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How can I interpolate

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Gustavo Caldeira
Gustavo Caldeira le 13 Juil 2017
Clôturé : MATLAB Answer Bot le 20 Août 2021
Hi everybody I'm trying to create some tools to help analyze my measurements and I need some help. Here's my problem: Sometimes I measure some variables with different frequencies for instance, 2 and 5Hz, and now I want to interpolate the variable with the least row numbers in order to make this variable with the same row numbers as the variable with the most row numbers. I want this tool to automatically "recognize" which variables have less number, interpolate them and finally assign them to original variable with the interpolated values. Any suggestions? Thanks!

Réponses (1)

dbmn le 14 Juil 2017
Try to include some of the following functions in your code
% This allows you to "count" the number of elements in your variable
numel(x(:,1)); numel(x(1,:))
% use that if you just want to count the number of element in a row or column vector of your data
And for the interpolation part use
x_new_short = x_long;
y_new_short = interp1(x_short, y_short, x_new_short);
So basically what you want to do is
  1. Figure out which Element is longer/shorter using numel
  2. Interpolate the shorter element to the long size using interp1
Try to write your own code and post it here, if you are still having trouble...

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