Z-axis Unit in Joint Time-Frequency Analysis

[KrzyFul2]

Dear All,

could you tell me which unit should be on z-axis in calculated JTFA spectrograms?

My data is time (s) vs. velocity (mm/s).

Thank you in advance.

BR,

Krzysztof 

[MateuszLoska]

Hi Krzysztof,

I'm not fully sure I understand your question, should it be: what is the unit returned by the function for z-axis?

Could you please please tell me exactly which function you use?

In the meantime, let me add a link which you may find helpful: http://www.ni.com/tutorial/3549/en/

Mateusz 

[KrzyFul2]

Dear Mateusz,

Thank you for quick response. I am wondering which method is used to calculate JTFS. Is it Short time Fourier transform? If yes, then what is the unit returned by the function for z-axis?

I have described my problem in attached .docx file.

Krzysztof

[MateuszLoska]

Hi Krzysztof,

Can you please confirm that you are using functions from Example Programs section of our webpage, which is:  http://www.ni.com/example/28940/en/