Save waveform data to .TXT

Hi all,
I'm acquiring data from one machine. I show all data from each channel on graph, which works OK, for different sample rate. What I want is to save this data to .TXT file.
Please take a look at my picture. What I need into .TXT file is value for each channel at each iteration. I tried to save "value" Y from each "build waveform", but what I get is data on picture. It's always saving previous data(see picture at bottom), but I need just:
17:49:16
28,192885
17:49:16
28,193563
17:49:16
28,193902
PICTURE:
Rookie; LV 2011 on WIN 7

I'm saving like this (I know I must put "open and close" block outside of while loop, but this is not my problem right now). How can I index then to save just value of each itteration...
Rookie; LV 2011 on WIN 7

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Save waveform data with corresponding time array to spreadsheet file

Hello to all
I am looking for a possibility to save voltage data acquired and displayed continousely to a spreadsheet file. Acquiring and displaying is not a big problem, but I have troubble to save the data with the corresponding timestamp with more than seconds accuracy. I am acquiring the data at 1000 Hz and read packages of 500 samples. The recording time should not be limited, it will be started and stopped manually. In fact the acquired voltage data first has to be scaled and than saved. If I use the 'WRITE WAVEFORM TO SPREADSHEET' VI the time column is in seconds' accuracy and that is not what I need. If I create my own time array from the waveform parameters I have timing problems. The accuracy in time should reflect the sample rate. I will attach one of my not very successful trials for better understanding.
please help a newcomer!
Thanks in advance
Thomas
LV 7.1
Attachments:
display & record forces v.1.0.vi ‏181 KB

I usually follow a simple method to generate time stamp
I keep sampling rate and number of samples to read as equal and do as shown in the attached VI
I also remember building a VI with a small modification to this time stamp generation logic to cater to acq, where number of samples to read is half/one fourth/one tenth of sampling rate specified, but cannot find that VI.
Hope this helps
Regards
Dev
Attachments:
Acq_DAQmx_filesave_time stamp.vi ‏121 KB

Does anyone know how to save waveform data (Write to Measurement File) with a variant iteration?

I'm using LV8.5.1

I would pull your save data loop to it's own loop then make it event driven like I did in the example. This is just an example and there are probably ways to make the code better and faster but I am just trying to give you an example that we can build on. I am not reall sure what you itterations was for other than to give your loop enough time to save. By seperating the two loops the save no longer depends on the data acquisition loop.
Tim
Johnson Controls
Holland Michigan
Attachments:
Parts.vi ‏61 KB

How do you make a VI save waveform data relative to the number of iterations that happen? (EX one save for every ten iterations)

And I was also wondering if you could alter the amount of time it takes for a loop to iterate, that way, if I wanted it to save every five hundred miliseconds, I could make it save every, say, ten iterations, and make the loop iterate every fifty ms.
Im running LV 8.5.1
Here is my code;
Attachments:
PartsIII.vi ‏106 KB

I know what the question mark is. I don't know what the "other boolean" you were referring to is.
See the attached file.
Double check the file. I took the VI you posted in message #1, but it seems to be an older and incorrect version (problems with the reference wire being the datatype for the queue and a feedback node thrown in as well) that didn't match the image you have posted in message #1.
Message Edited by Ravens Fan on 08-21-2009 03:31 PM
Attachments:
PartsIII[1].vi ‏88 KB

I want to save data to txt file on as ,how can do it ?

hi~everyone
    i have some data in inner table ,i wantto save the data into TXT file on AS,   then i download the file from AS,how can come true it ?who can give me some demo or cues ,thank you very much!
Message was edited by:
        deqiang zhang

Check the example program using GUI_DOWNLOAD and it may help you
report zan_guidownload no standard page heading.
tables : vttk.
data : begin of i_vttk occurs 0,
       tknum like vttk-tknum,
       shtyp like vttk-shtyp,
       end of i_vttk.
data : begin of i_down occurs 0,
       fld(255) type c,
       end of i_down.
start-of-selection.
select tknum shtyp from vttk into table i_vttk.
end-of-selection.
loop at i_vttk.
concatenate i_vttk-tknum ',' i_vttk into i_down.
endloop.
call function 'GUI_DOWNLOAD'
    exporting
BIN_FILESIZE                    =
      filename                        = 'C:\down.xls'
      filetype                        = 'ASC'
    append                          = 'X'
    write_field_separator           = ','
HEADER                          = '00'
TRUNC_TRAILING_BLANKS           = ' '
WRITE_LF                        = 'X'
COL_SELECT                      = ' '
COL_SELECT_MASK                 = ' '
DAT_MODE                        = ' '
CONFIRM_OVERWRITE               = ' '
NO_AUTH_CHECK                   = ' '
CODEPAGE                        = ' '
IGNORE_CERR                     = ABAP_TRUE
REPLACEMENT                     = '#'
WRITE_BOM                       = ' '
TRUNC_TRAILING_BLANKS_EOL       = 'X'
WK1_N_FORMAT                    = ' '
WK1_N_SIZE                      = ' '
WK1_T_FORMAT                    = ' '
WK1_T_SIZE                      = ' '
IMPORTING
FILELENGTH                      =
    tables
      data_tab                        = i_vttk
FIELDNAMES                      =
EXCEPTIONS
FILE_WRITE_ERROR                = 1
NO_BATCH                        = 2
GUI_REFUSE_FILETRANSFER         = 3
INVALID_TYPE                    = 4
NO_AUTHORITY                    = 5
UNKNOWN_ERROR                   = 6
HEADER_NOT_ALLOWED              = 7
SEPARATOR_NOT_ALLOWED           = 8
FILESIZE_NOT_ALLOWED            = 9
HEADER_TOO_LONG                 = 10
DP_ERROR_CREATE                 = 11
DP_ERROR_SEND                   = 12
DP_ERROR_WRITE                  = 13
UNKNOWN_DP_ERROR                = 14
ACCESS_DENIED                   = 15
DP_OUT_OF_MEMORY                = 16
DISK_FULL                       = 17
DP_TIMEOUT                      = 18
FILE_NOT_FOUND                  = 19
DATAPROVIDER_EXCEPTION          = 20
CONTROL_FLUSH_ERROR             = 21
OTHERS                          = 22
if sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
endif.
Thanks
Seshu

Save a waveform in a txt file

Hello,
I just want to save a waveform in a txt file in the simple format : Time (s)[tabulation]Current (A) instead of the labview preformatted spredsheat format time[tabulation] Y
1904-01-01 01:00:00.000000 0.000335 0

Please keep to your original thread, otherwise the information gets scattered and the forum poluted.
Regards,
André
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How can I write waveform data from a while loop?

Alright, I have a NI-5122 high speed digitizer that I need to acquire 10,000 waveforms. I am currently using the NI example code "niScope EX Multi Record Fetch More Than Available Memory.vi" to do this and then onto that later. I set the Number of Records to 10,000, min record length to 8192, and the min sample rate to 100M (S/s). On the Fetch vi, I set it to get a 1D Dbl array and then send it to the while loop edge for auto indexing. What I want is to take each waveform and write it to a file next to the previous waveform not append it to the bottom of the previous one. I can do 100 and sometimes 1000 waveforms with my current setup and then use "write measurement to file.vi" to save the data, but at 10,000 it says that the memory is full. I have 256 MB on the NI-5122 and 4G of memory on my host computer. My reasoning is that if the NI-5122 can hold all that data then why can't my host computer. I have tried to fetch using 2D Dbl and transpose that matrix and send the data to "write measurement to file.vi" inside the loop and append the data that way, but when I do this the card does not acquire any data. Which seems like a software problem. I know this is probabaly worded poorly, so just post a response if further explanation is needed.
Thank you.

Hello,
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KB 36QD14V3: Why Do I Receive a "Memory is Full, VI Stopped at Loop Tunnel 0xXXXX" Error?
KB 3ZNDGRS9: LabVIEW "Memory is Full" Error
Samantha
National Instruments
Applications Engineer

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"13.000000,393.000000 13.000000,291.000000 92.000000,284.000000 94.000000,380.000000 64.000000,385.000000 13.000000,388.000000 "The problem is every time i tried to read and save the data, i also save the double quote sign. Is there anyway to ignore the double quote sign? I am using the below coding to read and save the data in double array. Anyway will be great.
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How to save a datas from serial port?

How to save a datas from serial port?

Hi
I need some help about rs-232 communication. I want to make a vi witch can do this things:
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so
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Best regards,
Ninjatovitch
Solved!
Go to Solution.
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this should be in 8.2
Harold Timmis
[email protected]
Orlando,Fl
*Kudos always welcome
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My network printer/copier/scanner can only read in about 70 pages at a time, so I scanned in as several PDF documents, which I saved to disk.
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Thanks.

gilgad2000,
It depends on your VI. If you are using the "Path Control" tool, you can open its "Browse Options" and write .txt at the Pattern box.
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Message Edited by Danigno on 07-17-2009 03:18 AM
Attachments:
Snap1.png ‏3 KB

Java.io.NotSerializableException when overwrite the JTable data into .txt file

hi everyone
this is my first time to get help from sun forums
i had java.io.NotSerializableException: java.lang.reflect.Constructor error when overwrite the JTable data into .txt file.
At the beginning, the code will be generate successfully and the jtable will be showing out with the data that been save in the studio1.txt previously,
but after i edit the data at the JTable, and when i trying to click the save button, the error had been showing out and i cannot succeed to save the JTable with the latest data.
After this error, the code can't be run again and i had to copy the studio1.txt again to let the code run 1 more time.
I hope i can get any solution at here and this will be very useful for me.
the following is my code...some of it i create it with the GUI netbean
but i dunno how to attach my .txt file with this forum
did anyone need the .txt file?
this is the code that suspect maybe some error here
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String filename = "studio1.txt";
          try {
              FileOutputStream fos = new FileOutputStream(new File(filename));
              ObjectOutputStream oos = new ObjectOutputStream(fos);
               oos.writeObject(jTable2);
               oos.close();
          catch(IOException e) {
               System.out.println("Problem creating table file: " + e);
               return;
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}the full code will be at the next msg

this is the part 1 of the code
this is the full code...i had /*....*/ some of it to make it easier for reading
package gui;
import javax.swing.*;
import java.io.*;
public class timetables extends javax.swing.JFrame {
    public timetables() {
        initComponents();
    @SuppressWarnings("unchecked")
    private void initComponents() {
        jDialog1 = new javax.swing.JDialog();
        buttonGroup1 = new javax.swing.ButtonGroup();
        buttonGroup2 = new javax.swing.ButtonGroup();
        buttonGroup3 = new javax.swing.ButtonGroup();
        buttonGroup4 = new javax.swing.ButtonGroup();
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        jLayeredPane1 = new javax.swing.JLayeredPane();
        jLabel6 = new javax.swing.JLabel();
        jTabbedPane1 = new javax.swing.JTabbedPane();
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/*       org.jdesktop.layout.GroupLayout jDialog1Layout = new org.jdesktop.layout.GroupLayout(jDialog1.getContentPane());
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        jDialog1Layout.setHorizontalGroup(
            jDialog1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(0, 400, Short.MAX_VALUE)
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            jDialog1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(0, 300, Short.MAX_VALUE)
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        try {
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               jTable2 = (JTable) ois.readObject();
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          catch(Exception e) {
               System.out.println("Problem reading back table from file: " + filename1);
               return;
        try {
               ObjectInputStream ois = new ObjectInputStream(new FileInputStream(filename1));
               jTable3 = (JTable) ois.readObject();
               System.out.println("reading for " + filename1);
          catch(Exception e) {
               System.out.println("Problem reading back table from file: " + filename1);
               return;
        jTable2.setRowHeight(20);
        jTable3.setRowHeight(20);
        jScrollPane3.setViewportView(jTable2);
        jScrollPane4.setViewportView(jTable3);
        jTable2.getColumnModel().getColumn(4).setResizable(false);
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        jTabbedPane1.addTab("STUDIO 1", jScrollPane3);
        jTabbedPane1.addTab("STUDIO 2", jScrollPane4);
        jTextField1.setText("again n again");
        jLabel6.setText("jLabel5");
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Java.io.NotSerializableException when overwrite the JTable data into .txt

hi everyone
i had java.io.NotSerializableException: java.lang.reflect.Constructor error when overwrite the JTable data into .txt file.
At the beginning, the code will be generate successfully and the jtable
will be showing out with the data that been save in the studio1.txt
previously,
but after i edit the data at the JTable, and when i trying to click the
save button, the error had been showing out and i cannot succeed to
save the JTable with the latest data.
After this error, the code can't be run again and i had to copy the studio1.txt again to let the code run 1 more time.
I hope i can get any solution at here and this will be very useful for me.
but i dunno how to attach my .txt file with this forum
did anyone need the .txt file?
the following is my suspect code
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String filename1 = "studio1.txt";
          try {
              FileOutputStream fos = new FileOutputStream(new File(filename1));
              ObjectOutputStream oos = new ObjectOutputStream(fos);
               oos.writeObject(jTable2.getModel());
               oos.flush();
               oos.close();
               fos.close();
          catch(IOException e) {
               System.out.println("Problem creating table file: " + e);
                        e.printStackTrace();
               return;
          System.out.println("JTable correctly saved to file " + filename1);
}this is the reading code
String filename1="studio1.txt";
        try {
               ObjectInputStream ois = new ObjectInputStream(new FileInputStream(filename1));
               TableModel model = (TableModel)ois.readObject();
                jTable3.setModel(model);
               System.out.println("reading for " + filename1);
          catch(Exception e) {
               System.out.println("Problem reading back table from file: " + filename1);
               return;
          }Edited by: Taufulou on Jan 8, 2009 11:43 PM
Edited by: Taufulou on Jan 8, 2009 11:44 PM
Edited by: Taufulou on Jan 8, 2009 11:45 PM

is this the code u mean?
i had put this code inside it but the problem still remain the same
if (jTable2.isEditing()) {
            jTable2.getCellEditor().stopCellEditing();
        }i had found a new thing that when i just double click the cell without change any data inside the table
and click the button "Save". the same exception which is
java.io.NotSerializableException: java.lang.reflect.Constructor
will come out again.

Saving table and waveform data

Hello,
what i have is a table and digital waveform graph. what i need to do is save the data and send it to a database in xml format and then when i load the data it will populate the table and graph again. can someone give advice or an example would be ideal. thank you.

Well there are a number of XML functions in String->XML, which should help you convert your data to XML.
Then, are you using the database toolkit? If so, there's plenty of help here, and in the forums if you search for it.
If not, try looking here for some examples Mike Porter posted about connecting without the toolkit.

Save waveform data to .TXT

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