Centre and scale x data

I have to fit a curve for a custom equation with the curve obtained from my data. How can I centre and scale x data in this case?

[José-Luis]

Centre around what? Scale to what?

[Image Analyst]

Your question is vague. Attaching a screenshot would help.

[Sivakandan Mani]

Hi Jose-Luis,

I have 30 days of data with 1 hour time resolution, now I want centre for 5 days then do FFT. How to do that in matlab?

could you kindly suggest me the step, which need to be followed?

Thanks and regards,

Siva

Answer 1

[Star Strider]

You could always use the Z-score. It centers about the mean and scales by the number of standard deviations:

x = 10+50*randn(5,1);               % Create data
Zsc = @(x) (x - mean(x))./std(x);   % Z-score function
Zx = Zsc(x)                         % Z-scores of ‘x’