Turning a .txt file into a wave

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I want to upload a .txt file as a 1 column wave, this is what I have so far, I am not sure what the next steps would be. I have attached the .txt file that I am trying to upload.

NewPath/O dataFolder
String callist=ListFilesofType("dataFolder",1,".txt")
String timefile=StringFromList(0,callist)
LoadWave/G/M/D/A=wave/P=datafolder timefile


Thanks spot2.txt (5.72 KB)
From "I want to upload a .txt file as a 1 column wave", I am guessing that you want to concatenate all of the columns in the matrix wave created by LoadWave/G/M into a single 1D wave. After LoadWave/G/M, you can use Redimension to convert the wave to 1D. Something like:

    String name = StringFromList(0, S_waveNames)    // Get name of the wave created by LoadWave
    Wave w = $name  // Create a wave reference
    Variable numRows = DimSize(w, 0)
    Variable numColumns = DimSize(w, 1)
    Variable numPoints = numRows * numColumns
    Redimension/N=(numPoints) w


BTW, when you post Igor code, use <igor> and </igor> tags as explained at http://www.igorexchange.com/node/3221

November 18, 2016 at 03:16 pm - Permalink
It still is not working, I keep getting an error message that states: while executing LoadWave: no data was found in file. 

 Function Loadtimeaxis (cwl) 
    Variable cwl
    NewPath/O dataFolder //dialog box to get the data folder path
    String callist=ListFilesofType("dataFolder",1,".txt")
    String timefile=StringFromList(0,callist)
    LoadWave/G/M/P=datafolder timefile
    String name = StringFromList(0,timefile)    // Get name of the wave created by LoadWave
    Wave w = $name  // Create a wave reference
    Variable numRows = DimSize(w, 0)
    Variable numColumns = DimSize(w, 1)
    Variable numPoints = numRows * numColumns
    Redimension/N=(numPoints) w
End

November 21, 2016 at 12:50 pm - Permalink
[quote]I keep getting an error message that states: while executing LoadWave: no data was found in file.[/quote]

Although my web browser makes it look like your file contains numbers in columns, in fact, it contains one long row of number separated by tabs.

You can't use LoadWave/G for this data. To understand why, execute this:
DisplayHelpTopic "Loading General Text Files"


You can use LoadWave/J (Load Delimited Text). Here is a function that may get you started in the right direction:

Menu "Load Waves"           // Add to Load Waves submenu
    "Load Time File...", LoadTimeFile("", "")
End
 
Function LoadTimeFile(pathName, fileName)
    String pathName     // Name of an Igor symbolic path or ""
    String fileName         // Name of file or full path to file
 
    // First get a valid reference to a file.
    if ((strlen(pathName)==0) || (strlen(fileName)==0))
        // Display dialog looking for file.
        Variable refNum
        String filters = "Text Files (*.txt):.txt;"
        filters += "All Files:.*;"
        Open/D/R/P=$pathName /F=filters refNum as fileName
        fileName = S_fileName           // S_fileName is set by Open/D
        if (strlen(fileName) == 0)      // User cancelled?
            return -1
        endif
    endif
 
    LoadWave/J/M/P=$pathName/Q fileName
    String listOfWaves = S_waveNames        // S_waveNames is set by LoadWave
    String filePath = S_path + S_fileName   // S_path and S_fileName are set by LoadWave
    
    String name = StringFromList(0, listOfWaves)
    Wave w = $name                  // Create a wave reference
 
    // Redimension as 1D wave
    Variable numRows = DimSize(w, 0)
    Variable numColumns = DimSize(w, 1)
    Variable numPoints = numRows * numColumns
    Redimension/N=(numPoints) w
    
    Printf "Loaded wave %s from \"%s\"\r", name, filePath
    
    return 0    // Success
End


To clarify what a symbolic path is versus a data folder, execute these commands:
DisplayHelpTopic "Symbolic Paths"
DisplayHelpTopic "Data Folders"

November 21, 2016 at 01:41 pm - Permalink