misinterpolate

To misestimate an interpolated data value.

These codes invariably misinterpolated the temperature values between two somewhat separated data transects, but did reasonably well in fitting the data close to the transects themselves.

A bad spatial sampling of the field could in this case miss the focal minimum and misinterpolate the field.

To insert or introduce an incorrect value into the middle of something else.

Indeed there are numerous instances during the composition of Finnegans Wake where the hapless typists, confused by Joyce's conventions, misinterpolated additions into the text.

So much was crowded into the lessons that I would inadvertently misinterpolate the lindy with the fox-trot, the rhumba with the waltz.