diadem spectrogram Interpolation

[yannis]

Hi,

I have a set of data from a spectrogram over the rotating speed of a machine:

a vector of length m with the speed values

a vector of length n with the frequency values

a matrix with dimensions m x n with sound pressure level values

The problem is that for different measurements I have a bit different speeds in my data record. 

I want to interpolate the amplitude data to a speed grid defined by me, e.g. 110, 120, 130, ... 2000 rpm,

regardless of the speed at which the measurement was taken, which can be for example 107, 114, 121 ... 2004 rpm.

With the 1D linear mapping analysis tool of DIADEM this is feasible, but a bit complicated.

Is there perhaps a 3D tool in Diadem for the interpolation that I need?

Thanks,

Yannis T.

[Walter_Rick · Accepted solution]

Hi Yannis,

Yes, DIAdem supports the 3D interpolation. In ANALYSIS go to "Surfaces" and "Interpolate". You have several parameters to set-up your interpolation. On the tab page "Result points" you can choose "Take result points from channel" (for each, X and Y direction). This means, if you define a channel with your rpm's (110, 120, 130 ...) you can select this channel as result values (grid in X or Y direction).

Greetings

Walter

[yannis]

Thanks Walter !