Change values using repmat

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

Answer 1

[Ameer Hamza]

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;

[Mireia Boneta Camí]

Hi Ameer, why do you have to put -1/fs in the timeseq?

[Ameer Hamza]

So that the number of elements in timeseq are exact multiple of strlength(input)*duration.