How to use sinc function in a piecewise operation

I am getting an error that reads, "Check for missing argument or incorrect argument data type in call to function 'sinc' ". I am trying to implement this piecewise function, when and 0 otherwise. This is what I am doing,

t = 0: 0.0001: 0.1;
m = (sinc(100*t))*(abs(t) <= to);

Answer 1

[David Hill]

t = -.1: 0.0001: 0.1;
t0=.09;
m = (sinc(100*t)).*(abs(t) <= t0);
plot(t,m);

[Reindorf Addo]

Unfortunately, this method still does not work.

[David Hill]

What is not working? It is working fine for me. Are you getting the plot, or do you think the plot is wrong?

[Reindorf Addo]

I am not getting the plot, I am still getting the same error as before. I copied and pasted your code exactly.

[David Hill]

Do you have the Signal Processing Toolbox? If not, you will have to program sinc.

t = -.1: 0.0001: 0.1;
t=t(t~=0);
t0=.09;
m = (sin(pi*100*t))./(pi*100*t).*(abs(t) <= t0);
plot(t,m);

[Reindorf Addo]

Thanks, that seemed to be the problem, it works fine with the Signal Processing Toolbox.