Error in resampling function

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Cheng-Ling Kuo
Cheng-Ling Kuo on 26 Jan 2024
Commented: Paul on 29 Jan 2024
I try to change sampling rate from 4.8kHz to 5kHz
fs=4800;
t1 = 0:1/fs:1;
x = sin(t1);
x2=resample(x,4800,5000);
But I get error
Incorrect number or types of inputs or outputs for function resample.
How to solve it?
Even I used
[p,q]=rat(5000/4800)
x3=resample(x,p,q);
It seems the same error!
  7 Comments
Cheng-Ling Kuo
Cheng-Ling Kuo on 29 Jan 2024
Edited: Cheng-Ling Kuo on 29 Jan 2024
I got the following message.
fs=4800;
t1 = 0:1/fs:1;
x = sin(t1);
class(x)
which resample(x,4800,5000)
ans =
'double'
'resample(x,4800,5000)' not found.
Paul
Paul on 29 Jan 2024
So, if trying to execute that resample command it resolves to the timeseries method. But the which command doesn't find anything. No idea what could be the problem.

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Accepted Answer

Sulaymon Eshkabilov
Sulaymon Eshkabilov on 28 Jan 2024
If you want to use fs = 5000 Hz, then the command syntax has to be resample(x_siganl, time, fs_new) This is how it should be done:
fs=4800;
t1 = 0:1/fs:1;
x = sin(t1);
fs_new = 5e3;
x2=resample(x,t1,fs_new);
which resample(x,t1,fs_new)
/MATLAB/toolbox/signal/signal/resample.m
scatter(t1, x)
hold on
t2 = 0:1/fs_new:1;
scatter(t2, x2(1:end-1))
legend('Original Data', 'Resampled Data', 'Location', 'Best')
grid on
xlabel('t')
ylabel("x & x_{resampled}")
%% View a small portion of the data:
figure
scatter(t1, x)
hold on
t2 = 0:1/fs_new:1;
scatter(t2, x2(1:end-1))
legend('Original Data', 'Resampled Data', 'Location', 'Best')
grid on
xlabel('t')
ylabel("x & x_{resampled}")
xlim([0.95 1])

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