Changing frequency of given data set

I have data set (voltage vs time) of a signal with frequency 450Hz and number of sample is 10000. How can I change frequency of a that data set using Matlab and also add phase shift with that signal?

Answer 1

[Chaitanya Mallela]

Consider voltage vector x

Let the frequency shift be delta_f and phase shift be delta_p

N = 10000 % number of samples

To change the frequency of the data set, multiply complex exponential with x

y = exp(i*2*pi*[1:N]*delta_f*1/N).*x

Observe the fft plot with new frequency

plot(abs(fft(y)))

New frequency f_new = 450 + delta_f;

To add phase use circshift function on abs(y) shifted with delta_p

[md rashid]

Hi thanks for answering the question. But when I tried to run the program it shows error.

It says "Out of memory. Type "help memory" for your options". Do you know how to solve this issue?

[Chaitanya Mallela]

You can refer this link

https://www.mathworks.com/matlabcentral/answers/406845-out-of-memory-error