How can i plot J(w)??

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Good mind
Good mind 2020-11-10
编辑： Good mind 2020-11-11
hello.
I want to plot this equation (MSE), exactly as in the image. how i can??
w is a vector, is the standard deviation of the noise, cross correlation vector between the desired signal and the noisy signal, and autocorrelation matrix.
Any values don't matter, only i want like the below graph.
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Good mind
Good mind 2020-11-10
编辑：Good mind 2020-11-11
J(w)= σ.*σ - (2.*w'.* P)+ (w'.* R.* w)
P (cross correlation), R (autocorrelation), σ (standard deviation), w(..) coefficients

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