Hello, I have a 3-dimensional function f(x1,x2,x3)=x1^2+x2^2+x3^2. (x1,x2,x3) is a vector with components x1, x2 and x3. Therefore my input is a matrix including these vectors. I need to approximate this function and search for a matlab-function like smoothingspline=smoothingFunction(matrx with input values,function f,smoothingparam_lambda) ; As output of this function I expect set of values from the approximated function for each input vector. Does something like this exist in matlab?
Maybe the info that such kind of function already exists in R and is called tps() does help.
I would be very happy if you can help me to find this smoothing function in Matlab. Thank you in advance Kind Regards
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