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How to make an anonymous function whose variable is itself a function of another variable?

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Salman 2014-5-23

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https://ww2.mathworks.cn/matlabcentral/answers/130747-how-to-make-an-anonymous-function-whose-variable-is-itself-a-function-of-another-variable

回答： George Papazafeiropoulos 2014-5-23

采纳的回答： George Papazafeiropoulos

Let's say i have an anonymous function defined in the following manner

z = @(x) cos(phi).^2 + 4*sin(phi).^2 and phi is defined in the following way

phi = @(x) x.^3 + 4*x.^2 + x +3

I have been trying to do this but when i call the function z in the following way, an error pops up

z(3)

Is something wrong in the syntax?

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George Papazafeiropoulos 2014-5-23

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z = @(phi) cos(phi).^2 + 4*sin(phi).^2

phi = @(x) x.^3 + 4*x.^2 + x +3

z(phi(3))

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