''' p = rational(xData,yData,x) Evaluates the diagonal rational function interpolant p(x) that passes through he data points ''' from numpy import zeros def rational(xData,yData,x): m = len(xData) r = yData.copy() rOld = zeros(m) for k in range(m-1): for i in range(m-k-1): if abs(x - xData[i+k+1])
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