How to smooth a contour plot using the low pass filter

Here I am attaching a data and the code I wrote to make a contour plot.Now I want to make the contour plot smooth using a low pass filter.Can you please make the data pass through a low pass filter and smooth the contour? ?

Answer 1

[Bjorn Gustavsson]

Since your narrow structure is slant relative to your grid this will be difficult. The TriScatteredInterp with the 'natural' method gave better results. For filtering of the contour-lines care has to be taken - it is not a given that the most naively filtered contourlines will not cross. There is a contour-line-smoother at the file exchange:

contour-line-smoothing

HTH