write lag to the worksheet

Similar Questions

• Multiple can write to screw the worksheet cause a change to rewrite?

  In my program I use now two parallel loops, which have both a writing on spreadsheet VI written to the same file path.  I did not really care order lines are added to the worksheet, as data from two different loops can be differentiated, but what I was asking, is that it is possible for the two live run simultaneously and have one change to crush the other, so there is a line missing in the final result.  I have seen that it is a risk for writing in local variables in parallel loops, but have not seen anything be it specifically to write to an external file.

  Thanks for your help.

  Writing on a spreadsheet file is not reentrant, while an instance of the latter can run at a time.  As long as you are concatinating, I don't expect any loss of data.

  However, a better solution would be to have another loop to process your file IO.  Then you can open it and keep it open.  You send data may be written using a queue.  And do not forget to close the output file.

• Problem reading the worksheet after you use a DLL to write on the worksheet

  Hello

  I have a few problems reading a sheet DLL created in LabVIEW. The DLL is written in C++.

  I'll dexcribe what do the VI in the screenshots:

  For DLL_INIT = the first false steps the VI (LabVIEW) values and exports in a DLL initialization.
  DLL takes these values and not some und calculation, then wrote the measured values and the new calculated values in a csv file called 'filtered_values' and a file 'filtered_values_complete '.
  so, I have two files like this after initialization:

  1.0000000000; 1.0000000000; 18.8991610737; -3.2940000000; 0.0060000000; 0.9000000000; 6.5806287097; -3.2940000000; 1.0000000000; 0.0000000000; 1.0000000000; 0.0000000000;

  So now on DLL_INIT = true.
  For the calculation, the next step i read the "filtered_values" - file (LabVIEW), calculate the new values and write in filtered_values (DLL)
  And in the "filtered_values_complete" - file I will allways read the DLL entry first, so that I can check later, if the DLL has obtained the values to the right of the front step and then add the calculated values.

  For i > 0 initialization has been made:
  -the VI bed sheet "filtered_values" calculation and rotted the table 1 d in its unique values
  -The last seven values in the worksheet have been exported in the dll as well as five new measured values.
  -This DLL is still a few calculation
  - then it replaces the "filtered_values" - file and adds a new line to the 'filtered_values_complete '.

  This migth be a bit of confusion, so a small example, afer five steps it loooks like this:

  filtered_values:
  5.0625000000; 1.0000000000; 18.9300200447; -3.2870000000; 9.7320000000; 0.8997597592; 5.9159054233; -2.6533532901; 1.0000000400; 0.0000000000; 0.8078703403; 0.0000000000;

  filtered_values_complete:
  1.0000000000; 1.0000000000; 18.8991610737; -3.2940000000; 0.0060000000; 0.9000000000; 6.5806287097; -3.2940000000; 1.0000000000; 0.0000000000; 1.0000000000; 0.0000000000;
   
  2.0625000000; 1.0000000000; 18.8330081064; -3.2940000000; 9.7270000000; 0.9000000000; 6.5806287097; -3.2940000000; 1.0000000000; 0.0000000000; 1.0000000000; 0.0000000000;
  2.0625000000; 1.0000000000; 18.8330081064; -3.2940000000; 9.7270000000; 0.8999399568; 6.4077416273; -3.1451829134; 1.0000000100; 0.0000000000; 0.9480589053; 0.0000000000;
   
  3.0625000000; 1.0000000000; 18.7932988441; -3.2870000000; 9.7280000000; 0.8999399568; 6.4077416273; -3.1451829134; 1.0000000100; 0.0000000000; 0.9480589053; 0.0000000000;
  3.0625000000; 1.0000000000; 18.7932988441; -3.2870000000; 9.7280000000; 0.8998799074; 6.2394046705; -2.9768465052; 1.0000000200; 0.0000000000; 0.8988158138; 0.0000000000;
   
  4.0625000000; 1.0000000000; 19.0445703499; -3.2870000000; 9.7320000000; 0.8998799074; 6.2394046705; -2.9768465052; 1.0000000200; 0.0000000000; 0.8988158138; 0.0000000000;
  4.0625000000; 1.0000000000; 19.0445703499; -3.2870000000; 9.7320000000; 0.8998198333; 6.0754981785; -2.8129479844; 1.0000000300; 0.0000000000; 0.8521305805; 0.0000000000;

  5.0625000000; 1.0000000000; 18.9300200447; -3.2870000000; 9.7320000000; 0.8998198333; 6.0754981785; -2.8129479844; 1.0000000300; 0.0000000000; 0.8521305805; 0.0000000000;
  5.0625000000; 1.0000000000; 18.9300200447; -3.2870000000; 9.7320000000; 0.8997597592; 5.9159054233; -2.6533532901; 1.0000000400; 0.0000000000; 0.8078703403; 0.0000000000;

  So it's good enough that the VI and it works fine until some point when the just VI reads more calculation and x = sheet! There? becomes true.

  Most of the time it happens when the csv file is about 1200 lines

  Someone knows why this happens?

  Best regards

  Stefan

  Hello

  understood, that the error occurs somewhere completely else. the thread may be closed

  BR

  Stefan

• write on the worksheet with formatting

  Dear LabVIEW Forum,

  I'm having trouble with something that should be fairly simple however the online help was not able to help me after spending several hours looking.

  I am trying to configure a LabVIEW program to write the following sample data in a spreadsheet file (two columns with serial number of first input line and point, and then under this various data) I intend to extend this option to add more data, but just need to get the fundamentals of marketing in the form of work :

  Item serial number

  1                          20

  2                          40

  I have attached my .vi effort to date, however, I can't figure out how to get the formatting to work (i.e. remove the zeros, carriage return or tab).  If anyone can help it would be appreciated.

  Kind regards

  Altenbach says:

  I don't see any code that generates the zeros, carriager returns, or tabs.

  %f used as a format string actually gives you % .6f, should be %d if no zeros on the right are sought.

  I'll add to the endless possibilities, assuming that build you a file over time.  Write labels at once, and then add the file in a loop.  I find this method is safer, then creating a string if the program takes a long time to run.

  

  If you have all the values at once, follow the other suggestions to build a string and write it then.  A simple way is to remove the loop in my excerpt and the wire of the array 2D directly to the second write in File.vi of the worksheet.  Without looking, I bet that something similar is one of the mods of altenbach.

• Write to the worksheet only if the file name is different

  Hi all

  I'm trying to write some code, but to no avail. Basically I have a file name to each time interval (say 2 seconds). I built a small table for example.

  The names of files in the table are repetitive and I don't want to write the data in the worksheet, if the file name is the same.

  Bascially, I need to write the header and the table for the 1 c:\1.txt files and after c:\1.txt the data (more than 3) I want to only write the table only (no header) and add it to the worksheet.

  That is to say for c:\1.txt file, it will consist of 1 header and 4 sets of table.

  Then the process is repeated again until a newfilename (c:\2.txt) is encountered.

  c:\2.txt will also include 1 header and 4 sets of data.

  Can anyone help on this?

  Your loop is you allowing to read beyond the end of file names in your table. This passes an empty file name write it on the spreadsheet VI which requires to ask the name of the file. You should test this condition.

• Waveforms of writing to the worksheet to help to write on the worksheet vi

  Hello

  Problems with writing 2 waveforms of the myDAQ to a worksheet. Using the "write on the worksheet vi.' does not work as it records in the file, but when you open the file to look at the results, there is no data." I got a screenshot of used vi, unfortunately the file as an attachment could not be validated. Someone sees the problem and no solution?

  http://i50.Tinypic.com/2isil8w.jpg

  Thank you

  You need to do a little basic troubleshooting. Make a right-click on the son goes into the loop, and selection "probe". After you run the VI, the content of the probe and see if there is no data there. I had to put a delay in the loop of the acquisition or specify a number of samples to get the data in a consistent manner.

• Write on the worksheet while loop problem

  Hello dear Labviewers. I have a 'writing on spreadsheet"with a table 2D DBL connected on it, but the problem occurs inside the while loop. I want exactly those time six values in my excel document, but it restarts after every "two seconds" and I cannot get rid of this problem. I want exactly the same numbers in the Excel document as it is in the table.

  I tried to move the two "write to the spreadsheet' boxes outside the while loop, but the Excel document does not display a single value in the table, when I do this. It shows that the two headers

  My second problem is rounded off on the numbers. Even if I wrote "%.6f" in the part of the format, it gives me a single decimal value.

  Thanks in advance

  Orlando

  

  Orlando says:

  Thanks for the help Ravensfan

  But the "worksheet to write" not a not an output port, then how can I do this?

  I downloaded my VI

  I never said anything about writing about a spreadsheet file with an output port.

  See the attached VI for changes.  It's only the new data of this iteration of the loop that will write it on the spreadsheet file VI, not made all of the table from all iterations.  There is an entry of table 1 d to the spreadsheet file.

• list box given to the .csv file using write on the worksheet File.vi

  Hi, I use the write on the worksheet File.vi to write data multicolumn ListBox to the .csv file. If I do record from Excel, the pop-up window shows as an attachment. And data listbox are too different.  I want the data displayed in the first line not the second row (third photo).

  Thank you for your help.

  Before making your Save As in Excel, change the cell formatting of number. This should avoid the scientific notation conversion before you re-register.

  Or just use Notepad to display the file instead of Excel.

• Write to the worksheet as 2D gives me zeros?

  I have a chart that I built enter an entry in the spreadsheet, and even if the first column out allright, the following three are only zeros? Would it because they are so few? and if yes how I fix this. Here's my VI

  Pazmush wrote:

  I have a chart that I built enter an entry in the spreadsheet, and even if the first column out allright, the following three are only zeros? Would it because they are so few? and if so How to solve this problem. Here's my VI

  1) press Ctrl + h to open the Help window.

  2) float above the worksheet function writing.

  (3) entry to respect the labled albums "format".

  (4) make a right click on the SS service and choose Help.

  (5) read the explanation on the input format.

  (6) change the format entry by creating a constant and even editing for your needs.

  If the format is not the issue. create a probe for the data and verify that your actual data are. It may just be zero.

  Ben

• How to use write to VI of the worksheet

  Hello

  I want to record the incomming data collected from my experience in a worksheet that can be opened in Excel.  I used the worksheet vi entry but when I run the program file is not generated.  I enter the path to the file and run the program. When I stop the program, however, no file exist.

  I'm using Labview 8.6 and have my program attatched.   Any suggestion would be appreciated.

  Thank you

  Are you prevent the program with Boolean thefront Panel? After changing that first all looped, I ran it and it created a file.

• Structure of the problem of the worksheet

  Hello to all and many thanks for helping me to get as far as I am, on my first LV project. I have attached my project below. My program is running good, however, when he wrote in my spreadsheet, it gives adverse effects. I open the MS Excel spreadsheet. What I'm trying to do is to get all of my reading (entries 1 - 5V) in the same column, one under the other, starting of course with the 1 volt. I put the transposed to "T" and it has at least put in order but not in the same column. I have read the help file to this topic and tried a few different things, but it is having no effect. Any help would be greatly appreciated. Thank you

  I have "simulated" your code, get out all the DAQ stuff, just to test writing to the worksheet.  The code below gives the results presented in the form of text of the essay.  In addition to the extra lines of zeros, it seems curious that you do not want to write the data in this way (but there may be a very good reason to do so).

  I made a trivial change in the code (I think Taki has made a similar suggestion) and got the output displayed in the text of Test1.  If it is, in fact, what you hope to achieve, then you are close...

  

  

  Bob Schor

• Writing in the worksheet

  Hi all. I have my attached Vi, which does nothing more than feeding an output voltage of 1 to 5, each 3-seconds, unless you press the stop button. I don't like the stop button, I chose because, if accidentally put in true state before you run Vi, it throws an error I do not know how to recover from. However, this isn't what concerns me is, for the moment. I'll try to fix it on my own first. What I am not sure do now is to know how to write a value in each case on a spreadsheet structure. I tried to use arrays and store the data of each case of effluent to a location on the table, without a bit of luck. I went through section 1 basic tables to see what I'm doing wrong, did not help me. It must be much easier I have do it. First of all, am I right to assume that I must first write this in a table, and then transfer the data at the end of the cycle Vi, or should I write directly to a worksheet after the close of each business structure? I thank very you much.

  
  

• Error when run through the function of path to add-in with writing to the amusement of the worksheet

  Hello world

  I wondered why the error no. 7 is coming as being attached, when I run the program.

  My intention is to write (from the FIFO) data in the worksheet by using entry for measuring function. I connected 1 d table at the entrance of table 1 d of this function. I connecetd the file port add this sub VI to the controller of the file add. I couldn't connect with indicator file add. Wire broken watch by doing this.

  Can you give me a suggestion needed to overcome this error and accomplish my data record using this sub VI (write to spreadsheet.vi)?

  Required attachments are provided for your convenience.

  Thank you.

  
  

• Data loss when writing to the worksheet

  I worked on a VI to acquire data from two instruments and save them in a spreadsheet. To do this, I wrote two screws slot for data - one for a scale and the other for a conductivity meter and temperature. Regardless, each sub - VI works well; However, the conductivity meter sometimes writes a 0 value in the worksheet in the main VI. I thought it could have been a problem with the sub - VI, so I wrote a small article to catch and eliminate any 0 result product (I've put in place to collect an array of results and get the average to reduce noise). It did not work and every 5 or more data points, he writes a strange value or NaN. I think there is a loss of data in main VI caused by one of a few things:

  -The response time of the scale is the order of milliseconds, but the response time of the conductivity meter sends a signal every 5 seconds. This difference would cause a loss of data?

  -In the main VI, the scale readable Subvi is configured to perform a loop for to generate the table in the main VI. On the sub - VI conductivity, I configured it to run the loop in the Subvi. This difference would result in a loss?

  I have attached a few pictures of the block diagram to help.

  Thanks for the help, guys!

  I thought about it. By running the loop inside the Subvi, rather than in the main VI, he was losing some data as it came out (?). In any case, once I put in place similar to the VI scale reading, everything worked fine. I think that, anyway. It will not look like you guys don't have nothing, but forcing me to put the problems on paper has helped tremendously. Thank you!

• Array of strings of text written in the worksheet in LabView 8.0

  Hello

  I've used LabView 8.5 to perform the next action, but as I am now working on another system I'm currently forced to use LabView 8.0 (Windows XP) and would like to avoid the upgrade to LV8.5 +. However if I can't do the following so I'll have to!

  I am wanting to create a worksheet and I use the 'Write to worksheet File.vi' block in LabView. However, as I want to have included column headers, I build an array of strings using the block 'building the table '. This table is then injected into the entry "1 D data" on the block "write to the worksheet. The format for the spreadsheet block is defined by a string with '%s' to enter the entrance of "Format". In LV8.5, the table connects well, but in LV8.0, when I connect the output of the array of strings to the 1 d data entry, the wire becomes broken. The same happens when I use the 2D data entry.

  If I don't do something wrong, how can I put headers in my spreadsheet file? Is it possible in LV8.0, or should I upgrade?

  Thanks for the help!

  There are also detailed instructions on the block diagram of the writing on a file spreadsheet on how to modify it to write strings. Be sure to save it under a new name and in a new location.