plot x=f(y)
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If I have a function given as x =f(y), how can I plot x as independent variable (x axsis) and y dependent variable (y axsis). I also need to control the range of both x and y.
x=y/(0.5+cos3y)
1 个评论
Walter Roberson
2020-3-5
Could you confirm that you need to do this inside a mex routine? Or are you trying to use MATLAB Coder? I am trying to figure out what the Product tag you used implies for this.
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Walter Roberson
2020-3-5
0 个投票
In MATLAB, cos3y would be written as cos(3*y)
In MATLAB, if y is a vector, instead of using / you should use ./ -- so y./something instead of y/something
You have an implicit plot, so you should have a look at fimplicit()
7 个评论
Mariam
2020-3-5
Walter Roberson
2020-3-5
编辑：Walter Roberson
2020-3-5
In MATLAB, most of the time you need to express multiplication using the .* operator instead of the * operator.
You have an implicit plot, so you should have a look at fimplicit()
Hint:
If A(x,y) = B(x,y) then A(x,y)-B(x,y) = 0 must be true, and expression being 0 is what fimplicit() draws.
Mariam
2020-3-5
Walter Roberson
2020-3-5
Which MATLAB release are you using? fimplicit() was added in R2016b.
Mariam
2020-3-5
Walter Roberson
2020-3-5
In R2009a, you can use
ezplot(f, [0 1e4 0 1e4])
Mariam
2020-3-6
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