Dataset with wrong x-Axis

[Leon D]

Hello,

I have a signal that has a wrong x-axis. The time intervall between two maximas should be the same, but it isn`t. 

To correct this, i tried to use given fpscript formulas and manipulated them. My Idea is to extract maxima, delete x-values in between two maxima and replace the x-values at the maxima with the x-value at the maxima before plus a fixed time intervall. (x_before + 50000s)

The codes are modified fpscript codes from event isolation. I added the_X variable and swapped some things.

This code is supposed to delete all x-values between to maxima and replace the x-value at the maxima with the x-value at the maxima before + 50000s. The deleting of x-values in between works fine, but i have no idea how to replace the maximum values with an ascending value.

Dim _EventResult, _Sig, _Max, _Y, _Event, _X
_Y = FloatingPoint64 SourceData.Y
_X = FloatingPoint64 SourceData.X
_Sig = '2_Temp_Thermistor'
_Max = Maximum(_Sig)
If DataStructure(_Max) >= STRUCT_DATASERIES Then
_Max = Maximum(_Max)
End
_Event = Extrema(_Sig, 0.01000000000000000 * _Max, EVENT_POSITIVE, EVENT_INDEX)
_X[IndexNot(_Event, NumberOfRows(_X))] = ?
If DataStructure(SourceData) <= STRUCT_DATAMATRIX Then
_EventResult = _Y
Else
_EventResult = Signal(SourceData.Y, _X, SourceData.Z)
End
End

Interpolating afterwards works also fine.

Thanks in advance!

 

 

• This topic was modified 3 years, 4 months ago by Leon D.
• This topic was modified 3 years, 4 months ago by Leon D.

[Bernhard Kantz]

The _Event variable contains a dataset with the indices of the local maximas. Thus _Event[0] marks the first, _Event[1] the second one. Thus

_X[_Event[1]] = _X[_Event[0]] + 50000 s

should do the trick.

 

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