Question: Adjust values in a matrix


I want to adjust values in a matrix. In the example matrix you will find some measurement errors (values around -4000 or 1). But these are definitely measurement errors. Is there any possibility to adjust these values to the surrounding values (~1500) in an interpolation. Can someone help me how I can do this with maple?

Ps.: the matrix is exported from maple into .xls


Thank you very much!

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