[Beginner] LabVIEW 2010: Vi 'Writing on a text file' overwrite an existing file rather than add new data

Similar Questions

• Control of the authorization of sharing when writing to a text file

  I have several application that writes a file of text defined in a file share.  Another application, not a LabVIEW application then reads the delimited text file.  When my application is creating or writing to the file text delimited, is there a way to manipulate the permissions so that no other application can read the file at the same time, I am writing to you in the file?  I can do this in Visual Basic through the FileShare (http://msdn.microsoft.com/en-us/library/system.io.fileshare(v=vs.110).aspx) option during the creation of filestream, but I don't see this option in LabVIEW.  Thank you.

  Too bad.  I believe that this is possible thanks to the function of "deny access".

• How to add new data and delete old data from a custom text file?

  Hi guys!

  Well, I'm in a bit of trouble.

  I need to make a request to some GPS tools. Split data in indicators, generate coordinates (google maps format), and so it goes.

  One of the functions of the systems is the calculation of oscillation of coordinates. The formula should be: latitude 1 - latitude 2 = latitude AND longitude 1 - 2 = swing longitude longitude oscillation.

  Since I'm on two values, I thought: "Oh, if I connect these data in a file, I just pick up and do all the calculations part." Yes, this idea is adapted to my needs (even if it is not the best, the computer part solved my problem).

  BUT I don't see a way to write the current value of the loop and erase the old results.

  For example, suppose that loop 1 gave me 1.00000, 2,00000 coordinates and loop 2 gave me the coordinates 3.00000 and 4.00000. Right?

  My log file is similar to: 1.00000,2.00000; 3.00000,4.00000;

  Well, it works. However, we will look forward to loop 3: coordinates 5.00000,6.00000.

  If the program connects to it, I would get the chain: 1.00000,2.00000; 5.00000,6.00000; When I really need 3.00000,4.00000; 5.00000,6.00000;.

  For this reason, when I apply the calculation of oscillation, it will always take the most recent value and do all the calculations with the first result (from loop 1).

  Well, I wonder that there is a way to add new data to a file and replace the old values, with simple code. If anyone knows how, please respond here!

  Considerations:

  (1) I want to do it as simple as possible. My code is kind of great, and it is not appropriate to insert structures or library now.

  (2) maybe the explanation is not as simple as it is for me. Really, I couldn't find a better way to say what I need.

  (3) if someone has doubts as to my doubts, please just comment and I'll try to be as specific as possible.

  Thanks in advance!

  I guess my question is why write a file just to delete.

  If you pass an array of points from one iteration to another, you will have to take extra time to open the file, read the file, delete the old data, writing the new data, save the file, and then close the file.  It would be pretty much the same thing, but without having to go through the hard drive.

  Just a thought.

• Writing to a text file in SDCard

  Hello

  I want to write text to a file in the SD card. Below is the code I wrote:

  public EditField editfield.

  public String filepath="file:///SDCard/BlackBerry/documents/Test.txt;

  Thanks for all!

  Succsessfully written the text file data entered in the edit field.

  Kind regards

  Pounet

• Windows 8 cursor jumps in the existing text and continues to type here rather than the finish line that I am on, anyone else spotted the same thing?

  Just upgraded to Windows 7 to 8, using MS Office Word 2010, worked well on Win 7, but now type text and the cursor suddenly jumps into the existing text and continues typing, rather than the finish line that I'm on.  Thought, I was accidentally touched for touch pad or other keys, so now consciously look for this but can find nothing on my part.  Have experienced it before with a processor OS Linux and Open Source, when the OS has been updated.  Think there may be a loophole to WIN 8.  It also happens when keying in the screens like this, that has happened twice while here. Someone else spotted the same thing?  Or is it just me?

  Also, anyone know how to disable "Open Tap" on the Mouse touchpad of the notebook, its annoying, I could disable in WINDOWS 7 but cannot know how Win8.

  Thank you very much for your help, the setting was not really there, but you gave me the name of the device, so I was able to download the right driver from

  http://www.Synaptics.com/resources/drivers

  above mentioned just in case anyone has the same problem. The site recommend to go with the hardware vendor's website, but ASUS has wrong driver, one of the above works fine.

  Its such a relief to be able to settle this problem - THANK you

  Lets see if it sorts the problem MS Office too.

• a few text links appear as a 'barred' rather than normal underscore

  Hello, can you help me?

  I installed the latest version of Firefox, V4 a few weeks without problem. However, these days, I noticed that a lot of text links, when you view a variety of sites, is displayed as a bar, rather than the normal emphasis style.

  Start Firefox in Firefox to solve the issues in Safe Mode to check if one of the extensions of the origin of the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > appearance/themes).

  • Makes no changes on the start safe mode window.
  • https://support.Mozilla.com/kb/safe+mode

  Safe mode disables extensions in Firefox 4, and disables hardware acceleration.

  • Tools > Options > advanced > General > Browsing: "use hardware acceleration when available.

  If disable hardware acceleration works then check if there is an update available for your graphics display driver.

• need to adapt the string values when writing to a text file

  Hello

  I have problem by lining up all of the data in wise coloumn. the output is (see attachment). I'm trying to solve this problem, but seems to be difficult. help please...

  
  

• 1 error in writing on a text - installer with Application Builder file

  I wrote an installer using the Application Builder to install the runtime engine that allows any computer without LabVIEW to run an .exe program. Setup runs and installs engine race and then as a .exe VI. When it is done installing, the .exe VI opens automatically.

  An error appears when the .exe opens and says "1 error in writing to a text file". If the user clicks on the error that it can run the program without problem, it converts file formats in a file .lvm. Automatically, it generates a new file name and saves the file in the same directory, but with a different name.

  Why did it only happen when opening first upward? The program tries to run when it automatically opens? Is there a file path residual left in the program that trys to run first, before that the user put his own file path in the program?

  I am semi new to labVIEW (a few months) and that nothing shows that would create this error at the beginning of the program.

  Thank you

  Hi Scott,.

  Well, you could model a little VI and turn on debugging highlighted to test your idea!

  THINK THE STREAM!

  How a Boolean entry should WAIT for the action of the user? It should be read according to the stream!

  What this small pseudo-code:

  REPEAT
  
    Wait (50ms)
  
  Until the button

  Or how about an event in the user queue structure?

• Writing data in the text file or excel spreadsheet

  Hello

  I have a silly question to ask questions about the writing of data in a text file or a spreadsheet. I have an example that simulates a sine-swept DAQmx. The output it provides is the (amplitude and phase) frequency response function that is plotted on a graph (see VI) attached. I like to use these data for further analysis by transmitting the data to a text file or a spreadsheet. I've tried a few things, but the thread is broken. I guess I use the sink badly - so I was wondering, can you please advise me on what sink should I use?

  Your help would be very appreciated,

  Thank you very much

  REDA

  The wire is broken, because you cannot connect this type of data to one of these two functions. The data source type is a table 1 d of the clusters, where each cluster contains two tables. The text file write accepts strings, not clusters. Writing on a file action accepts dynamic data, and while you can convert dynamic data tables, there is no built-in mechanism to convert a table 1 d of the clusters of two matrices.

  What you need to do is to convert the data in a format which can be accepted by these functions. Since you want to have a "spreadsheet" file then you should use writing to the spreadsheet file that creates a delimited text file. Since the frequency data would be the same for the plot of the magnitude and phase diagrams, you can have 3 columns: frequency, amplitude, and phase. You can take off the items using Unbundle by name, and then create a table 2D of each element of the cluster. The real question is to know if you want to save the data at each iteration and if you simply add on the file. The attached figure shows write an initial header and then adding just streaming the data.

• Error 1 has occurred to writing to text file

  Hey there!

  I tried to write a VI that takes some steps to some specific period of time and then save it in a text file. But I get an error indicating that the input parameter is not valid in writing to a text file. This always happens in the second round of the loop. I've attached screenshots.

  Thanks in advance.

  You close the file at the end of the loop and you never open it again.  Move the close file outside of the loop (after him).

• Can I get this program converted to readable in Labview 2010?

  Can I get the programs following, converted in readable in Labview 2010? I think the real files are in Labview 2013!

  Thank you

  http://forums.NI.com/T5/version-conversion/BD-p/VersionConversion

• UTL_FILE text file writing

  Dear all,
  
  I use the UTL_FILE to write a text file.
  

  C:=sample.txt;
  F := UTL_FILE.FOPEN('EX',C,'W');
  for I in C1 LOOP
  UTL_FILE.PUT_LINE(F,
                    I.1||'|'||
                    I.2||'|'||
                    I.3||'|'||
                    I.4||'|'||
                    I.5);
                    UTL_FILE.FFLUSH(F);
  end LOOP;
   utl_file.fclose(f);
  end;
  {CODE}
  
  When i open the txt file in Notepad , The data coming in the single line with some enter key ( Carriage val)

  sample:
  1233 | 1111 | 1111 | 1111 (square box) 1222 | 1111 | 1111 | 1111 (square box) 1211 | 1111 | 1111 | 1111
  
  
  How to remove the key enter during the writing of the text file. Or any other solution to get a notebook for the sub file condition
  

  Result needed.
  1233|1111|1111|1111
  1222|1111|1111|1111
  1211|1111|1111|1111

  Thanks in advance.
  
  See you soon,.
  San.

  Your database server is likely to be Unix or Linux, right? Which means that it uses a single character (LF) to "new line", rather than Windows that use two characters (CR - LF) to 'new line '.
  (If you open your file with WordPad instead of NotePad it will probably look OK.)

  UTL_FILE. Put_line uses as a "new line" everything that uses the o/s database server.

  So if you want to write a file to be used specifically in Windows, you can make your own "new line" rather than using the servers.
  Use PUT rather than PUT_LINE and simply add the two characters that Windows uses to "new line":

  UTL_FILE.PUT(F,
                    I.1||'|'||
                    I.2||'|'||
                    I.3||'|'||
                    I.4||'|'||
                    I.5|| CHR(13) || CHR(10) );
  

• How can I correct D 0 and 0 get replaced by 0D 0a in the written text file?

  Hello

  I'm using LabVIEW 2009. As I am currently using LabVIEW for my diploma, I'd appreciate any help on my problem. So here's my problem:

  The VI I wrote it constantly reads data out of a VISA Serial Port and the string obtained is saved in a text via "writing text file.vi" file (The "write to the binary" produces additional data (for the most part, 00 s) I don't want to have in my data.) But when I open the text file and try to analyze the data that each instance of 0a or 0D is replaced by 0D 0. If the data is already 0D 0 what would not be affected.

  Does anyone have a solution for this problem?

  Thank you for taking the time to read my question...

  What happens if you do a right click of the 'writing on a text file' and uncheck the box "convert EOL?

• Convert data from text file to display for hex UDP transmission controls

  Hello

  I'm reading packets ethernet from a text file containing the actual hex data packets to then send these accurate return through a writing UDP hex data. I can't understand how to feed data into the function of writing UDP as real rather than characters ASCII hex data, as it does by default. I had the screen on the last VI before the writing of the UDP to "hexadecimal display mode" and if I manually type the hexadecimal values in the VI (hexadecimal string to binary String.vi - attached), then it passes the commands correctly. However,... when I fed the string of text in my text file data in this VI, it seems to be the substitution of this hexadecimal display on the VI input mode and the resulting entry in my UDP is still ASCII character mode. I tried to use a cast inside this VI, type... but that doesn't seem to work right. I have attached the main VI and VI which tries to prepare data before reading the UDP protocol. I've also attached an example of text file of data that I am an attempt of analysis.

  Any help would be appreciated,

  Thank you

  Hi jsrocket,

  the attached example should work as a transformation.

  Mike

• How to find the largest number of text file

  I use the "Read from the text file" block to read the data in my .txt file in labview.  It is now in the string format.  I have a lot of numbers in the file.

  For example:

  0.45

  0.35

  0.12

  1,354

  1.56

  2.89

  5.89

  0.56

  That's what might look like a text file.  I want to find out which of these numbers is larger and do calculations with this number.  I have problems with channels/number/berries formats, etc.  Thank you

  Try to read that the file with File.vi reading worksheet with transposes the True value. Then use the table Max & Min to get the biggest number in the table.

  Lynn