May i write data to a spreadsheet file at different times

I'd like to write two sets of data at different times(not simutaniuosly)into the same spreadsheet file. I tried to re-open the spreadsheet file which i created when i wrote in the first set of data, to write in the second set of data. But it didn't work. I don't know what's wrong with my program. I have selected APPEND when I tried to write the second set of data in the old file.

not nay errors appear.
the following is a similar easy copy of the program. I don't want to post my original program because too many subroutines.
Tanks a lot to Mikeporter
Attachments:
easier_copy_of_my_program.vi ‏28 KB
gen3.txt ‏78 KB
P4SG-1Z(MOB-FRE) ‏14 KB

Similar Messages

  • How continuously write data to a txt file

    hello, 
    first of all, sorry for bad English, but I have a problem to continuously write data to the txt file.... I have one 2D array with values of some function and based on 2 sliders (values of the sliders) i want to interpolate value using bilinear method... and after that value of the sliders, interpolated value, and value of the nearest points i wish to write to txt file ... for every 2-3 seconds perhaps it would be ideal to be formated as :: 
    x   y   f     f1   f2   f3   f4
    but... first i have problem with writing data, because every time it deletes old data and just write new one and it's not horizontal... I'm very very new at this (it is obvious) and any help will be very appreciative  
    thanks  
    Solved!
    Go to Solution.
    Attachments:
    Proba.vi ‏21 KB

    Hi there,
    May I suggest you start with the LabVIEW tutorial?  Or perhaps this one?
    I say that because 1) you said you're new at this, and these tutorials are great for getting started; and 2) you don't seem to understand the concept of dataflow.
    A structure, such as a loop or subVI or function, cannot start executing until it has all of its inputs available.  Therefore, the loop which contains your file write (bottom loop) cannot execute until your top loop is done executing, because it depends on inputs from your top loop and those inputs aren't available until the top loop is finished.  Thus, your file will contain only the data from your final top loop execution.  You might be thinking that your loops are executing in parallel.  They are not.  Your file loop is executing after your data loop has finished...that is to say, your file loop executes exactly once, after you press your stop button.
    You can do two things here to fix that:
    1.  You can move your file write into the top (data) loop. (probably easier for now)
    2.  You can use a queue to transfer the data from your top (data) loop into your bottom (file write) loop. (more complex, but a better idea in the long run)
    One other thing.  Move the "open file" function outside the loop.  Opening and closing the file in each loop iteration will cause problems.  Open the file once.  Write to it in each loop iteration.  Close it when you're done.  Like this:
    Note that this is not complete code...you need to provide the data to write.  This is just to show you how to set up a continuous file write.
    Ok, start with the tutorials and we'll go from there. 

  • Write data to multiple text files after specific size

    Hello,
    I wrote a code that contineously writes data to  a text file. The problem is I am running this VI for long time and therefore this text file is being bigger in size e.g. more than 10MB. I want to split writing data in this text file after max 1MB size. Can anyone help ????
    thanks in advance.

    CMW.. wrote:
    You could use the "File/Directory Info Function" in the Advanced File VIs and Function palette to check the size. If the file is too big. close it and create a new one.
    I would use the Get File Position since this won't cause Windows to have to do so much.  Assuming you are just writing and not setting the file position manually, this will return the size of the file in bytes (file position will always be at the end of the file).
    There are only two ways to tell somebody thanks: Kudos and Marked Solutions
    Unofficial Forum Rules and Guidelines

  • How to write data to an XML file present under application server

    frnds: can ne one tell me, how to write data in to a file, which is present under a application server
    Ex: i want to write a string data in to a file test.txt which is present under "http://localhost:8080/<some_webapp>/test.txt"
    Note:i have deploted a service<some_webapp> under Tomcat/webapps dir

    Very simple. A servlet can writes to that file if it has the good rights.
    In the servlet get (or post) method, use a code like this:
    import java.io.*;
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
    try {
    String filePath = this.getServletContext().getRealPath("/text.txt");//See http://java.sun.com/products/servlet/2.2/javadoc/javax/servlet/ServletContext.html#getRealPath(java.lang.String)
             PrintWriter writer = new PrintWriter (filePath);
            //or BufferedWriter out = new BufferedWriter(new FileWriter(filePath));
            writer .println("aString");
           writer.flush();
            writer .close();
        } catch (Exception e) {
           e.printStackTrace();
    }Hope That Helps

  • Which background process writes date into alert log file in oralce

    which background process writes date into alert log file in oralce

    Hi,
    AFAIK, all the background process are eligible for writing information to alert log file. As the file name indicates to show the alerts, so background process have the access rights in terms of packages (dbms), to write to alert log.
    I might be wrong also..
    - Pavan Kumar N

  • Write arrays into a text file in different columns at different times

    Hi,
              I have a problem write data into a text file. I want to write 4 1D arrays into a text file. The problem is that I need to write it at different time and in different column (in other word, not only append the arrays).
    Do you have an idea to solve my problem?
    Thank you

    A file is long a linear string of data (text). In order ro insert columns, you need to rewrite the entire file, because colums are interlaced over the entire lenght of the file.
    So:
    read file into 2D array
    insert columns using array operations
    write resulting 2D array to file again.
    (Only if your colums are guaranteed to be fixed width AND you know the final number of colums, you could write the missing columns as spaces and then overwrite later. Still, it will be painful and inefficient, because column data are not adjacent in the file.)
    LabVIEW Champion . Do more with less code and in less time .

  • Trying to write data to a text file using java.io.File

    I am trying to create a text file and write data to it by using java.io.File and . I am using JDeveloper 10.1.3.2.0. When I try run the program I get a java.lang.NullPointerException error. Here is the snippet of code that I believe is calling the class that's causing the problem:
    String fpath = "/test.html";
    FileOutputStream out = new FileOutputStream(fpath);
    PrintStream pout = new PrintStream(out);
    Do I need to add additional locations for source files or am I doing something wrong? Any suggestions would be appreciated.
    Thank you.

    Hi dhartle,
    May be that can help:
    * Class assuming handling logs and connections to the Oracle database
    * @author Fabre tristan
    * @version 1.0 03/12/07
    public class Log {
        private String fileName;
         * Constructor for the log
        public Log(String name) {
            fileName = name;
         * Write a new line into a log from the line passed as parameter and the system date
         * @param   line    The line to write into the log
        public void lineWriter(String line) {
            try {
                FileWriter f = new FileWriter(fileName, true);
                BufferedWriter bf = new BufferedWriter(f);
                Calendar c = Calendar.getInstance();
                Date now = c.getTime();
                String dateLog =
                    DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.MEDIUM,
                                                   Locale.FRANCE).format(now);
                bf.write("[" + dateLog + "] :" + line);
                bf.newLine();
                bf.close();
            } catch (IOException e) {
                System.out.println(e.getMessage());
         * Write a new line into a log from the line passed as parameter,
         * an header and the system date
         * @param   header  The header to write into the log
         * @param   info    The line to write into the log
        public void lineWriter(String header, String info) {
            lineWriter(header + " > " + info);
         * Write a new long number as line into a log from the line 
         * passed as parameter, an header and the system date
         * @param   header  The header to write into the log
         * @param   info    The line to write into the log
        public void lineWriter(String header, Long info) {
            lineWriter(header + " > " + info);
         * Enable to create folders needed to correspond with the path proposed
         * @param   location    The path into which writing the log
         * @param   name        The name for the new log
         * @return  Log         Return a new log corresponding to the proposed location
        public static Log myLogCreation(String location, String name) {
            boolean exists = (new File(location)).exists();
            if (!exists) {
                (new File(location)).mkdirs();
            Log myLog = new Log(location + name);
            return myLog;
         * Enable to create the connection to the DB
         * @return  Connection  Return a new connection to the Oracle database
        public static Connection oracleConnectionCreation() throws Exception {
            // Register the Oracle JDBC driver
            DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
            //connecting to the DB
            Connection conn =
                DriverManager.getConnection("jdbc:oracle:thin:@myComputerIP:1521:myDB","user", "password");
            return conn;
         * This main is used for testing purposes
        public static void main(String[] args) {
            Log myLog =
                Log.myLogCreation("c:/Migration Logs/", "Test_LinksToMethod.log");
            String directory = "E:\\Blob\\Enalapril_LC-MS%MS_MS%MS_Solid Phase Extraction_Plasma_Enalaprilat_ERROR_BLOB_test";
            myLog.lineWriter(directory);
            System.out.println(directory);
    [pre]
    This class contained some other functions i've deleted, but i think it still works.
    That enables to create a log (.txt file) that you can fill line by line.
    Each line start by the current system date. This class was used in swing application, but could work in a web app.
    Regards,
    Tif                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

  • Read multiple files and write data on a single  file in java

    Hello,
    I am facing difficulty that I want to read multiple files in java and write their data to a single file. Means Write data in one file from multiple files in java
    Please help me out.
    Naveed.

    algorithm should be something like:
    File uniqueFile = new File();
    for (File f : manyFilesToRead)
       while (readingF)
           write(dataFromF, intoUniqueFile);

  • Write data to local xml file

    Does anyone know if there is a way to write data to a local xml file using the Connection refresh Button??

    Hi there Glenn,
    That's tricky...
    Are you using SP1?  You need to have at least SP1.
    The XLFs were generated with an internal build newer than SP1, but they should still work in earlier builds.
    If you changed the HTML file, that might be the cause.  The SWF references in the HTML file must be exact. 
    Also, the range names must match as defined in the XLF/SWF.  The bolded lines following should match.  It's easiest if they all use the SWF name.
    else if (hasRequestedVersion) {
    // if we've detected an acceptable version
    // embed the Flash Content SWF when all tests are passed
    AC_FL_RunContent(
    "src", "consumer",
    "width", "380",
    "height", "308",
    "align", "middle",
    "id", "consumer",
    "quality", "high",
    "bgcolor", "#ffffff",
    "name", "consumer",
    +"flashvars",'historyUrl=history.htm%3F&lconid=' + lc_id + '',+
    "allowScriptAccess","always",
    "type", "application/x-shockwave-flash",
    "pluginspage", "http://www.adobe.com/go/getflashplayer"
    } else {  // flash is too old or we can't detect the plugin
    var alternateContent = 'Alternate HTML content should be placed here. '
    'This content requires the Adobe Flash Player. '
    '<a href=http://www.adobe.com/go/getflash/>Get Flash</a>';
    document.write(alternateContent);  // insert non-flash content
    // -->
    </script>
    <noscript>
    <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
    id="consumer" width="380" height="308"
    codebase="http://fpdownload.macromedia.com/get/flashplayer/current/swflash.cab">
    <param name="movie" value="consumer.swf" />
    <param name="quality" value="high" />
    <param name="bgcolor" value="#ffffff" />
    <param name="allowScriptAccess" value="always" />
    <embed src="consumer.swf" quality="high" bgcolor="#ffffff"
    width="380" height="308" name="consumer" align="middle"
    play="true"
    loop="false"
    quality="high"
    allowScriptAccess="always"
    type="application/x-shockwave-flash"
    pluginspage="http://www.adobe.com/go/getflashplayer">
    </embed>

  • Organizing a multiplexer acquired data in a spreadsheet file of a column major order

    I am a beginner user of Labview, but I managed to make VI incrementing a running index from 0 to 15 in order to interface with a multiplexer, while providing a predetermined time delay between each cycle of the sixteen iterations. I have just emulated this case study before its practical implementation by constructing a VI saving the analog data acquired from a two analog input ports at each value of the running index in a txt file (File: Multiplexer_Output_Data_Test.pdf). The challenge is how to alternatively store the data in a spreadsheet excel file in which every row has a thirty three cells, or in other words, the first cell has the time stamp, while the next sixteen cells contain the analog data of the first port spanning all the sixteen values of the running index, and the same approach applies for the last sixteen cells associated with the second analog input port. The process repeats itself after the predetermined time delay in the successive rows. In the attached VI, I would like to replace the last frame of saving into text file with my desired form in excel sheet.
    Any help would be highly appreciated
    Solved!
    Go to Solution.
    Attachments:
    Multiplexer_Output_Data_Test.pdf ‏5 KB
    Multiplexer_Data_Acquisition.vi ‏186 KB

    steve.bm wrote:
    Hi Diaa,
    I found this example and I think this applies to your needs. You can find more information about Dynamic Data Exchange here.
    Regards,
    This is exactly what I am looking for all the past week.
    Your help was extremely appreciated and to the point.

  • How can you save data to a spreadsheet and use different worksheets in the spreadsheet?

    I am trying to save data to a spreadsheet.
    Each set of test data needs to be saved under a different worksheet. Is this possible and how can I do it?

    As the example that Dennis pointed out, this can be done using activeX. In addition to that example I have another that demonstrates how to create a new workbook with multiple worksheets and save data to each of them. I hope that between the two you can get an idea of what to do.
    Brian
    Attachments:
    xlexample.vi ‏66 KB

  • Write data to a logbook file only when a boolean indicator changes

    Hello
    I need to write my local variable state to a simple txt file only when it's true or false state changes.
    for example, when my local variable 'temperature too high' is true, I need something like: temperature too high.
    When it changes back to false i need: temperature OK. This with a date stamp.
    It already worked to get a date stamp and to write the true or false state down but it always gets stuck in a while loop so the program keeps writing the same sentence.
    Solved!
    Go to Solution.

    I had to take a picture with my phone because we're not allowed to connect the computers with an usb drive, I hope you can see it clear.
    I know this while loop causes the program to write the same sentence over and over again but I don't know an other way to do it right.
    Thanks 
    Attachments:
    11166065_887284134650745_1225026485_n.jpg ‏46 KB

  • Write data into an ascii file

    Hi
    The programme below is a dual channel frequency analyser simulation which store the frequency, real, imaginary data into an ascii.asc file in a folder in the PC. For each teration of the loop a pop up comes requesting to replace the file with new data. I require to save the data of the iteration when the averages are completed of the Frequency Response Function (say the data after the 100 avarage). How can I link the append to file signal of the Write to spread sheet vi of the programme with the averages completed signal of the FRF vi of the programme. By doing this I will have the data after the specified average being done on the input signal.
    Can some one help me on this.
    Thanks
    Mal
    Attachments:
    dualchannelspectrumanalyser-reimstore.vi ‏441 KB

    Hello malkoba,
    it's better than before, but not as good as taking the file write out of the loop. I cleaned up your vi a little bit...
    At the moment you append to the file as long as the calculation runs. If the max number of averages is reached you want to replace your text file and will get a dialog window. Do you want to annoy the user with some unwanted dialogs? ("Replace a file? Why should I replace? I told you to write to that file!" and so on :-)
    Best regards,
    GerdW
    CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
    Kudos are welcome
    Attachments:
    dualchannelspectrumanalyser-reimstore[1].vi ‏443 KB

  • Can I Write Data to a *.xlxsx File Without Screwing Up the Excel File Formatting?

    I'd like to programatically add LabVIEW-generated data to a nicely-formatted *.xlsx file, one with all the right borders and column widths, etc.  But every time I try to add the LabVIEW data, the xlsx file formatting gets all screwed up and the file gets corrupted.  Is there a way around this?
    Thanks!
    - FB
    Solved!
    Go to Solution.

    FB,
    I was able to find the following link on the NI website.  I think it addresses the issue you are describing using the Excel ActiveX interface.
    AutoFit Columns and Rows in Excel Using LabVIEW: http://digital.ni.com/public.nsf/allkb/8697100BBFA68902862571D4006D893B?OpenDocument
    Regards,
    Isaac S.
    Regards,
    Isaac S.
    Applications Engineer
    National Instruments

  • How to read data from a .txt file in real time

    Hi
    I am running a fortran code which takes around 1 week to run and output data are continuously saved in .txt files. I want to display these data and plot it against time in labview.
    Lets say I have a array of real numbers starting from 1.0 , and every 2-3 sec another number is added (output of code). So I dont want end-of-file-reached error in my program and also want program to wait until next data is updated in .txt file.
    I tried to make a simple read_txt_file.vi, but I am getting problems in terms of continous reading. Help !! Help !!
    Pl see the attached vi.
    Thanx
    PKJ
    Attachments:
    FileReader.vi ‏43 KB
    labview.txt ‏18 KB

    Hi PKJ,
          I modified your VI and it seems to do what you asked, that is, display the data from a file as the data is being added.
    Hope it helps!
    Message Edited by Dynamik on 11-08-2005 04:32 PM
    Message Edited by Dynamik on 11-08-2005 04:34 PM
    When they give imbeciles handicap-parking, I won't have so far to walk!
    Attachments:
    FileReader.vi ‏52 KB

Maybe you are looking for