{"id":2763,"date":"2016-11-17T13:52:44","date_gmt":"2016-11-17T18:52:44","guid":{"rendered":"https:\/\/blogs.mathworks.com\/videos\/?p=2763"},"modified":"2017-04-26T16:02:31","modified_gmt":"2017-04-26T21:02:31","slug":"debugging-a-tricky-look-up-table-indexing-problem","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/videos\/2016\/11\/17\/debugging-a-tricky-look-up-table-indexing-problem\/","title":{"rendered":"Debugging a Tricky Look-up Table Indexing Problem"},"content":{"rendered":"<p>This morning I needed to debug an issue with a regularly used script. The code was converting numerical columns in a table to strings or categoricals by using a lookup table. I had a few levels of indirection which made it more complicated to understand what was going on. Breaking a calculation up into small steps can often help in this situation.<\/p>\n<p>Features covered in this <a href=\"https:\/\/blogs.mathworks.com\/videos\/2015\/10\/29\/matlab-code-along-videos\/\">code-along<\/a> style video include:<\/p>\n<ul>\n<li>Structures, tables , categorical arrays and cell arrays<\/li>\n<li>Logical indexing<\/li>\n<\/ul>\n<p><div class=\"row\"><div class=\"col-xs-12 containing-block\"><div class=\"bc-outer-container add_margin_20\"><videoplayer><div class=\"video-js-container\"><video data-video-id=\"5362042005001\" data-video-category=\"blog\" data-autostart=\"false\" data-account=\"62009828001\" data-omniture-account=\"mathwgbl\" data-player=\"rJ9XCz2Sx\" data-embed=\"default\" id=\"mathworks-brightcove-player\" class=\"video-js\" controls><\/video><script src=\"\/\/players.brightcove.net\/62009828001\/rJ9XCz2Sx_default\/index.min.js\"><\/script><script>if (typeof(playerLoaded) === 'undefined') {var playerLoaded = false;}(function isVideojsDefined() {if (typeof(videojs) !== 'undefined') {videojs(\"mathworks-brightcove-player\").on('loadedmetadata', function() {playerLoaded = true;});} else {setTimeout(isVideojsDefined, 10);}})();<\/script><\/div><\/videoplayer><\/div><\/div><\/div><\/p>\n<p>Play the video in full screen mode for a better viewing experience.\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"thumbnail thumbnail_asset asset_overlay video\"><a href=\"https:\/\/blogs.mathworks.com\/videos\/2016\/11\/17\/debugging-a-tricky-look-up-table-indexing-problem\/?dir=autoplay\"><img decoding=\"async\" src=\"https:\/\/cf-images.us-east-1.prod.boltdns.net\/v1\/static\/62009828001\/1d3f0b40-6b9f-469d-83d3-fb70a12e1f28\/0d037331-b46a-42ea-aafa-e67e225f82eb\/160x90\/match\/image.jpg\" onError=\"this.style.display ='none';\"\/><\/p>\n<div class=\"overlay_container\">\n      <span class=\"icon-video icon_color_null\"><time class=\"video_length\">22:40<\/time><\/span>\n      <\/div>\n<p>      <\/a><\/div>\n<p>This morning I needed to debug an issue with a regularly used script. The code was converting numerical columns in a table to strings or categoricals by using a lookup table. I had a few levels of&#8230; <a class=\"read-more\" href=\"https:\/\/blogs.mathworks.com\/videos\/2016\/11\/17\/debugging-a-tricky-look-up-table-indexing-problem\/\">read more >><\/a><\/p>\n","protected":false},"author":133,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[27,4],"tags":[],"_links":{"self":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/2763"}],"collection":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/users\/133"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/comments?post=2763"}],"version-history":[{"count":5,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/2763\/revisions"}],"predecessor-version":[{"id":2941,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/2763\/revisions\/2941"}],"wp:attachment":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/media?parent=2763"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/categories?post=2763"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/tags?post=2763"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}