How to use stepfun function

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>> I want to make this graph. time between -4 to 6. My code is t= -4:0.01:6 y1=stepfun(t,0)-2*stepfun(t-1,0)+stepfun(t-2,0); y2=stepfun(t,0)-stepfun(t-1,0);

is this right?

and i want to figure out this function

plot(y1); plot(y2);

is this right grammer?

I can't make this well... need help

Answer 1

[Jeong Min Shin]

You have to put ";" behind of your t= -4:0.01:6.