How to create a function with multiple calculations
显示 更早的评论
I have matlab code with 3 different calculations and I am unsure how to put it into a function (I want to solve the code using a function rather than have the calculations embedded in the code.)
a = sqrt((x1-x2)^2+(y1-y2)^2);
b = sqrt((x2-x3)^2+(y2-y3)^2);
c = sqrt((x1-x3)^2+(y1-y3)^2);
s=(a+b+c)/2;
k=sqrt(s.*(s-a).*(s-b).*(s-c));
采纳的回答
So I think you're looking for something like this
function [k] = myawesomefunction(x1,x2,x3,y1,y2,y3)
%MYAWESOMEFUNCTION with 6 input arguments x1, x2, x3, y1, y2, y3 and 1
%output argument k
a = sqrt((x1-x2)^2+(y1-y2)^2); b = sqrt((x2-x3)^2+(y2-y3)^2); c = sqrt((x1-x3)^2+(y1-y3)^2);
s=(a+b+c)/2;
k=sqrt(s.*(s-a).*(s-b).*(s-c));
end
If you also want the other variables a, b, c and s, you can just change it to this
function [a, b, c, s, k] = myawesomefunction(x1,x2,x3,y1,y2,y3)
You need to save the file with the same name as you gave the function, so in this case save it as 'myawesomefunction.m'
You can call your function in your main file like so:
myoutputK = myawesomefunction(12,23,45,56,78,91); %if you only have 1 output argument
[outputA,outputB,outputC,ouputS,outputK] = myawesomefunction(12,23,45,56,78,91); %if you have more than 1 output
3 个评论
Ahmed Raza Syed
2020-10-12
thanks a lot... i got the same problem and it helped me a lot
mahroo shiranzaei
2021-10-29
Hello and thanks for the great explanation.
Tony
2022-8-24
but if you are using myawesomefunction as a function from file in the problem-based Optimize live editor, outputB/outputC/outputS/outputK will not be considered in the problem. How to overcome this issue if I really would like to combine all my constraints in one function file?
更多回答（1 个）
James Tursa
2017-12-15
编辑：James Tursa
2017-12-15
Create a file called triangle_area.m on your path (e.g. in your working directory) and inside that function have this code:
% Put a description of the function here with purpose, syntax, etc.
function k = triangle_area(x1,y1,x2,y2,x3,y3)
% insert your calculation code here
end
You might consider changing your side distance formulas so they are vectorized for arrays of x1, y1, etc. E.g.,
a = sqrt((x1-x2).^2+(y1-y2).^2);
etc.
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