{"id":875,"date":"2024-03-29T19:03:11","date_gmt":"2024-03-29T11:03:11","guid":{"rendered":"https:\/\/blog.yiming1234.cn\/?p=875"},"modified":"2024-03-29T19:03:12","modified_gmt":"2024-03-29T11:03:12","slug":"matlab%e4%b8%8e%e6%95%b0%e5%ad%a6%e8%ae%a1%e7%ae%97","status":"publish","type":"post","link":"https:\/\/blog.yiming1234.cn\/index.php\/2024\/matlab%e4%b8%8e%e6%95%b0%e5%ad%a6%e8%ae%a1%e7%ae%97\/","title":{"rendered":"Matlab\u4e0e\u6570\u5b66\u8ba1\u7b97"},"content":{"rendered":"\n

\u524d\u8a00<\/h2>\n\n\n\n

\u8fd9\u662f\u4e00\u7bc7\u7b14\u8bb0\u3002\u4e3b\u8981\u7528\u4e8e\u4ecb\u7ecdMatLab\u7684\u4f5c\u7528\u4ee5\u53ca\u5176\u4f5c\u4e3a\u6570\u5b66\u5de5\u5177<\/strong>\u7684\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u76ee\u7684\u662f\u603b\u7ed3\u5b66\u6821\u8bfe\u4ef6\u590d\u4e60\u81ea\u7528<\/strong>\uff0c\u4f46\u662f\u4e0d\u53ef\u80fd\u50cf\u76f8\u5173\u7684\u4e66\u7c4d\u90a3\u4e48\u7cfb\u7edf\u5168\u9762\uff0c\u529b\u6c42\u7b80\u5355\u660e\u4e86\u3002\u90fd\u662f\u4e00\u4e9b\u6700\u57fa\u7840\u7684\u7528\u6cd5\uff0c\u66f4\u8fd1\u4e00\u5c42\u7684\u6df1\u5165\u9700\u8981\u7279\u5b9a\u7684\u73af\u5883\u548c\u5b9e\u4f8b\u3002<\/p>\n\n\n\n

MatLab\u662f\u4e00\u79cd\u9ad8\u7ea7\u6280\u672f\u8ba1\u7b97\u8bed\u8a00\u548c\u4ea4\u4e92\u5f0f\u73af\u5883\uff0c\u7528\u4e8e\u7b97\u6cd5\u5f00\u53d1\u3001\u6570\u636e\u53ef\u89c6\u5316\u3001\u6570\u636e\u5206\u6790\u548c\u6570\u503c\u8ba1\u7b97\u3002\u4f7f\u7528\u573a\u666f\u6709\uff1a\u590d\u6742\u6570\u5b66\u95ee\u9898\u7684\u7edf\u8ba1\u4e0e\u8ba1\u7b97\uff0c\u56fd\u8d5b\u7f8e\u8d5b\u65f6\u7684\u6570\u5b66\u5efa\u6a21\uff0c\u6a21\u7535\u7684\u7ed8\u5236\u4e0e\u6d4b\u8bd5\uff0c\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5f00\u53d1\u7684\u7f16\u5199\uff0c\u5e94\u7528\u7a0b\u5e8f\u7684\u5f00\u53d1\u7b49\u7b49\u3002<\/p>\n\n\n\n

Matlab\u662fMatrix Laboratory\u7684\u7f29\u5199\uff0c\u5176\u8bbe\u8ba1\u521d\u8877\u662f\u7528\u4e8e\u79d1\u5b66\u548c\u5de5\u7a0b\u9886\u57df\u7684\u8ba1\u7b97\u548c\u4eff\u771f\u3002\u56fd\u5185\u5916\u7edd\u5927\u591a\u6570\u7684\u9ad8\u6821\u90fd\u4f1a\u7528\u5230\u3002\u4e3b\u8981\u7528\u4e8e\u5b66\u672f\u73af\u5883<\/strong>\u3002<\/p>\n\n\n\n

\u4f46\u662f\u4f5c\u4e3a\u4e00\u6b3e\u9ad8\u7ea7\u8ba1\u7b97\u8f6f\u4ef6\uff0c\u4e2a\u4eba\u8bc4\u4ef7\u662f\uff1aMatLab\u5c31\u597d\u50cf\u9700\u8981\u7528\u6d82\u5361\u7b14\u4f5c\u7b54\u4e00\u6837\u2014\u2014\u5b58\u5728\uff0c\u4f46\u662f\u53ef\u80fd\u53ef\u4ee5\u88ab2B\u94c5\u7b14\u66ff\u4ee3\u3002<\/p>\n\n\n\n

\u6b63\u6587<\/h2>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n

\u4e0b\u9762\u6b63\u5f0f\u5f00\u59cb\uff0c\u867d\u7136\u5b98\u65b9\u53d1\u5e03\u8fc7MatLab Primer\u6307\u5bfc\u7528\u4e66\uff0c\u4f46\u6bd5\u7adf\u662f\u7eaf\u82f1\u6587\u7684\u3002\u5c31\u4e0d\u9644\u5e26\u94fe\u63a5\u4e86\u3002<\/p>\n\n\n\n

\u57fa\u672c\u51fd\u6570<\/h3>\n\n\n\n

clear\u2014\u2014Delete all variables in the current Workspace
clc\u2014\u2014Clear the Command Window without deleting assigned variables
who\u2014\u2014\u67e5\u770b\u73b0\u6709\u53d8\u91cf
whos\u2014\u2014\u67e5\u770b\u53d8\u91cf\u7ec6\u8282
help<\/strong>\u2014\u2014\u67e5\u770b\u7279\u5b9a\u51fd\u6570\u7684\u5e2e\u52a9
doc<\/strong>\u2014\u2014\u8c03\u7528MATLAB\u5e2e\u52a9\u4e2d\u5fc3<\/p>\n\n\n\n

\u81ea\u7136\u5bf9\u6570e\u2014\u2014\u7528exp\uff081\uff09\u66ff\u4ee3\uff0cexponential
\u4f59\u6570\u2014\u2014rem\uff08x\uff09\uff0cremainder after division
\u5171\u8f6d\u590d\u6570\u2014\u2014conj\uff08x\uff09\uff0ccomplex conjugate<\/p>\n\n\n\n

%\u2014\u2014\u683c\u5f0f\u5316\u64cd\u4f5c\u7b26
f\u2014\u2014\u8f6c\u6362\u5b57\u7b26
\\n\u2014\u2014\u6362\u884c
%.2f\u2014\u2014\u8868\u793a\u5c06\u6d6e\u70b9\u6570\u6570\u503c\u683c\u5f0f\u5316\u4e3a\u5e26\u6709\u4e24\u4f4d\u5c0f\u6570\u7684\u5b57\u7b26\u4e32<\/p>\n\n\n\n

\u5411\u91cf<\/h3>\n\n\n\n

0\u7ef4\u6570\u7ec4\u662f\u6807\u91cf\uff08scalar\uff09,1\u7ef4\u6570\u7ec4\u662f\u5411\u91cf\uff08vector\uff09\uff0c\u4e8c\u7ef4\u6570\u7ec4\u662f\u77e9\u9635\uff08matrix\uff09<\/p>\n\n\n\n

\u7d22\u5f15\u5411\u91cf\u7684\u51fd\u6570
length\uff08x\uff09\u2014\u2014\u8fd4\u56de\u5411\u91cf\u4e2d\u6570\u7684\u4e2a\u6570\uff0c
v\u2018\u2014\u2014\u8fd4\u56de\u8f6c\u7f6e\u5411\u91cf\uff08\u6bd4\u5982\u884c\u5217\u5411\u91cf\u8f6c\u6362\uff09\uff0c
v\uff08i\uff09\u2014\u2014\u8fd4\u56de\u5411\u91cf\u7684\u7b2ci\u4e2a\u6570<\/p>\n\n\n\n

\u6784\u9020\u5411\u91cf\u7684\u51fd\u6570
\u7b49\u95f4\u9694\u5411\u91cf\u2014\u2014\u5f00\u59cb\u503c\uff1a\u6b65\u957f\uff1a\u7ec8\u6b62\u503c \u6216linspace(StartValue,EndValue,PointNumber)\u90fd\u80fd\u5b9e\u73b0\u3002\u6bd4\u5982-10:1:10\u6216linspace\uff08-10,10,21\uff09\u8f93\u51fa[-10,-9,-8,\u2026,0,1,2,\u2026,10]\u3002<\/p>\n\n\n\n

\u77e9\u9635<\/h3>\n\n\n\n
Function<\/td>Meaning<\/td><\/tr>
eye(m,n)<\/td>\u751f\u6210\u5bf9\u89d2\u7ebf\u4e3a1\uff0c\u5176\u4f59\u4e3a0\u7684m-n\u5355\u4f4d\u77e9\u9635\u3002Return an m-by-n matrix with 1 on the main diagonal\u3002<\/td><\/tr>
eye(n)<\/td>\u751f\u6210\u5bf9\u89d2\u7ebf\u4e3a1\uff0c\u5176\u4f59\u4e3a0\u7684\u6b63\u65b9\u5f62\u5355\u4f4d\u77e9\u9635\u3002Return an n-by-n square identity matrix\u3002<\/td><\/tr>
zeros(m,n)<\/td>Return an m-by-n matrix of zeros<\/td><\/tr>
ones(m,n)<\/td>Return an m-by-n matrix of ones<\/td><\/tr>
rand(m,n)<\/td>\u8fd4\u56de\u57280-1\u95f4\u968f\u673a\u7684m-n\u77e9\u9635\u3002Return an m-by-n matrix of random numbers between 0 and 1\u3002<\/td><\/tr>
magic(n)<\/td>\u7528\u4e8e\u751f\u6210\u5e7b\u65b9\u77e9\u9635\u3002Use help command to see its meaning by yourself\u3002<\/td><\/tr><\/tbody><\/table>
\u6784\u9020<\/strong>\u77e9\u9635\u7684\u51fd\u6570<\/figcaption><\/figure>\n\n\n\n

\u7d22\u5f15<\/strong>\u77e9\u9635\u7684\u51fd\u6570
\u5047\u8bbe\u4e00\u4e2a5\u884c6\u5217\u7684\u77e9\u9635M
M\uff082\uff0c\uff1a\uff09\u2014\u2014M\u7684\u7b2c\u4e8c\u884c
M\uff08\uff1a\uff0c2\uff09\u2014\u2014M\u7684\u7b2c\u4e8c\u5217
M\uff082\uff1a4\uff0c\uff1a\uff09\u2014\u2014M\u7684\u7b2c\u4e8c\u5230\u56db\u884c
sum\uff08sum\uff08M\uff09\uff09\u2014\u2014M\u4e2d\u6240\u6709\u5143\u7d20\u7684\u548c
M\uff082\uff0c\uff1a\uff09= [] \u2014\u2014\u5220\u9664M\u7b2c\u4e8c\u884c\u7684\u5143\u7d20
size\uff08M\uff09\u2014\u2014\u8fd4\u56de\u77e9\u9635M\u7684\u7ef4\u5ea6\uff0c\u5373[5,6]<\/p>\n\n\n\n

\u64cd\u4f5c<\/strong>\u77e9\u9635\u7684\u51fd\u6570
A\u2018\u2014\u2014\u8f6c\u7f6e\u77e9\u9635\uff0c
inv\uff08A\uff09\u2014\u2014\u9006\u77e9\u9635\uff08\u4e0e\u539f\u59cb\u77e9\u9635\u76f8\u4e58\u5f97\u5230\u5355\u4f4d\u77e9\u9635\uff09\uff0c
det\uff08A\uff09\u2014\u2014\u77e9\u9635\u7684\u884c\u5217\u5f0f\uff08\u7ebf\u6027\u53d8\u6362\u4e0b\u6240\u5f15\u8d77\u7684\u7f29\u653e\u56e0\u5b50\uff0c[a,b;c,d] det(A)=ad-bc\uff09
A^2\u2014\u2014\u52a0\u4e0ainv\uff0cdet\u53ea\u80fd\u9002\u7528\u4e8e\u65b9\u9635<\/strong>
A*B\u2014\u2014\u4e24\u4e2a\u77e9\u9635\u7684\u70b9\u4e58\uff0c\u5927\u5c0f\u5fc5\u987b\u76f8\u540c
A.*B\u2014\u2014AB\u5927\u5c0f\u76f8\u540c\uff0c\u77e9\u9635\u4e2d\u9010\u4e2a\u5143\u7d20\u76f8\u4e58
A.^B\u2014\u2014\u9010\u4e2a\u5143\u7d20\u6c42\u5e42<\/p>\n\n\n\n

\u753b\u56fe<\/h3>\n\n\n\n

plot\uff08x,y,’r:’\uff09<\/p>\n\n\n\n

\u9700\u8981\u7528\u5230\u4e0a\u9762\u64cd\u4f5c\u77e9\u9635\u7684\u51fd\u6570\uff0c\u6700\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u6ce8\u610f\u8fd9\u91cc\u7684\u201c.\u201d\u4e0d\u80fd\u843d\u4e0b\uff01<\/p>\n\n\n\n

x = linspace(-2,2);\ny = x.^3+2*x.^2-4*x-5;\nplot(x,y)<\/code><\/pre>\n\n\n\n
\u201cr\uff1a\u201d\u4ee3\u8868\u89c4\u5219\uff0c<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u5bf9\u4e8e\u53e0\u52a0\u56fe\uff0c\u5728r\uff1a\u90e8\u5206\u9644\u4e0a\u4e0d\u540c\u7684\u89c4\u5219<\/p>\n\n\n\n
plot(x,y1,'r--')\nhold on\nplot(x,y2,'r:')\nhold off<\/code><\/pre>\n\n\n\n
\u903b\u8f91\u8868\u8ff0<\/h3>\n\n\n\n
\u903b\u8f91\u6570\u7ec4
0\u4ee3\u8868\u9519\u8bef\uff0c1\u4ee3\u8868\u6b63\u786e\uff0c
\u6bd4\u5982\uff0ca=1:5
b=a>=3\uff0c\u5c06\u7ed3\u679c\u8d4b\u503c\u7ed9b\uff0cb=00111
a\uff08b\uff09\u4f7f\u7528b\u4f5c\u4e3a\u663e\u793a\u5143\u7d20\uff0ca=345<\/p>\n\n\n\n
for while\u7ed3\u6784\u7684\u8fed\u4ee3\u5d4c\u5957\u7b49\uff0c\u793a\u4f8b\u4ee3\u7801<\/p>\n\n\n\n
claer;clc\nn = 10;\nA = zeros(n,n);\nfor i = 1:n\n    for j = 1:n\n        A(i,j) = n*(i-1)+j;\n    end\nend\ndisp(A)\nindex = ~isprime(A);\nA(index) = 0;\ndisp(A)<\/code><\/pre>\n\n\n\n
\u81ea\u5b9a\u4e49\u51fd\u6570<\/h3>\n\n\n\n
\u901a\u8fc7MATLAB\u4e8b\u5148\u5185\u7f6e\u7684\u51fd\u6570\uff0c\u8fdb\u884c\u91cd\u6784<\/p>\n\n\n\n
\u4e0e\u4f9d\u8d56input output\u7b49\u7528\u6237\u4ea4\u4e92\u7684\u811a\u672c\u4e0d\u540c\uff0c\u7528\u6237\u81ea\u5b9a\u4e49\u51fd\u6570\u4e00\u822c\u5728\u811a\u672c\u4e2d\u76f4\u63a5\u4f7f\u7528<\/p>\n\n\n\n
\u51fd\u6570\u53d8\u91cf\u7684\u547d\u540d\u4e0d\u80fd\u4f7f\u7528\u7a7a\u683c\uff0c\u6700\u597d\u5199\u5728\u811a\u672c\u7684\u5f00\u5934\u5e76\u9644\u5e26\u6ce8\u91ca<\/p>\n\n\n\n
\u5c3e\u58f0<\/h2>\n\n\n\n
\u5bf9\u4e8eMATLAB\u5b9e\u5728\u4e0d\u77e5\u9053\u80fd\u8bf4\u4e9b\u4ec0\u4e48\uff0c\u5c31\u5f53\u6211\u8bf4\u4e86\u4e00\u5806\u5e9f\u8bdd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u8a00 \u8fd9\u662f\u4e00\u7bc7\u7b14\u8bb0\u3002\u4e3b\u8981\u7528\u4e8e\u4ecb\u7ecdMatLab\u7684\u4f5c\u7528\u4ee5\u53ca\u5176\u4f5c\u4e3a\u6570\u5b66\u5de5\u5177\u7684\u4f7f\u7528\u65b9\u6cd5\u3002 \u76ee\u7684\u662f\u603b\u7ed3\u5b66\u6821\u8bfe\u4ef6\u590d\u4e60\u81ea\u7528\uff0c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[1],"tags":[38],"class_list":["post-875","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-skill-summary"],"_links":{"self":[{"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/posts\/875","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/comments?post=875"}],"version-history":[{"count":3,"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/posts\/875\/revisions"}],"predecessor-version":[{"id":880,"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/posts\/875\/revisions\/880"}],"wp:attachment":[{"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/media?parent=875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/categories?post=875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.yiming1234.cn\/index.php\/wp-json\/wp\/v2\/tags?post=875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}