Hello i'm getting this error...can any one help me out?

Error using reshape; Size arguments must be real integers.

Error in Channel_behaviour (line 7); xsym = bin2dec(reshape(x,k,length(x)/k).','left-msb');% Convert the bits in x into k-bit symbols.

This is my code:

Answer 1

[Star Strider]

There is actually nothing to reshape anyway. Two of the reshape arguments are scalars (specifically ‘n’=256 and ‘k’=4, and since length(x)=1, the last size argument is going to be length(x)/k=1/4 which is not an acceptable size for a matrix or array.

I’m not really certain what you’re doing, but you might want to revise the documentation on randi. I believe you were expecting ‘x’ to be a vector.

[Prudhvi Muppalla]

Thank you for your answer star strider.can u please tell me which function can i use instead of randi to make it working.It will be a great help for me.I'm trying to get the OFDM channel estimation. Please see the attached file for the code.

[Star Strider]

The randi function will work, and do exactly what you want it to do. You just have to tell it. If you want a vector of 20 digits from 0-9, ‘x’ becomes:

x = randi([0 9],1,20);

See the documentation on randi for details.