How to extend x range of pwelch

Hi, I'm wondering how to extend the pwelch x range of a function. by default, if you were to plot pwelch(X), the default range is from 0-1. Is there any way to change this range to calculate the normalized frequency from, say, 0-10? Thanks.

Answer 1

[Torsten]

Multiply the result from pwelch by 10. :-)

[Anthony Koning]

And in terms of plotting that, would that just be 10*pwelch(X), or would it be a little more nuanced such as

y = 10*pwelch(X)

t = 0:0.1:10

plot(t,y)?

[Torsten]

Forget my answer. I thought you only refer to rescale the y-range.

I think you have to explain in more detail what you want to plot on the x and y axes.

[Anthony Koning]

No, I'm looking to rescale the x range of the pwelch function. Essentially, I have a signal that is using a pwelch command to identify the power density spectrum. The default value for the x-axis, normalized frequency (or Hz) goes from 0-1. I would like to know how to extend the range of this to show the Hz from 0-10, without changing the spectrum's power values (yaxis). Ysing this picture as an example, I'd like the x range to be multiplied by 10, without changing the y range. This is obvious a crude example, and the graphs liekly wouldn't look identical with only a different x scale, but I hope this helps clarify what I'm looking for.

[Star Strider]

The frequency axis goes from DC (0 Hz) to π radians or the Nyquist frequency (half the sampling frequency) if that information is provided. The only way to change the frequency axis would be to resample the signal to a higher sampling frequency, in this instance, 10 times the original sampling frequency.