Write to spreadsheet append to file

Hi,
I have two 2D data from measurement like those:
the first:
-1.000000E+0    5.102000E-10
-9.000000E-1    4.069000E-10
-8.000000E-1    3.149000E-10
-7.000000E-1    2.329000E-10
the second:
1.505356E-2    8.315681E+10
1.556519E-2    8.639427E+10
1.604228E-2    8.955526E+10
I used "write to spreadsheet" function to write to the file, for the second one, i set the "append to file" to "True". However, it will append the data at the bottom of the file. How can I append them side by side like:
-1.000000E+0    5.102000E-10   1.505356E-2    8.315681E+10
-9.000000E-1    4.069000E-10     1.556519E-2    8.639427E+10
-8.000000E-1    3.149000E-10      1.604228E-2    8.955526E+10
-7.000000E-1    2.329000E-10
Thank,
Joyce
Solved!
Go to Solution.

Hi Joyce,
as a spreadsheet file is just a text file with some special formatting codes it will always append at the bottom...
But you can:
Load the first data, attach the new data in RAM (using any order you like), write a whole new spreadsheet file!
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Similar Messages

How can I write to spreadsheet or measurement file the following signals

Hi Friends !
I'm wondering how to write to spreadsheet or measurement file 1 and 0 from my DAQ assistant on this VI :
It's the same VI like this one : http://zone.ni.com/devzone/cda/epd/p/id/6405
Solved!
Go to Solution.
Attachments:
My.vi ‏135 KB

Hey,
You place the Write To Measurement File Express VI on your blockdiagram and route a wire from it's "Signals Input" terminal to the DAQ Assistant's "data" terminal. Like this:
Christian

Write to spreadsheet file.vi is storing data in one row only.

The 8 points of data is going into one column in the spreadsheet. In the "Write to spreadsheet file string.vi" how do I write the 8 points to one row for each cycle?
I got this VI from NI's web a couple of years ago and forgot how to modify this part. I usume it is within the write file.vi.
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I just reread your original post and the way the "Write to Spreadsheet File.vi" that ships with LV works by default is to put 1D arrays into rows. I read your post backwards and told you how to put the data in a column. Sorry.
In any case, perhaps you need to make sure the Transpose input ISN'T true, and that the delimiter IS a tab.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
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"... after all, He's not a tame lion..."
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Some Doubts in write into spreadsheet file function

hi,
i have some problem with writing the values into excel file...if \ found then the values after will write the values in next rows...
for eg. if i give 78/58\46/86 then i will write as in picture i hav attached..
Attachments:
Mod 1.vi ‏23 KB
Untitled.png ‏135 KB

The Write to Spreadsheet File is not the same as writing to Excel -- for that, you should use the Report Generation Toolkit (and there have been a number of posts here, as well as examples that ship with LabVIEW).
That being said, it is not clear (a) what you are trying to do, and (b) what is (or is not) happening. The image you attached looks OK ...

求助: 如何使用write to spreadsheet file.vi 和 read from spreadsheet file.vi, 并且如何定义它们的路径???

请问如何使用write to spreadsheet file.vi 和 read from spreadsheet file.vi,我知道spreadsheet file.vi只支持.txt文件,但我应该在哪里设置它们的路径呢,请各位帮忙指点,能不能具体说明下,谢谢...

write to spreadsheet file.vi 和 read from spreadsheet file.vi,支持.xls文件.
可以在path处设置它们的路径.

Help on fonction Write to spreadsheet file

Hello,
I come on this forum to find a solution for my issue.
I have made a VI which acquires an input voltage and where the user can modify some parameters.
For each iteration of my while loop, I want to save the data in a csv file that's why I'm using the fonction Write to spreadsheet file.
But when I want to use this saved datas in csv format with Excel, the data were saved in string format so not a numeric. My purpose is to have some numerical datas and not strings because I can't do graphics or calculs.
As you can see on the csv saved file, only the iterations of the while loop (column C) are in a numerical format.
Here is my problem, thank you in advance for your help
Attachments:
VI.png ‏22 KB
Excel_saved_file.png ‏11 KB

Looks like you're using regional decimal signs, try "%.;.3f" as format
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV

How can I use "write to spreadsheet" during the data is taking but not the end of all the loops

Hi,
I have to run an experiment on Labview 6 or 5. I don't have Labview 7 on that computer for some reason. My experiment is talking about 1000 hours, and I have a probelm on storing the data. Right now I am using "Write to spread sheet" and I set the "append" to false. And the data is installed at the end of the experiment, that means after 1000 hours. In the mean time if somthing oges wrong like power cut or what, I will lose all the data. So what I want to do is to save the data evertime when the data is took. I tired to set the "append" to true, but it does not let me to choose the "file path"--- when I choose this and select write on new or excisting file, it said" you may not be able to save on a exciting file" and it does not let me create a new file either. If anyone have the lidea like how can I use the "wrtie to spreadsheet" function and at the same time can install the data everytime inside the look, please let me know. Thanks alot.
KL

KL,
It sounds like you want to periodically save your data so it is in smaller files. (great idea) For this operation you will not want to append the data...if something happens to your system while the file is open it could become corrupt and ruin all the data. You need to write the new block of data to a new file every time. Now...this depends on how big your data is...if you only have like 500k of data to write in a block you should probably write several blocks before starting a new file. I don't know enough about how much data you are acquiring. In either case...the write to spreadsheet file.vi will need a different name each time it is called and you will not want to append. Append = false.
-Brett

Write to spreadsheet without prompting each time through a loop

So my goal is to take measurements every 5 minutes (or whatever the time delay is, currently 15 seconds until it is ready to use) for several days. My biggest issue is that it asks me after each run where to save to. Is there an easy fix so that once a location is chosen I would be able to walk away and just let it keep running for days and it would keep appending data into that file after each delay?
My other thought was data logging. The issue I get with trying to log the data is having it be usable. When I choose a blank excel file to log into I get "The data in the VI's log file is incompatible with the VI's front panel." Why is this incompatibile if I have it going ot a spreadsheet that can be saved as a .xls? Any help or suggestions would be appreciated. I attached my program that I have set up. I understand you dont have the Keithley device so you can't run it, but any help would still be greatly appreciated.
Solved!
Go to Solution.
Attachments:
Keithley 6514 Meas Voltage Example.vi ‏44 KB

altenbach wrote:
Dan Stewart wrote:
Is there an easy fix so that once a location is chosen I would be able to walk away and just let it keep running for days and it would keep appending data into that file after each delay?
Connect the new path output back to the path input via a globally initialized feedback node.
What is considered the new path output? I tried attaching the right side of the feedback node to the data as well as the spreadsheet vi. Neither worked. I also tried keeping the left side blank as well as attaching it to the spreadsheet with the right side to the data. I am not familiar with the feedback node and the help section didn't do a ton for helping me. All of the various combinations I have tried connecting the data or write to spreadsheet have all resulted in prompting me for a file each time through the loop still. I attached the most basic thing I tried, but if you would like other combinations I have tried I can re wire and attach those as well.
Attachments:
Keithley 6514 Meas Voltage Example.vi ‏44 KB

Write to spreadsheet problems

I am trying to use the following program to write data to a spreadsheet. It is meant to monitor and record information about various parts of a sputtering machine. However, when run, it gives me a sheet with only the headers on it, and often asks several times in the same run whether I would like to write over the old file. I would like it to just append to the file, rather than rewriting it every time, as that would make the program useless. Why does it not write the data to the file?
Note: everywhere there is a blank node in the file, there is in the real program a string of data from another source that is read at the same time this program is run. The file is provided by a front panel control that I forgot to include in the file.
I've got a sneaking suspicion that Jesus might have been made of bread. Why else did they have to put him in a warm cave and wait three days for him to rise?
Damnant quadnon intelligunt - They condemn what they do not understand.
Attachments:
Write to File.vi ‏42 KB

You've made some pretty obvious mistakes. First, your Open/Create/Replace File is set to "create or replace". The function means exactly what it says. If the file doesn't exist, create it and if it does exist, replace it. You don't have anything wire to the advisory dialog so every time it runs, you'll get a message asking you if you really do want to replace it. Second, you are using the Format Into File function. As the help mentions, you cannot use this to append data to a file. And, you have no data wired to it anyway so all you get is a header.
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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).
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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
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Appending into File using File Adapter

Hi,
I am trying to write to a file, whenever any data is getting inserted into Database table.
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Is there any way out, by which we can append to a file whenever any new entry is coming into database.
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Thanks in advance...
Abhi..

In order to achieve this follow the steps given below:
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How to write heading in the xls file with each of the channel in each column?

Dear All,
While writing the data into the xls file through .lvm method I want the Headong for each channel to be include on each of the column, but i dint know how to do this? is this possible in the LabVIEW from any of the file writing method? if yes how can i do that? please help me.........
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Thanks Chilly,
Its a really fantastic idea, and it works for me too, but the thing inside was every time once it writes the heading and then it write the data again after that it wirtes the heading and write the data, but i ve copup with dat and i ve modified the vi which u ve given to me, i am attaching that vi to with this.
wat i ve done is just putting the write to spreadsheet data vi into the while loop and other all are outside the while loop, which makes the heading to write once and data to write continuosly.
Thanks & Regards,
Nishant Desai
Attachments:
Write channel names_yours.vi ‏25 KB
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Append swf file - Spry.Utils.updateContent - not work

I don't understand this
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Hi Elaine,
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How to append a file in a trigger?

I'm writing from a table to a file, and have created a trigger that works great...however, I need to append the file so it doesn't overwrite the file every time the trigger fires.
Here's the code...but I can't figure out how to append the file instead of just write to the file:
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> It's for an assignment...I think thye're just trying to show us what's possible.
Just as it is possible to show a learner driver to jump a red light, drive on the wrong side of the road, or do doughnuts in an intersection...
But none of this will make that learner driver a good driver. Never mind able to correctly handle high performance cars on the professional circuit.
Sorry mate - what they are showing/teaching you is pure bs. A trigger is not the "same thing" as a callback event in client programming.
And feel free to give them this URL and tell them that I think they are full of it. Let's see how they defend their non-real world, totally irrelevant and wrong assignments in this very forum.

How can I append excel file rather than replace it?

Hi,
I have the attached VI set to write data to Excel, One case structure sends the data to cell B6, the other sends the data to cell B7. The problem is, the data is deleted from one cell when new data is added to another.
I think I want to be able to append the data without deleting other cells. Any ideas?
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Todd
Attachments:
Flow meter write to Excel question.vi ‏180 KB

Toddzilla,
There are a couple different ways to append to excel files. A couple links that might get you going are:
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Append Data to an Excel Document Every Iteration Using Report Generation Toolkit
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Scott A
SSP Product Manager
National Instruments

Write to spreadsheet append to file

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