MATLAB: The acos funtion will not accept negagive numbers (e.g. -075) . WHY

acos problem

>> x = -1:.05:1;
plot(x,acos(x))
grid on
Subscript indices must either be real positive integers or logicals.

Best Answer

You have either defined a variable named "acos" or a variable named "plot"

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MATLAB: Subscript indices error when plotting

This is your problem:

   X(i,2) = Cv;
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Matlab is objecting to the fact that 'i' is being used as an index, but its value is not a positive integer. You need to revise your code so that the index value in X and Y is a positive integer.

MATLAB: Error in h5gPolarDecoder

Please check the LLR inputs provided to the decoder object - these need to be accurately scaled based on the noise variance modeled in the link. An incorrect scaling of the LLRs may result in this error from the object.

Often, the incorrect scaling is due to the lack of noise variance specification on the upstream demodulator (e.g. qamdemod, which assumes a default variance of 1) OR on the constellation power used by the demodulator.

We will update the object to yield a more informative error message.

Best Answer

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MATLAB: Subscript indices error when plotting

MATLAB: Error in h5gPolarDecoder

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