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I am trying to create a plot of how certain elevation contours on a beach change over time. I have been using linterp for this so far. I want to interpolate a cross-shore (from dune to shoreline) position for a certain elevation from my data.

The issue I'm having is that when there is more than 1 occurrence of a particular contour on a particular profile linterp is picking up the landward most contour, but I want to know the location of the seaward most contour.

Any thoughts on a work around or another method of interpolation?

It was suggested to me that I try interp2, but I'm having trouble figuring out how to use that.

Thanks

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# Matlab: using linterp to interpolate beach contours

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