{"id":437,"date":"2014-06-23T14:59:15","date_gmt":"2014-06-23T11:59:15","guid":{"rendered":"http:\/\/www.sjut.org\/math\/?p=437"},"modified":"2014-06-24T07:18:55","modified_gmt":"2014-06-24T04:18:55","slug":"mat113-2014-06-23","status":"publish","type":"post","link":"http:\/\/www.sjut.org\/math\/index.php\/mat113-2014-06-23\/","title":{"rendered":"MAT113 Workshop 23th & 24th June"},"content":{"rendered":"

In this workshop, we will start with a pre-defined set of data and a pre-defined script in order to repeat the Thermistor Calibration done before with the spreadsheet.<\/p>\n

In another tab or window of your browser, open up www.plotshare.com<\/a>. In the Options<\/em> section enter the appropriate text to prove to plotshare that you are human.<\/p>\n

Copy \/ paste the script below into the Gnuplot-Script box on plotshare, then Add external data<\/em> and copy \/ paste the data at the bottom of the page into the text box ExtData1<\/em>.<\/p>\n

Click Execute<\/em> to fit the calibration curve and plot the end result. That’s all it takes to do curve fitting with Gnuplot. Modify the label and ranges in the script and use your own data to help in working with lab practicals.<\/p>\n

Gnuplot-Script:<\/strong><\/p>\n

\r\n# =========== Proposed function ===============\r\ng(x) = b0 + b1 * log(x) + b2 * (log(x)**2) + b3 * (log(x)**3 )\r\n# ========================================\r\n#\r\n# ==== Fitting transformed data ==========\r\nset autoscale\r\nfit g(x) 'ExtData1' using 3:(1\/($1+273.15)) via b0, b1, b2, b3\r\n# ========================================\r\n#\r\n# ======== Plotting the results ==========\r\nT(x) = 1\/g(x) - 273.15\r\nset xrange [80:150]\r\nset yrange [-50:130]\r\nset xlabel 'R, Ohms'\r\nset ylabel 'T, degrees C'\r\nset title 'RTD calibration curve'\r\nset key inside bottom right box 3\r\nset linetype 1 lw 2 lc rgb \"black\"\r\nset linetype 2 lw 2 lc rgb \"red\"\r\nset pointsize 2\r\nplot 'ExtData1' using 3:1 title 'Calibration Data', T(x) title 'Calibration Curve'\r\n# ========================================\r\n<\/code><\/pre>\n
 <\/p>\n
ExtData1:<\/strong><\/p>\n
\r\n# T,C T,F R,Ohms\r\n-50 -58 80.306\r\n-40 -40 84.271\r\n-30 -22 88.222\r\n-20 -4 92.160\r\n-10 14 96.086\r\n0 32 100.000\r\n10 50 103.903\r\n20 68 107.794\r\n25 77 109.735\r\n30 86 111.673\r\n40 104 115.541\r\n50 122 119.397\r\n60 140 123.242\r\n70 158 127.075\r\n80 176 130.897\r\n90 194 134.707\r\n100 212 138.506\r\n110 230 142.293\r\n120 248 146.068\r\n130 266 149.832\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
In this workshop, we will start with a pre-defined set of data and a pre-defined script in order to repeat the Thermistor Calibration done before with the spreadsheet. In another […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/posts\/437"}],"collection":[{"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/comments?post=437"}],"version-history":[{"count":7,"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/posts\/437\/revisions"}],"predecessor-version":[{"id":444,"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/posts\/437\/revisions\/444"}],"wp:attachment":[{"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/media?parent=437"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/categories?post=437"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sjut.org\/math\/index.php\/wp-json\/wp\/v2\/tags?post=437"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}