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

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

Answer 1

[KSSV]

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')