Change values using repmat

9 次查看（过去 30 天）
Carlos Pérez
Carlos Pérez 2020-10-26
评论： Ameer Hamza 2020-10-26
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

请先登录，再回答此问题。

采纳的回答

Ameer Hamza
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
Mireia Boneta Camí 2020-10-26
Hi Ameer, why do you have to put -1/fs in the timeseq?
Ameer Hamza
Ameer Hamza 2020-10-26
So that the number of elements in timeseq are exact multiple of strlength(input)*duration.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 MATLAB 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by