LI7700 Data Parser

Option Explicit
Const ForWriting As Integer = 2

Public Sub main()
    ' Declare a few variables
    Dim input_directory As String
    Dim output_directory As String
    Dim fso, Folder, Files, file, filearray, filename
    Dim infile, outfile
    Dim templine, temparray
    Dim outfilestring
    
    ''''''''''''''''''''''''''''''''''''
    '''                              '''
    ''' set the input output stuff.  '''
    '''                              '''
    ''''''''''''''''''''''''''''''''''''
    input_directory = "c:\uaf\active_projects\osp\li7700-ch4\raw\"
    output_directory = "c:\uaf\active_projects\osp\li7700-ch4\clipped\"
    
    
    
    
    '''''''''''''''''''''''''''''''''''''''''''''''
    '''                                         '''
    ''' List all of the files in the directory  '''
    '''                                         '''
    '''''''''''''''''''''''''''''''''''''''''''''''
    Set fso = CreateObject("Scripting.FileSystemObject")
    If fso.FolderExists(input_directory) And fso.FolderExists(output_directory) Then      ' Path is a directory
        Set Folder = fso.GetFolder(input_directory)
        Set Files = Folder.Files
        
        '''''''''''''''''''''''''''''''''''
        '''                             '''
        ''' Open and analyze each file  '''
        '''                             '''
        '''''''''''''''''''''''''''''''''''
        For Each file In Files
            ' Get the name of the input file
            filearray = Split(file, "\")
            filename = filearray(UBound(filearray))
            '''''''''''''''''''''''''''''''''''''''''''''
            '''                                       '''
            ''' create a name for the output file...  '''
            ''' if you'd prefer a different name,     '''
            ''' change this line.                     '''
            '''                                       '''
            '''''''''''''''''''''''''''''''''''''''''''''
            outfilestring = output_directory & "clip_" & filename
            ' open the input and output files for reading writing
            Set infile = fso.opentextfile(file)
            Set outfile = fso.opentextfile(outfilestring, ForWriting, True)
            ' loop through the lines of data in the input file
            Do While infile.atendofstream <> True
                templine = infile.readline
                temparray = Split(templine, Chr(9))  ' split each line based on tabs
                ' just a way to skip over the lines at the top
                If UBound(temparray) > 9 Then
                    ' if not numeric it's a header to skip.
                    If IsNumeric(temparray(8)) Then
                        ' at this point we should have a valid data point to check.
                        If CDbl(temparray(8)) >= 30 Then
                            '' Good data, save it to the output file.
                            outfile.writeline templine
                        End If
                    End If
                End If
            Loop
            infile.Close
            outfile.Close
        Next
    End If
End Sub