How to plot parametric curve

I am trying to use matlab code for filters ,how can change the curve from ellipse to an astrioid

3 个评论

hello
I don't understand the connection between an elliptical filter and an "astrioid " ??
inplace of ellipse equation i need the equation of astriod x^2/3+y^2/3=a^2/3
Please do not name your own function ‘filter’. That ‘overshadows’ a useful MATLAB function and will render the MATLAB function useless.

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