{"id":213,"date":"2021-11-16T10:01:03","date_gmt":"2021-11-16T02:01:03","guid":{"rendered":"https:\/\/scutvk.cn\/?p=213"},"modified":"2021-11-16T14:10:31","modified_gmt":"2021-11-16T06:10:31","slug":"matlab%e5%9f%ba%e7%a1%80%e6%93%8d%e4%bd%9c%e7%ac%94%e8%ae%b02","status":"publish","type":"post","link":"https:\/\/scutvk.cn\/?p=213","title":{"rendered":"Matlab\u57fa\u7840\u64cd\u4f5c\u7b14\u8bb0[2]-sym()\u3001vpa()\u3001int()"},"content":{"rendered":"\n

sym()<\/strong><\/p>\n\n\n\n

\u200e\u521b\u5efa\u7b26\u53f7\u53d8\u91cf\u3001\u8868\u8fbe\u5f0f\u3001\u529f\u80fd\u3001\u77e9\u9635\u200e<\/p>\n\n\n\n

sym()\u8bb2 \u7b26\u53f7\u53d8\u91cf\u3001\u8868\u8fbe\u5f0f\u3001\u529f\u80fd\u3001\u77e9\u9635\u200e \u4ee5\u6570\u5b66\u5f62\u5f0f\u521b\u5efa\u53d8\u91cf\u3002<\/p>\n\n\n\n

\u793a\u4f8b\u5982\u4e0b\uff1a\uff08\u622a\u53d6\u81eaCreate symbolic variables, expressions, functions, matrices – MATLAB sym – MathWorks \u4e2d\u56fd<\/a>\uff09<\/p>\n\n\n\n

\u200e\u521b\u5efa\u7b26\u53f7\u53d8\u91cf\u200e<\/strong><\/p>\n\n\n\n

\"\"
\u56fe1<\/figcaption><\/figure><\/div>\n\n\n\n

\u200e\u521b\u5efa\u7b26\u53f7\u77e2\u91cf\u200e<\/strong><\/p>\n\n\n\n

\"\"
\u56fe2<\/figcaption><\/figure><\/div>\n\n\n\n

\u200e\u521b\u5efa\u7b26\u53f7\u77e9\u9635\u200e<\/strong><\/p>\n\n\n\n

\"\"
\u56fe3<\/figcaption><\/figure><\/div>\n\n\n\n

\u200e\u521b\u5efa\u7b26\u53f7\u591a\u7ef4\u9635\u5217\u200e<\/strong><\/p>\n\n\n\n

\"\"
\u56fe4<\/figcaption><\/figure><\/div>\n\n\n\n

\u200e\u521b\u5efa\u7b26\u53f7\u6570\u5b57\u200e<\/strong><\/p>\n\n\n\n

\u200e\u5c06\u6570\u5b57\u503c\u8f6c\u6362\u4e3a\u7b26\u53f7\u6570\u5b57\u6216\u8868\u793a\u5f0f\u3002\u7528\u4e8e\u6b21\u8868\u8fbe\uff0c\u800c\u4e0d\u662f\u6574\u4e2a\u8868\u8fbe\uff0c\u4ee5\u83b7\u5f97\u66f4\u597d\u7684\u51c6\u786e\u6027\u3002\u5728\u6574\u4e2a\u8868\u8fbe\u5f0f\u4e0a\u4f7f\u7528\u662f\u4e0d\u51c6\u786e\u7684\uff0c\u56e0\u4e3a MATLAB \u9996\u5148\u5c06\u8868\u8fbe\u65b9\u5f0f\u8f6c\u6362\u4e3a\u6d6e\u52a8\u70b9\u6570\u5b57\uff0c\u4ece\u800c\u5931\u53bb\u51c6\u786e\u6027\u3002 \u4e0d\u80fd\u603b\u662f\u6062\u590d\u8fd9\u79cd\u4e22\u5931\u7684\u51c6\u786e\u6027\u3002<\/p>\n\n\n\n

\u200e<\/p>\n\n\n\n

\"\"
\u56fe5<\/figcaption><\/figure><\/div>\n\n\n\n

\u5269\u4e0b\u51e0\u79cd\u60c5\u51b5\u7701\u7565\u3002<\/p>\n\n\n\n

vpa()<\/strong><\/p>\n\n\n\n

\u200e\u53ef\u53d8\u7cbe\u5ea6\u7b97\u672f\uff08\u4efb\u610f\u7cbe\u5ea6\u7b97\u672f\uff09\u200eVariable-precision arithmetic (arbitrary-precision arithmetic) – MATLAB vpa – MathWorks \u4e2d\u56fd<\/a><\/p>\n\n\n\n

vpa()\u53ef\u4ee5\u628asym\u7c7b\u7684\u6807\u8bc6\u8f6c\u5316\u4f4d\u6d6e\u70b9\u6570\u3002<\/p>\n\n\n\n

\u793a\u4f8b\uff1a<\/p>\n\n\n\n

\"\"
\u56fe6<\/figcaption><\/figure><\/div>\n\n\n\n

int()<\/strong><\/p>\n\n\n\n

\u7528\u4e8e\u79ef\u5206<\/p>\n\n\n\n

\u7528\u6cd5\uff0c\u53c2\u8003\u81ea\uff1aDefinite and indefinite integrals – MATLAB int – MathWorks \u4e2d\u56fd<\/a><\/p>\n\n\n\n

F = int(expr<\/code><\/a>)<\/code> computes the indefinite integral of expr<\/code>. int<\/code> uses the default integration variable determined by symvar<\/code><\/a>(expr,1<\/code>). If expr<\/code> is a constant, then the default integration variable is x<\/code>.<\/p>\n\n\n\n

\u53c2\u6570\u53ea\u6709\u51fd\u6570expr\u7684\u79ef\u5206\uff0c\u9ed8\u8ba4\u79efx<\/p>\n\n\n\n

F = int(expr<\/code><\/a>,var<\/code><\/a>)<\/code> computes the indefinite integral of expr<\/code> with respect to the symbolic scalar variable var<\/code>.<\/p>\n\n\n\n

\u51fd\u6570expr\u79efvar<\/p>\n\n\n\n

F = int(expr<\/code><\/a>,a<\/code><\/a>,b<\/code><\/a>)<\/code> computes the definite integral of expr<\/code> from a<\/code> to b<\/code>. int<\/code> uses the default integration variable determined by symvar<\/code><\/a>(expr,1<\/code>). If expr<\/code> is a constant, then the default integration variable is x<\/code>.<\/p>\n\n\n\n

int(expr,[a b])<\/code> is equivalent to int(expr,a,b)<\/code>.<\/p>\n\n\n\n

\u4ecea\u5230b\u79efexpr\uff0c\u9ed8\u8ba4\u79efx<\/p>\n\n\n\n

F = int(expr<\/code><\/a>,var<\/code><\/a>,a<\/code><\/a>,b<\/code><\/a>)<\/code> computes the definite integral of expr<\/code> with respect to the symbolic scalar variable var<\/code> from a<\/code> to b<\/code>.<\/p>\n\n\n\n

int(expr,var,[a b])<\/code> is equivalent to int(expr,var,a,b)<\/code>.<\/p>\n\n\n\n

\u51fd\u6570expr\u4ecea\u5230b\u79efvar<\/p>\n\n\n\n

\u793a\u4f8b\uff1a<\/p>\n\n\n\n

\"\"
\u56fe7<\/figcaption><\/figure><\/div>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

sym() \u200e\u521b\u5efa\u7b26\u53f7\u53d8\u91cf\u3001\u8868\u8fbe\u5f0f\u3001\u529f\u80fd\u3001\u77e9\u9635\u200e …<\/p>\n","protected":false},"author":1,"featured_media":214,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[2],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/scutvk.cn\/wp-content\/uploads\/2021\/11\/image-3.png","_links":{"self":[{"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/posts\/213"}],"collection":[{"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=213"}],"version-history":[{"count":3,"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/posts\/213\/revisions"}],"predecessor-version":[{"id":223,"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/posts\/213\/revisions\/223"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=\/wp\/v2\/media\/214"}],"wp:attachment":[{"href":"https:\/\/scutvk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=213"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=213"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/scutvk.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}