Error using conv2 First and second arguments must be single or double

I'm running the script below to prove the identity property of linear convolution ( x1(n)*d(n-n0)= x1(n-n0) )

However when I run the script I get the following errors

"Error using conv2 First and second arguments must be single or double.

Error in conv (line 38) c = conv2(a(:),b(:),shape);

Error in conv_m (line 10) ny = nyb:nye; y = conv(x,h);"

I think this has something to do with the matrix generated by the impseq function being "logical" instead of "double."

Any suggestions?

    %Identity    %x1(n)*d(n-n0)= x1(n-n0)
nx=[-50:50]; x1=cos(pi*nx/4).*(stepseq(-5,-50,50)- stepseq(20,-50,50));
%x1(n)*delta(n-n0)
[y4,m4]=impseq(5,-50,50);
[y5,m5]=conv_m(x1,nx,y4,m4);
subplot(2,2,3);stem(m5,y5,'k');title('x1*delta(nn0)'); xlabel('m');
[y1,m1]=sigshift(x1,nx,10);
subplot(2,2,4);stem(m4,y4,'k');title('x1(nn0)]');xlabel('m');
axis([-40 60 -10 20]);

Answer 1

[Matt J]

You can convert logicals to single or double using the commands single() or double().

[Godwin Ikape]

How do you convert a logical to single or double? Do I add the "single()" at the end of the operation or something?

Example:

a = r<p single();

[Godwin Ikape]

EDIT: Nevermind, I think I figured it out

a = single(r<p);