subplot(2,2,4) plot(x,y4) MATLAB Scripts are saved as so-called m files (file extension is m) Test the function afterwards in the Command window as follows:
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can then be used and reused just like intrinsic MATLAB functions A function file is a file with an Rounding and Remainder Function Description ceil(x) round x
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subplot(2,2,4) plot(x,y4) MATLAB Scripts are saved as so-called m files (file extension is m) Test the function afterwards in the Command window as follows:
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Scripts and User-defined Functions with MATLABHans-Petter Halvorsenhttps://www.halvorsen.blog
Scripts (m-files)Script EditorWhen using the Script Editor, you may create several lines of code and execute all in one batch. You can easily do changes in your code, create comments, etc.Run the Scriptclearclcx=0:0.1:2*pi;y=sin(x);y2=cos(x);y3=tan(x);y4=atan(x);%plotting sin(x)subplot(2,2,1)plot(x,y)%plotting cos(x)subplot(2,2,2)plot(x,y2)%plotting tan(x)subplot(2,2,3)plot(x,y3)%plotting atan(x)subplot(2,2,4)plot(x,y4)MATLAB Scripts are saved as so-called .m files (file extension is .m)
Script (M-file)•Create a Script (M-file) where you create a vector with random data and find the average and the standard deviation•Run the Script from the Command window.
x = rand(10, 1)mean(x)std(x)x = 0.8147 0.9058 0.1270 0.9134 0.6324 0.0975 0.2785 0.5469 0.9575 0.9649ans = 0.6239ans = 0.3459
User-defined FunctionsYou Create the Function in the EditorMATLAB contains hundreds of built-in functions, but very often you need to create your own functionsYou Use the Function in the Command Window or in a Script InputReturn valuefunctionoutput = function_name(input)
User-defined function•Create a function calc_average()that finds the average of two numbers.•Test the function afterwards in the Command window as follows:>>x=2;>>y=4;>>z=calc_average(x,y)
>> z=calc_average(x,y)z =3We test the function in the Command windowUser-defined function II•Create a function circlethat finds the area in a circle based on the input parameter r (radius).•Run and test the function in the Command window.=!
function A = circle(r)A=pi*r*r;We define the function:Testing the function from the Command window:>> circle(1)ans=3.1416>> circle(2)ans=12.5664>> r=4;>> A=circle(r)A =50.2655
Hans-Petter HalvorsenUniversity of South-Eastern Norwaywww.usn.noE-mail: hans.p.halvorsen@usn.noWeb: https://www.halvorsen.blog
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