replace data path in Fit

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Thu, 08/07/2014 - 09:49 pm

Hi guys,

i m almost done with writnig my first own larger procedure. In one Function there is still samething, which doesnt work how it should:

Function fitSpotX()   // find and return x-component of maximum
    // read cursor positions
    Variable Ax=xcsr(A)
    Variable Ay=vcsr(A)
    Variable Bx=xcsr(B)
    Variable By=vcsr(B)
       
    //Fit area between cursors
    CurveFit/Q Gauss2D, :rawData:ONEOUTOFAHUNDRET [Ax,Bx][Ay,By] /D  
    Print "Maximum is at x0=" , K2,"y0=",K4
   
    //return x-coordinate of maximum
    return K2
End


So the data path needs to be generalized. It shall be always the uppermost Graph, so i tried a little with WinName(0,1)
Till now i couldnt find a solution, can anybody help?

Thanks!
Assuming that I understand what you want to do ...

If cursor A is assumed to be on the source wave for the fit in the top graph:
    Wave waveToFit = CsrWaveRef(A)


If the wave to be fit is assumed to be the first wave in the top graph:
    Wave waveToFit = WaveRefIndexed("", 0, 1)


Then use waveToFit as the source wave in your CurveFit command.

August 7, 2014 at 10:02 pm - Permalink

Thanks hrodstein,
works perfectly like this:

Function fitSpotX()   // find and return x-component ox maximum
    // read cursor positions
    Variable Ax=xcsr(A)
    Variable Ay=vcsr(A)
    Variable Bx=xcsr(B)
    Variable By=vcsr(B)
   
        //Fit area between cursors
    Wave waveToFit = CsrWaveRef(A)      //Fit will be from graph with cursor
   
    CurveFit/Q Gauss2D waveToFit [Ax,Bx][Ay,By]
    Print "The center of this spot is at X=" , K2,"Y=",K4
   
    //return x-coordinate of maximum
    return K2
End

August 8, 2014 at 12:13 am - Permalink