1-D interpolation along specified dimension

Hello, I have a tall 2-D matrix 6037500x44. I want perform an interpolation of all the 6037500 rows, using the 44 sample points and 301 query points. It is basically a 1-D interpolation along the second dimension. A for-loop row-by-row lasts forever. Can anybody suggest a more efficient way? Thanks!

 Accepted Answer

Not sure who's the independent x value but seems like the vectorized form should work
xout=interp1(x,data.',xq);
where x is the independent variable range commensurate with the range of the data over the 44 columns consistent with xq, the 301-length interpolating points.

2 Comments

This is exactly what I was looking for. Thanks a lot, Giorgio
What if its 3rd or higher dimentions? Is there ay way to avoid using permute, since its a bit ugly.

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on 10 Feb 2017

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on 14 Apr 2022

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