4ef6\u3002\u5728\u547d\u4ee4\u884ccmd\u4e2d\u952e\u5165\u811a\u672c\u540d\u79f0\u5373\u53ef\u8fd0\u884c\u8be5\u811a\u672c\u3002<\/p>\n

1\u3001\u521b\u5efa\u811a\u672c<\/p>\n

edit \u540d\u79f0<\/p>\n

\u7136\u540e\u5728\u811a\u672c\u4e2d\u548cmatlab\u4e00\u6837\u7684\u8bed\u6cd5\u7684\u4ee3\u7801<\/p>\n

eg.<\/p>\n

n = 50;
\nr = rand(n,1);
\nplot(r)<\/p>\n

m = mean(r);
\nhold on
\nplot([0,n],[m,m])
\nhold off
\ntitle(‘Mean of Random Uniform Data’)<\/p>\n

 <\/p>\n

\u548c\u9ad8\u7ea7\u8bed\u8a00\u4e00\u6837\uff0c\u7f16\u5199\u4ee3\u7801\u65f6\uff0c\u6700\u597d\u6dfb\u52a0\u63cf\u8ff0\u4ee3\u7801\u7684\u6ce8\u91ca\u3002\u4f7f\u7528\u767e\u5206\u6bd4 (%) \u7b26\u53f7\u6dfb\u52a0\u6ce8\u91ca\u3002<\/p>\n

\u8bb0\u5f97\u5c06\u6587\u4ef6\u4fdd\u5b58\u5728\u5f53\u524d\u6587\u4ef6\u5939\u4e2d\u3002<\/p>\n

 <\/p>\n

2\u3001\u903b\u8f91\u4e0e\u5faa\u73af\u8bed\u53e5<\/p>\n

 <\/p>\n

\u5728\u811a\u672c\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5173\u952e\u5b57\u00a0for\u3001while\u3001if\u00a0\u548c\u00a0switch\u00a0\u5faa\u73af\u5e76\u6709\u6761\u4ef6\u5730\u6267\u884c\u4ee3\u7801\u6bb5\u3002<\/p>\n

\u4f8b\u5982\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a\u00a0calcmean.m\u00a0\u7684\u811a\u672c\uff0c\u8be5\u811a\u672c\u4f7f\u7528\u00a0for\u00a0\u5faa\u73af\u6765\u8ba1\u7b97 5 \u4e2a\u968f\u673a\u6837\u672c\u7684\u5747\u503c\u548c\u603b\u5747\u503c\u3002<\/p>\n

nsamples = 5;
\nnpoints = 50;<\/p>\n

for k = 1:nsamples
\ncurrrentData = rand(npoints,1);
\nsampleMean(k) = mean(currentData);
\nend
\noverallMean = mean(sampleMean)<\/p>\n

 <\/p>\n

\u5728\u7f16\u8f91\u5668\u4e2d\uff0c\u5728\u00a0calcmean.m\u00a0\u672b\u5c3e\u53ef\u4ee5\u6dfb\u52a0\u6761\u4ef6\u8bed\u53e5\uff0c\u4f7f\u5176\u6839\u636e\u00a0overallMean\u00a0\u7684\u4e0d\u540c\u503c\u663e\u793a\u4e0d\u540c\u7684\u4fe1\u606f\uff1a<\/p>\n

if overallMean < .49
\ndisp(‘Mean is less than expected’)
\nelseif overallMean > .51
\ndisp(‘Mean is greater than expected’)
\nelse
\ndisp(‘Mean is within the expected range’)
\nend<\/p>\n

 <\/p>\n

\u56db\u3001\u5173\u4e8ematlab\u7684\u6587\u6863\u548chelp\u67e5\u770b<\/h2>\n

\u4f7f\u7528 doc \u547d\u4ee4\u5728\u5355\u72ec\u7684\u7a97\u53e3\u4e2d\u6253\u5f00\u51fd\u6570\u6587\u6863
\ndoc mean<\/p>\n

\u5728\u952e\u5165\u51fd\u6570\u8f93\u5165\u53c2\u6570\u7684\u5de6\u62ec\u53f7\u4e4b\u540e\u6682\u505c\uff0c\u6b64\u65f6\u547d\u4ee4\u884c\u7a97\u53e3\u4e2d\u4f1a\u663e\u793a\u76f8\u5e94\u51fd\u6570\u7684\u63d0\u793a\uff08\u51fd\u6570\u6587\u6863\u7684\u8bed\u6cd5\u90e8\u5206\uff09
\nmean(<\/p>\n

\u4f7f\u7528 help \u547d\u4ee4\u53ef\u5728\u547d\u4ee4\u884c\u7a97\u53e3\u4e2d\u67e5\u770b\u76f8\u5e94\u51fd\u6570\u7684\u7b80\u660e\u6587\u6863
\nhelp mean<\/p>\n

 <\/p>\n

\uff08\u5176\u5b9e\u4e5f\u90fd\u6ca1\u5565\uff0c\u76ee\u524d\u4f4d\u7f6e\u53ea\u662f\u4e00\u4e9b\u6700\u6700\u57fa\u672c\u7684\u64cd\u4f5c\uff0c\u4e4b\u540e\u8003\u8651\u4e00\u624b\u5b9e\u64cd\uff09<\/p>\n

some copy from \u5b98\u7f51<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6211\u4eec\u7ee7\u7eed\u8bb0\u5f55matlab\u5165\u95e8\u64cd\u4f5c\uff0c\u6211\u4e89\u53d6\u7ed9\u4ed6\u6392\u7248\u597d\u770b\u70b9 \u4e00\u3001Matlab\u4e2d\u7684\u90e8\u5206\u57fa\u7840\u51fd\u6570 1\u3001max\u548cmin\u51fd\u6570\uff1a A = [1 2 3 4 5]; max(A) ans= 5   min\u540c...<\/p>\n","protected":false},"author":1,"featured_media":188,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-561","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-8"],"_links":{"self":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts\/561","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=561"}],"version-history":[{"count":0,"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/posts\/561\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=\/wp\/v2\/media\/188"}],"wp:attachment":[{"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=561"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=561"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/43.142.23.155\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=561"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}