How can I interpolate rows in an array with a loop?

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Paola il 17 Ago 2021
Risposto: Yazan il 18 Ago 2021
Hi I would like to interpolate rows of an array with a loop. I wrote this code but it doesn't work, can you help me to solve this problem? Thanks
for i=1:size(A,1)

Risposte (1)

Yazan il 18 Ago 2021
if A is an array, then Matlab will throw an error, as you are using curly braces for indexing.
Below is a demo on how to user interp1
t0 = 1:1:10;
% create a matrix contaning data sampled at step = 1;
t = repmat(t0, [3,1]);
x = (1:3)';
A = x.*t;
% assume you need to sample at a step = 0.5
tq = t0(1):0.5:t0(end);
% interpolate every row linearly and save results in B
B = nan(size(A,1), length(tq));
for j=1:size(A,1)
B(j, :) = interp1(t0, A(j,:), tq);
% plot one row of A and B
plot(tq, B(1,:)); hold on
plot(t0, A(1,:), 's'); grid minor
legend({'Interpolated data', 'Original data'})


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