{"id":518,"date":"2011-05-16T19:08:59","date_gmt":"2011-05-16T19:08:59","guid":{"rendered":"https:\/\/blogs.mathworks.com\/videos\/2011\/05\/16\/using-logical-indexing-to-plot-points-meeting-a-specific-criteria-only\/"},"modified":"2011-05-16T19:08:59","modified_gmt":"2011-05-16T19:08:59","slug":"using-logical-indexing-to-plot-points-meeting-a-specific-criteria-only","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/videos\/2011\/05\/16\/using-logical-indexing-to-plot-points-meeting-a-specific-criteria-only\/","title":{"rendered":"Using logical indexing to plot points meeting a specific criteria only."},"content":{"rendered":"If you have a vector of coordinate for a set of points, you might want to differentiate those points.  To do that a concept called logical indexing will help you pull out a subset of those points easily.\r \r Here is a quick example (See the second video for more details)\r \r <pre><code>\r >> L = logical([0 1 0 1])\r \r L =\r \r      0     1     0     1\r \r >> a = [1 2 3 4]\r \r a =\r \r      1     2     3     4\r \r >> a(L)\r \r ans =\r \r      2     4\r <\/code><\/pre>\r \r \r <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=\"3906939755001\" 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>\r \r <\/br> The above video made practical use of logical indexing.  The video below shows logical indexing in a more academic treatment.\r \r <\/br> <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=\"3877438792001\" 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>\r <\/br>","protected":false},"excerpt":{"rendered":"<div class=\"thumbnail thumbnail_asset asset_overlay video\"><a href=\"https:\/\/blogs.mathworks.com\/videos\/2011\/05\/16\/using-logical-indexing-to-plot-points-meeting-a-specific-criteria-only\/?dir=autoplay\"><img decoding=\"async\" src=\"https:\/\/cf-images.us-east-1.prod.boltdns.net\/v1\/static\/62009828001\/5f1f0e7d-8be8-498e-b5de-027b827379e3\/704c9a02-26cb-4c9b-9378-c08f208732c2\/1280x720\/match\/image.jpg\" onError=\"this.style.display ='none';\"\/>\n      <div class=\"overlay_container\">\n      <span class=\"icon-video icon_color_null\"><time class=\"video_length\">2:37<\/time><\/span>\n      <\/div>\n      <\/a><\/div><p>If you have a vector of coordinate for a set of points, you might want to differentiate those points.  To do that a concept called logical indexing will help you pull out a subset of those points&#8230; <a class=\"read-more\" href=\"https:\/\/blogs.mathworks.com\/videos\/2011\/05\/16\/using-logical-indexing-to-plot-points-meeting-a-specific-criteria-only\/\">read more >><\/a><\/p>","protected":false},"author":68,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[17,20],"tags":[],"_links":{"self":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/518"}],"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\/68"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/comments?post=518"}],"version-history":[{"count":0,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/posts\/518\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/media?parent=518"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/categories?post=518"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/videos\/wp-json\/wp\/v2\/tags?post=518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}