Matlab , Error while plotting Heaviside. (Vectors must be the same length.)

Question

I am doing a problem on Hamming code in Matlab. I have generated a bit string of length 1190, for transmission. I am asked to display the string as a curve of step function.

After doing some researched i found that the Heaviside function can be used for display the bit string as unit step curve.

When I use the command fplot(heaviside(l_f),[0 ,10000]) , to plot the curve, where l_f is the bit string of length 1190 , I get this error

Error using fcnchk (line 106)

FUN must be a function, a valid string expression, or an inline function object.

Error in fplot (line 60) fun = fcnchk(fun);

Error in Untitled (line 88) fplot(heaviside(l_f),[0 ,10000])

When i display using Plot, ie plot(heaviside(l_f),[0 ,10000]) , I get the error

Error using plot Vectors must be the same length.

Error in Untitled (line 88) plot(heaviside(l_f),[0 ,10000])

Anyway to plot the bit string as a curve of step function ?

Answer 1

fplot(heaviside(l_f),[0 ,10000]) won't plot since fplot requires a function as first parameter. But in here it is a matrix. So use plot instead. Next, dimension of heaviside(l_f) will be 1x1190 and dimension of [0 ,10000] is 1x2 . So wont work since dimensions are different so use.

x=heaviside(l_f)
y=0:(10000+1)/length(l_f):10000;
plot(x,y);