{"id":267,"date":"2008-11-08T10:24:10","date_gmt":"2008-11-08T09:24:10","guid":{"rendered":"http:\/\/www.walkingrandomly.com\/?p=267"},"modified":"2008-11-17T17:21:15","modified_gmt":"2008-11-17T16:21:15","slug":"another-symbolic-integral-that-matlab-2008b-cant-do","status":"publish","type":"post","link":"https:\/\/walkingrandomly.com\/?p=267","title":{"rendered":"Another Symbolic Integral that MATLAB 2008b can&#8217;t do"},"content":{"rendered":"<p>As more and more people start upgrading to MATLAB 2008b they are uncovering problems with the new Mupad symbolic engine.  The latest one was sent to me by Robert in the comments section of my <a href=\"https:\/\/www.walkingrandomly.com\/?p=178\">review of the new symbolic toolbox<\/a>.  In the <strong>old <\/strong>version of MATLAB (2008a and below) the symbolic toolbox has no problems at all with the following integral<br \/>\n<code><br \/>\nsyms x<br \/>\nint((sin(x))^2\/x,x)<\/code><\/p>\n<p>ans =<br \/>\n1\/2*log(x)-1\/2*cosint(2*x)<\/p>\n<p>but the new version using the Mupad engine simply cannot do anything with it:<br \/>\n<code><br \/>\nWarning: Explicit integral could not be found.<br \/>\n&gt; In sym.int at 64<br \/>\n<\/code><\/p>\n<p>Strictly speaking, this isn&#8217;t a bug at all but it does expose a limitation of the new system.  I have filed an incident report with The Mathworks just in case they are not aware of this issue so hopefully it will be improved in a future version.  Thanks to Robert for letting me know about this one.<\/p>\n<p>If you are a user of MATLAB (or any other piece of mathematical software for that matter) then feel free to let me know if you discover any more issues like this.  I will always inform the vendor once I have confirmed the problem but I am happy to keep your name to myself if that is what you prefer.<\/p>\n<p>If you enjoyed this article, feel free to <a href=\"http:\/\/feeds.feedburner.com\/WalkingRandomly\">click here to subscribe to my RSS Feed.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>As more and more people start upgrading to MATLAB 2008b they are uncovering problems with the new Mupad symbolic engine. The latest one was sent to me by Robert in the comments section of my review of the new symbolic toolbox. In the old version of MATLAB (2008a and below) the symbolic toolbox has no [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[4,11],"tags":[],"class_list":["post-267","post","type-post","status-publish","format-standard","hentry","category-math-software","category-matlab"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p3swhs-4j","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts\/267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=267"}],"version-history":[{"count":8,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts\/267\/revisions"}],"predecessor-version":[{"id":316,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts\/267\/revisions\/316"}],"wp:attachment":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}