Resampling a Vector of a specific length between 0 to 100% (ie 100 points)

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Louise
Louise on 22 Jul 2021
Answered: KSSV on 22 Jul 2021
Hello,
I've a Ground Reaction Force with a specific length from Heel Strike to Toe Off.
My aim is to "normalize" its length from 0 to 100%.
In other words, I would like that the length of this vector (1098), attached, will have a length of 100 points.
I try without success the spline, interp1 function.... Thanks in advance for your help,
Louise

Answers (1)

KSSV
KSSV on 22 Jul 2021
load('GRF.mat')
x = 1:length(GRF) ;
plot(x,GRF) ;
xi = linspace(1,length(GRF)) ;
GRFi = interp1(x,GRF,xi) ;
plot(x,GRF,'r')
hold on
plot(xi,GRFi,'.b')
legend('Original','Interpolated')

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