Plot a digital wave

Can someone help me to plot this digital wave in matlab?

(4/π) ∑ (1/k)sin(2π(kf)t) for k odd

[Adam]

You don't appear to have tried anything yourself yet. Show us what you have tried and people will help.

Probably someone will come and just do it all for you anyway, but at least show you made some effort and are asking questions on the bits you are stuck with.

If you don't know how to declare a variable in Matlab or search the help for examples of using the sin function you need to start with the basic documentation.

[Sajith Silva]

@Adam I've tried with this. But this doesn't give a digital signal

t=0:0.01:3;
f=1;
  for k = 1:2:M
      xsquare = (4/pi) + (1/k) * sin(2*pi*(k*f)*t);
  end

[Adam]

That gives me a digital signal so long as M is defined to something, e.g. 21.