Using interp1 to interpolate y values

Hi,

I am attempting to interpolate my y values array instead of my x values.

Data: (y : 35x1534 double) (x: 35x1 double) (ny= 35x46 double)

newy = interp1(y,x,ny);

Hoping to have an output which is

newy : 35x46 double

However it returns with dimension errors. Is it possible to interpolate my y values to my ny values or would this not be possible?

Thanks.

[Image Analyst]

Why do you not have an x for every y? Wht are the ny values? Can you attach your matrices in a.mat file?

[Kelly]

I dont know if it is possible but I am trying make y the same dimensions as ny and I thought I could perhaps do this via interp1. I have attached the data.

[Cris LaPierre]

I don't think interpolating is going to work for you. Interpolation requires your data cover the same range of values just sampled at different intervals. Besides both having 35 rows, I don't see any sort of overlap in your data.

Here's your Y data (35x1534)

Here's your NY data (35x46)

Answer 1

[Cris LaPierre]

Since interpolating your data doesn't make sense to me, I suggest trying to downsample y instead.

idx46 = round(linspace(1,1534,46));
newy = y(:,idx46)

[Kelly]

Yes this has worked, thank you so much!