MATLAB BUILDER EX 1 Guide de l'utilisateur télécharger pdf (Page 61)

Spectral Analysis Example

'Cancel button click event handler. Exits form without computing fft

'or updating variables.

Unload Me

End Sub

Private Sub btnOK_Click()

'OK button click event handler. Updates state of all variables from controls

'and executes the computefft or plotfft method.

Dim R As Range

If theFourier Is Nothing Or theFFTData Is Nothing Then GoTo Exit_Form

On Error Resume Next

'Process inputs

SetR=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

SetR=Range(refedtFreq.Text)

If Err = 0 Then

Set Frequency = R

End If

SetR=Range(refedtReal.Text)

If Err = 0 Then

theFFTData.Real = R

End If

SetR=Range(refedtImag.Text)

If Err = 0 Then

theFFTData.Imag = R

End If

SetR=Range(refedtPowSpect.Text)

If Err = 0 Then

Set PowerSpect = R

End If

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MATLAB BUILDER EX 1 Guide de l'utilisateur Page 61