How can I use cross-correlation as a tool to align two signals in MATLAB?

load variable_file

X1=xcorr(s1,s2);   %compute cross-correlation between vectors s1 and s2

[m,d]=max(X1);      %find value and index of maximum value of cross-correlation amplitude

delay=d-max(length(s1),length(s2));   %shift index d, as length(X1)=2*N-1; where N is the length of the signals

figure,plot(s1)                                     %Plot signal s1

hold,plot([delay+1:length(s2)+delay],s2,'r');   %Delay signal s2 by delay in order to align them

grid on