Ploting of two vectors with different lengths

I have two vectors xvalues(42471x1) and yvalues(29125x1). I need to plot these two values as their respective axis but unfortunately cant use NaN as the first value and last value in x and y are corrosponding to each other. I was asked to use spline function can some one help me out on this?

[Askic V]

I suggest you to look interp1 function, or bet read this thread:

https://www.mathworks.com/matlabcentral/answers/488737-data-interp1-spline-and-cubic-method

Answer 1

[KSSV]

Let x be of size 42471x1 and y be of size 29125x1.

nx = length(x) ;
ny = length(y) ; 
% convert y to size of x 
id = linspace(1,nx,ny)' ; 
idi = linspace(1,nx,nx)' ;
yi = interp1(id,y,idi) ;  % you can specify your method here 
figure
hold on
plot(x,'r')
plot(yi,'.b')