Change values using repmat
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Hello everybody,
I have this code
input = '101110'
fs=8000
f0 = 800
duration = 0.1
timeseq=0:1/fs:strlength(input)*duration;
And I want to multiply each 1 of the input and each 0 with the following line.
cos(2*pi*f0*timeseq)
I want to do it without using loops like for, I think I should use fome matlab functions like repmat or repelem but I don't know how they need to be used.
Thank you
采纳的回答
Ameer Hamza
2020-10-26
I think you are trying to do something like this
input = '101110';
input_num = input - '0';
fs=8000;
duration = 0.1;
timeseq=0:1/fs:strlength(input)*duration-1/fs;
tone_frequency = 2;
input_vec = repelem(input_num, 1, fs*duration);
out = cos(2*pi*tone_frequency*timeseq).*input_vec;
2 个评论
Mireia Boneta Camí
2020-10-26
Hi Ameer, why do you have to put -1/fs in the timeseq?
Ameer Hamza
2020-10-26
So that the number of elements in timeseq are exact multiple of strlength(input)*duration.
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