Error in snr calculation of denoised signal

Hello,

I'm loading audio signal (.wav) and adding awgn noise vector with snr = 5,

after that I'm using wden for denoising and I want to compute the snr of the denoised signal.

my code is:

[male, Fs1] = audioread('male.wav'); 

% Transpose audio signals
male = male.';

snr = 5; % SNR value in dB for adding awgn noise
n = randn(size(male))*std(male)/db2mag(snr); % AWGN noise
male_noisy = n + male;

[denoised,C,L,THR] = wden(male_noisy,'heursure','s','mln',3,'db8');
SNR = snr(denoised, n);

The error I'm getting is:

Index in position 1 is invalid. Array indices must be positive integers or logical values.

Why do I get that error?

Answer 1

[Image Analyst]

You forgot to give the line number it told you. Please put all the red text, not just a part of it. In particular, which of those lines threw the error.

Also, you didn't name your m-file, or any other m-file, snr.m did you? Because if it's this line

SNR = snr(denoised, n);

it might be thinking that snr is a function (meaning an m-file) or a matrix that you created. What does this say

which -all snr

See the FAQ for a thorough discussion.

https://matlab.fandom.com/wiki/FAQ#.22Subscript_indices_must_either_be_real_positive_integers_or_logicals..22