{"id":2415,"date":"2009-04-17T11:59:35","date_gmt":"2009-04-17T11:59:35","guid":{"rendered":"https:\/\/blogs.mathworks.com\/pick\/2009\/04\/17\/interactive-waveform-generator\/"},"modified":"2009-04-17T11:59:35","modified_gmt":"2009-04-17T11:59:35","slug":"interactive-waveform-generator","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/pick\/2009\/04\/17\/interactive-waveform-generator\/","title":{"rendered":"Interactive Waveform Generator"},"content":{"rendered":"<div xmlns:mwsh=\"https:\/\/www.mathworks.com\/namespace\/mcode\/v1\/syntaxhighlight.dtd\" class=\"content\">\r\n   <p><a href=\"https:\/\/www.mathworks.com\/matlabcentral\/fileexchange\/authors\/15007\">Jiro<\/a>'s pick this week is <a href=\"https:\/\/www.mathworks.com\/matlabcentral\/fileexchange\/23526-waveform-generator-gui\"><tt>Waveform Generator<\/tt><\/a> by <a href=\"https:\/\/www.mathworks.com\/matlabcentral\/fileexchange\/authors\/49003\">Maxim Vedenyov<\/a>.\r\n   <\/p>\r\n   <p>I really like the concept of this tool. Sometimes, I have a need to create data for demonstration or for testing of a function.\r\n      For that, I often use the function <tt>rand<\/tt> or superimpose multiple <tt>sin<\/tt> and <tt>cos<\/tt> functions.\r\n   <\/p>\r\n   <p>Well, wouldn't it be great if I could graphically create my data? That's exactly what Waveform Generator allows me to do.<\/p>\r\n   <p><img decoding=\"async\" vspace=\"5\" hspace=\"5\" src=\"https:\/\/blogs.mathworks.com\/images\/pick\/wavegen.png\"> <\/p>\r\n   <p>By moving the green control points, I can create a single cycle of any arbitrary waveform. The actual application for this\r\n      tool is audio synthesis. The constructed waveform can be played and saved as a wav file.\r\n   <\/p>\r\n   <p>This has inspired me to create a general purpose data generation tool. I'll post it on the File Exchange once I create it\r\n      (unless someone beats me to it!)\r\n   <\/p>\r\n   <p><a href=\"https:\/\/blogs.mathworks.com\/pick\/?p=2415#respond\">Comments<\/a>?\r\n   <\/p><script language=\"JavaScript\">\r\n<!--\r\n\r\n    function grabCode_9e098cb7c1234510924cf878225134b9() {\r\n        \/\/ Remember the title so we can use it in the new page\r\n        title = document.title;\r\n\r\n        \/\/ Break up these strings so that their presence\r\n        \/\/ in the Javascript doesn't mess up the search for\r\n        \/\/ the MATLAB code.\r\n        t1='9e098cb7c1234510924cf878225134b9 ' + '##### ' + 'SOURCE BEGIN' + ' #####';\r\n        t2='##### ' + 'SOURCE END' + ' #####' + ' 9e098cb7c1234510924cf878225134b9';\r\n    \r\n        b=document.getElementsByTagName('body')[0];\r\n        i1=b.innerHTML.indexOf(t1)+t1.length;\r\n        i2=b.innerHTML.indexOf(t2);\r\n \r\n        code_string = b.innerHTML.substring(i1, i2);\r\n        code_string = code_string.replace(\/REPLACE_WITH_DASH_DASH\/g,'--');\r\n\r\n        \/\/ Use \/x3C\/g instead of the less-than character to avoid errors \r\n        \/\/ in the XML parser.\r\n        \/\/ Use '\\x26#60;' instead of '<' so that the XML parser\r\n        \/\/ doesn't go ahead and substitute the less-than character. \r\n        code_string = code_string.replace(\/\\x3C\/g, '\\x26#60;');\r\n\r\n        author = 'Jiro Doke';\r\n        copyright = 'Copyright 2008 The MathWorks, Inc.';\r\n\r\n        w = window.open();\r\n        d = w.document;\r\n        d.write('<pre>\\n');\r\n        d.write(code_string);\r\n\r\n        \/\/ Add author and copyright lines at the bottom if specified.\r\n        if ((author.length > 0) || (copyright.length > 0)) {\r\n            d.writeln('');\r\n            d.writeln('%%');\r\n            if (author.length > 0) {\r\n                d.writeln('% _' + author + '_');\r\n            }\r\n            if (copyright.length > 0) {\r\n                d.writeln('% _' + copyright + '_');\r\n            }\r\n        }\r\n\r\n        d.write('<\/pre>\\n');\r\n      \r\n      d.title = title + ' (MATLAB code)';\r\n      d.close();\r\n      }   \r\n      \r\n-->\r\n<\/script><p style=\"text-align: right; font-size: xx-small; font-weight:lighter;   font-style: italic; color: gray\"><br><a href=\"javascript:grabCode_9e098cb7c1234510924cf878225134b9()\"><span style=\"font-size: x-small;        font-style: italic;\">Get \r\n            the MATLAB code \r\n            <noscript>(requires JavaScript)<\/noscript><\/span><\/a><br><br>\r\n      Published with MATLAB&reg; 7.8<br><\/p>\r\n<\/div>\r\n<!--\r\n9e098cb7c1234510924cf878225134b9 ##### SOURCE BEGIN #####\r\n%%\r\n% <https:\/\/www.mathworks.com\/matlabcentral\/fileexchange\/authors\/15007\r\n% Jiro>'s pick this week is\r\n% <https:\/\/www.mathworks.com\/matlabcentral\/fileexchange\/23526-waveform-generator-gui\r\n% |Waveform Generator|> by \r\n% <https:\/\/www.mathworks.com\/matlabcentral\/fileexchange\/authors\/49003\r\n% Maxim Vedenyov>.\r\n%\r\n% I really like the concept of this tool. Sometimes, I have a need to\r\n% create data for demonstration or for testing of a function. For that, I\r\n% often use the function |rand| or superimpose multiple |sin| and |cos|\r\n% functions.\r\n%\r\n% Well, wouldn't it be great if I could graphically create my data? That's\r\n% exactly what Waveform Generator allows me to do.\r\n%\r\n% <<wavegen.png>>\r\n%\r\n% By moving the green control points, I can create a single cycle of any\r\n% arbitrary waveform. The actual application for this tool is audio\r\n% synthesis. The constructed waveform can be played and saved as a wav\r\n% file.\r\n%\r\n% This has inspired me to create a general purpose data generation tool.\r\n% I'll post it on the File Exchange once I create it (unless someone beats\r\n% me to it!)\r\n%\r\n% <https:\/\/blogs.mathworks.com\/pick\/?p=2415#respond Comments>?\r\n##### SOURCE END ##### 9e098cb7c1234510924cf878225134b9\r\n-->","protected":false},"excerpt":{"rendered":"<p>\r\n   Jiro's pick this week is Waveform Generator by Maxim Vedenyov.\r\n   \r\n   I really like the concept of this tool. Sometimes, I have a need to create data for demonstration or for testing of a... <a class=\"read-more\" href=\"https:\/\/blogs.mathworks.com\/pick\/2009\/04\/17\/interactive-waveform-generator\/\">read more >><\/a><\/p>","protected":false},"author":35,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[12,16],"tags":[],"_links":{"self":[{"href":"https:\/\/blogs.mathworks.com\/pick\/wp-json\/wp\/v2\/posts\/2415"}],"collection":[{"href":"https:\/\/blogs.mathworks.com\/pick\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.mathworks.com\/pick\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/pick\/wp-json\/wp\/v2\/users\/35"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/pick\/wp-json\/wp\/v2\/comments?post=2415"}],"version-history":[{"count":0,"href":"https:\/\/blogs.mathworks.com\/pick\/wp-json\/wp\/v2\/posts\/2415\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.mathworks.com\/pick\/wp-json\/wp\/v2\/media?parent=2415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/pick\/wp-json\/wp\/v2\/categories?post=2415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/pick\/wp-json\/wp\/v2\/tags?post=2415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}