What is the equation for Mexican hat wavelet defined by 'mexihat' function

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Palguna Gopireddy
Palguna Gopireddy 2022-3-30
评论： Palguna Gopireddy 2022-6-13
I am wondering what would be the equation for the Mexican hat wavelet defined by 'mexihat' function as its equation is not given in the discription. Not just this function, for some other functions also equations are not given.
I have done the following way, both are not equal and also I am unable to put [lb,ub] variables in the equation.
L=45;
alpha=2.5;
n=-(L-1)/2:(L-1)/2;
sigma=((L-1)/(2*alpha));
m=(1-(n/sigma).^2).*exp(-((n/sigma).^2)/2);
m=m.';
[m_r,x] = mexihat(-1,1,45);
m_r=m_r.';

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Maria Lucia Cardinali
编辑：Maria Lucia Cardinali 2022-6-9
If you open mexihat, you can see that the value is calculated as:
out2 = linspace(LB,UB,N); % wavelet support.
out1 = out2.^2;
out1 = (2/(sqrt(3)*pi^0.25)) * exp(-out1/2) .* (1-out1);
The formula is: , for .

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