MATLAB BUILDER EX 1 User's Guide download pdf (Page 80)

4 Usage Examples

4-28

'Process inputs

Set R = Range(refedtInput.Text)

If Err <> 0 Then

MsgBox ("Invalid range entered for Input Data")

Exit Sub

End If

Set InputData = R

Interval = CDbl(edtSample.Text)

If Err <> 0 Or Interval <= 0 Then

MsgBox ("Sampling interval must be greater than zero")

Exit Sub

End If

'Process Outputs

Set R = Range(refedtFreq.Text)

If Err = 0 Then

Set Frequency = R

End If

Set R = Range(refedtReal.Text)

If Err = 0 Then

theFFTData.Real = R

End If

Set R = Range(refedtImag.Text)

If Err = 0 Then

theFFTData.Imag = R

End If

Set R = Range(refedtPowSpect.Text)

If Err = 0 Then

Set PowerSpect = R

End If

bPlot = chkPlot.Value

'Compute the fft and optionally plot power spectral density

If bPlot Then

Call theFourier.plotfft(3, theFFTData, Frequency, PowerSpect,_

InputData, Interval)

Else

Call theFourier.computefft(3, theFFTData, Frequency, PowerSpect,_

InputData, Interval)

End If

GoTo Exit_Form

Handle_Error:

MsgBox (Err.Description)

Exit_Form:

Unload Me

End Sub

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MATLAB BUILDER EX 1 User's Guide Page 80

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