Array to spreadsheet eol

I am using array to spreadsheet. I notice that there is always a eol at the end. Is there a easy way to get rid of the eol? Thanks!
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smercurio_fc, I knew I saw that somewhere.
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Arrays or Spreadsheets? Help with School Excercise

Hello there, my Control Systems Engineering professor will make us a LabView test in a couple of weeks, although he won't actually teach us the software, but rather we need to get our hands dirty. Anyways, I'm trying to resolve this excercise:
Problem Definition.
On a storage area of a container terminal containers are stored temporarily waiting for further transportation. The location of a specific container along with its code is stored in a database. Whenever the operator types in the code of a container, the according location is shown on the screen.
Demands.
- Take as storing area a rectangle of 3 rows of 4 positions horizontal and 2 positions vertical (24 containers).
- Each containers is identified by a unique alphanumerical code of 11 digits. Digit # 11 is the check digit, being the last digit of the sum of the previous 10 digits based upon the ASCII table.
- When filling the database, the user myst apply the code of the container and its location.
- When searching for a container, the operator applies only the code of the container. On the front panel the according location must be displayed by the program.
- If a container is not found it must be reported by means of an error message.
- If an incorrect container code is inserted it must be reported by means of an error message.
What I've done so far:
I've made a UI and code so that I can type a 11 digit string and the VI will indicate me if its a valid code or not, based in the comparison of the 11th digit.
What I need:
Next step, I believe, is that if the code is valid, I should store it in a database along its position. I know that there is a Database toolkit for LabView, but you must agree it is impractical as this is just an excercise. I was thinking about making an array or a spreadsheet, but have no experience with it. Also it seems that arrays work best with For and While Loops, but I might be wrong... and how can the user assign its position?
Well, thanks all in advance for ANY suggestions. Everything is welcome.
Pohl.

Hello,
Take a look at the following link:
http://zone.ni.com/reference/en-XX/help/371361B-01/lverror/too_few_format_specifiers/
it explains this error and also gives a link to the format you should use for this function.
Regards,
RikP - National Instruments Applications Engineering
Rik Prins, CLD
Applications Engineering Specialist Northern Europe, National Instruments
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Array to spreadsheet string. Empty formatter ignored. BUG

when you want to create an array string that has no seperator you cannot use the Array To spreadsheet string function:
This is a bug in my opinion.
Ton
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My LabVIEW Ideas
LabVIEW, programming like it should be!

smercurio_fc wrote:
This has been a known issue for a LONG time. Technically, it's not a bug since the behavior of the function is correct based on its design. It uses a default value of a tab if it receives an empty string. It's no different than with VIs having a default value for a control.
I disagree with that. Our own VIs behave like that since we don't know if anything is wired to a terminal or not. But many LV primitives work differently if you wire something or not. Index Array for 2D or higher dimension arrays for instance works differently when wiring a 0 (default value) or leaving the terminal unwired.
So I would expect the primitive to accept an empty string.

Array to Spreadsheet String VI truncating my rows

I'm using Labview 8.0.
In my VI I am feeding the "Array to Spreadsheet String" VI an array of strings that are in the following format.
7/09/2010 7:43:23.27472 95.284953
7/09/2010 7:43:23.27572 95.284953
7/09/2010 7:43:23.27672 95.284953
7/09/2010 7:43:23.27772 95.284953
The first entry is the data, then time, then data.
The problem I am having is that when I pass this array of strings through the "Array to Spreadsheet String" VI it cuts off the entries and I get the following:
07/
07/
07/
07/
The format I feed to the VI is <%s> for string. Any help would be great. Thanks!
Solved!
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Hi Emike,
for me this works:
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Reading fixed position files with File Adapter

Hi !
I'm trying to use the file adapter to read a file with data in fixed positions .
I cannot get it to work, I'm getting :
[Line=3, Col=133] Expected "${eol}" at the specified position in the native data, while trying to read the data for "element with name Hours", using "style" as "array" and "cellSeparatedBy" as "${eol}", but not found.
Ensure that "${eol}", exists at the specified position in the native data.
and don't understand what the problem is.

Sorry I didn't reply sooner.
If you are only interested in the first 133 characters then as you stated you need to put in a dummy filler at the end.
The file adapter is not as smart as you think. What is does is reads the string in a stream, so it gets its command and reads the stream until it hits it, then it gets the next command.
In your situation you said read 1 - 133 thinking it would ignore the other characters in the line. In reality what happens is that it reads the first 133 characters. Assuming that it wasn't looking for a end of line it would then read the next 133 characters. This would include the character you want to ignore, so your pattern would fail.
Good way to think about it is to apply the rules as if you are reading the file your self. In your mind you say read these characters then I want to ignore all the others in the row. You have to tell the file adapter to do the same.
Hope this explains.
cheers
James

Array To Spreadsheet String -- Convert EOL Option

The Array To Spreadsheet String and Spreadsheet String To Array functions should provide an option for (not) converting EOL (end-of-line) to platform-dependent ones. I am thinking of something similar to the Write/Read Text File options where you can place a checkbox in the context menu "Convert EOL". As per default such checkbox need to be checked for compatibility reasons.
Possibly another option/checkbox for not appending the final EOL would be nice, maybe "Final EOL" checked per default as well.

Hi aschipfl,
some thoughts about your suggestion:
- When you want to suggest improvements to LabVIEW you should post in the Idea Exchange.
- NI will not change the behaviour of functions existing for a long time…
- NI will probably update the LabVIEW help for that function…
- a spreadsheet string needs some kind of delimiter, what's the purpose of creating a spreadsheet string without them?
When you really need a "Array to Spreadsheet String" without delimiters you could take this approach:

Array spreadsheet format

Anyone can help I have a CAN message logged from a TDMS file and wanted it to convert to a csv or a txt file with the following channel groups:
CAN ID, CAN Message, Timestamp, TX/RX
However the result that I got on my text file is not the same as the result from the TDMS.
I mean the layout becomes like this:
CAN ID, CAN Message,
Timestamp, TX/RX
I am wondering why does the Timestamp and TX/RX were put on the next line?
This is the snapshot of my code, anyone can help?
Thank you

Your real problem is likely in the program that creates the TDMS file. It is likely adding the End Of Line characters to the data string. My magic 8 ball says you use Array To Spreadsheet String on the data to then save it to the TDMS file. You should use the Trim White Space after the Array To Spreadsheet String in order to prevent that.
As far as your conversion program, you can use Index Array to get the data column, a FOR loop with the Trim White Space, and then Replace Array Subset to remove the EOL characters and then save it to your text file.
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Spreadsheet String To Array DBL Performance Improvement

While developing and profiling a batch data-analysis program, I found that the "Read From Spreadsheet File.vi" function was where the majority ofthe execution time was spent. Digging further, I found the time was spent in the "Spreadsheet String To Array" function. Obviously I cannot look inside this function, but I wondered if I can somehow speed it up. Attached is a Vi that illustrates what I came up with as an alternative.
Basically using "Spreadsheet String To Array" only to split it up to a 2D String Array, and then "Fract/Exp String to Number" to convert the strings to numbers.
It consistently runs in just over 60% of the time of using Spreadsheet String To Array on it's own to do the conversion.
I am curious as to why using the two functions is quicker than just the one on it's own? Perhaps NI can improve the internals a bit? Or perhaps it is not a fair comparison?
Labview 8.6f1 Win XP SP2
Message Edited by pauldavey on 03-25-2009 02:55 PM
Attachments:
Speed Test Spreadsheet String to Array.vi ‏26 KB

Adding a couple of other conversions to test against i noticed that:
1. Scan from string through a double loop was the slowest
2. Scan Value was slightly faster
3. Direct conversion through Spreadsheet to array as in OP
4. 2-step convert through Fract/Exp.
Could it be that Spreadsheet to array uses Scan Value internally?
/Y
LabVIEW 8.2 - 2014
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Possible bug: Saving array with extended and double precision to spreadsheet

If one concatenates a double precision array and an extended precision array with the "build array" vi and then saves using "Write to Spreadsheet File" vi any digits to the right of the decimal place are set to zero in the saved file. This happens regardless of the format signifier input (e.g. %.10f) to the "Write to Spreadsheet File" vi.
I am on Vista Ultimate 32 bit and labview 9.0
This is a possible bug that is easily circumvented by converting to one type before combining arrar to a spreadsheet. Nonetheless, it is a bug and it cost me some time.
Solved!
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Attachments:
Spreadsheet save bug.vi ‏9 KB

Hi JL,
no, it's not a bug - it's a feature
Well, if you would look more closely you would recognize the "Save to Spreadsheet" as polymorphic VI. As this polymorphic VI doesn't support EXT numbers internally (it only supports DBL, I64 and String) LabVIEW chooses the instance with most accuracy: I64 (I64 has 64 bits precision, DBL only 53...). So your options are:
- set the instance to use as DBL (by right-click and "Select type...")
- make a copy of this VI, save it with a different name and make it support EXT numbers (don't rework the polymorphic VI as you would break compatibility with other LV installations or future revisions)
And yes, those coercion dots always signal some conversions - you should atleast check what's going on there...
Message Edited by GerdW on 05-21-2010 10:01 PM
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Columns for spreadsheet with arrays

I have a data acquisition program that saves arrays as .txt files for
further analysis. I'm writing a program and having problems getting the
data in 4 columns like I want.
My data consists of 4 files, 10 data points obtained per iteration.
Each iteration is saved as a new column. The files have a lot more that
2 columns in reality. For example
A B C D
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
I would like som
e help in getting my 4 files put into one file,
consisting of 4 columns only. I would like my data to look as follows.\
A B C D
1 3 5 7
1 3 5 7
1 3 5 7
1 3 5 7
1 3 5 7
1 3 5 7
1 3 5 7
1 3 5 7
1 3 5 7
1 3 5 7
2 4 6 8
2 4 6 8
2 4 6 8
2 4 6 8
2 4 6 8
2 4 6 8
2 4 6 8
2 4 6 8
2 4 6 8
2 4 6 8
and so on. Essentially I want to take each iteration of data and place
underneath the previous iterations data in one column. I have tried
many different methods with for loops and various array tools and can
not get it right. Any ideas and help would be greatly appreciated!
Heather
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Before you buy.

> How about...
>
> If you open your text files into strings, then 'match pattern' within
a
> while loop or otherwise search the strings to replace any 'newline'
> characters with Tabs. If you then convert the string to an array, you
should
> have one long row. You can then transpose this to one long column with
one
> of the array tools - 'reshape array' maybe - I can't remember. If you
do
> this for all 4 files, then use 'build array' to stick them together,
you
> should get what you want.
>
> Paul
>
>
Paul,
Thanks for your help. I used the match pattern to find and replace
the new line characters with tabs. The four columns have 10 data
points, then two zero's separating them from the next 10 points. I used
the same idea to get rid of the retur
n characters and replace them with
tabs, which got rid of one row of zeros. I've tried the same idea using
backspace, form feed, space characters, etc, and I still have one row of
zeros separating my data points. Do you have any idea what this
character could be? I tried all of the characters in the manuals and
none will get rid of this problem. Again, thank you very much for your
push in the right direction!
Heather
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Before you buy.

1D Array of Cluster of 2 Elements Write to Spreadsheet

Hi all, first time using LabView in many years. I am trying to write a VI that will acquire data from our cDAQ (right now just trying to get it to work with a single thermocouple in a NI 9211, but eventually will be 8 X thermocouple, 4 X pressure transducer), display it in realtime on a plot, and then when the acquisition is stopped, output the data to a file for later use. I am currently using the Base LabView package.
My problem (as I remember it was 7 years ago when I last used this) is with the data types not working together. This is my thought process currently on building this VI. Everything is inside a While Loop with the Wait function at 1000ms.
- Acquire a point of data using the DAQ assistant
- Send that point of data into a bundle
- Send the iteration count into the same bundle (as a timestamp)
- Send the resulting cluster of 2 elements into a Build Array function
- Send the resulting 1D array to a shift register in the While Loop, as well as to an XY graph for realtime plotting
- Wire the incoming point on the shift register back into the Build Array function
In my mind, this allows the XY graph to plot the complete array every iteration, giving a realtime view of the signal. Everything works fine up to this point. My problems are:
When I stop and restart the program, the shift register is not cleared, so the existing data in the array remains on the graph. I know I need to initialize the shift register to clear it, but I cannot figure out what to wire to it that will be compatible with the data type (I just get broken wires with everything I tried).
Similarly, I cannot figure out how to output this data to a spreadsheet after I Stop the While Loop. I think I should wire the "Write to Spreadsheet File" VI to the outgoing shift register, but again, I can't get compatibility with data types (source is a 1D array of cluster of 2 elements).
I have attached my current program "Production" to this post.
I look forward to the help!
Brad
Attachments:
Production.vi ‏46 KB

Hi Brad,
I would suggest you change your architecture. First, to answer your questions:
1.
In order to ensure that your shift register is not reading the last
value from it's memory location, you just need to create a constant for
the shift register. To do this, right-click at the input of the
'left-placed' shift register and create a constant.
2. The Write
to Spreadsheet is expecting a 1-d or 2-d array while you are wiring a
Dynamic Data Type. Use the Convert from Dynamic Data Type to convert
the data into the appropriate waveform after which you can get the
waveform attributes which includes the values and the timestamp data. Or, you can use the Write to Measurement File to write to a .lvm file which can be opened in Excel as well.
Changes to your architecture:
Since
you are using a lot of channels, I would advise you use a
producer/consumer architecture. You can have a look at this
architecture by navigating to File -> New.. and searching for the
Producer/Consumer template. You will notice that this architecture uses
queues. The way you will design your VI is to use DAQ to acquire the
data into your producer loop, convert this data into a waveform and
then send this data to the consumer loop via queues. In your consumer
loop, you can write this data to a file. At this point, I would
encourage you to write to a binary file instead of a spreadsheet file. The write will happen faster and you will be using less space on your hard disk when compared to ASCII writes.
I know this can be real confusing for a beginner, so be sure to post back if you have any questions.
Adnan Zafar
Certified LabVIEW Architect
Coleman Technologies

Spreadsheet string to array slow?

We have an apllication here where we would like to save all our data 120
files with 4M each and then read it back.
I ve changed now to zipped files, but reading from the disk seems not to
be the problem. I used 'profile' to analyze the time consumption. I
think it might be the 'spreadsheet string to array VI' which makes it so
slow, 1 second is a lot to sort 450k numbers. (BTW its a win2000 PC of
this year)
Any hints how to improve it?
Best Regards
Urs Bögli

hi,
I do this small program. Program generate, write and read array with double precision. I generated array with 1.000.000 rows and 10 columns. Read is fast in this program, because file is 'cached' in Windows Virtual Memory.
When you close LabVIEW and try read file with second VI on my PC I need 3 second for this array [on the disk have file 80MB].
It is programs in LabVIEW 7.0
Attachments:
readArrayFile.zip ‏186 KB

Spreadsheet string to array notation

Hi all,
I am using the spreadsheet string to array function and basically my problem is as follows:
My inputs are in scientific notation so I use this in string format. The data is separated with a ",". What I get is just the argument rounded.
As I just realized I didn´t make myself clear I´ve attached a photo of the problem. Notice that probe 4 is the input from which I want to build the array, and probe 5 is the output. I just have the 9 but what happens with the rest of the number?
PD: I´ve tried many formats but none of them seems to work.
Thank for your help
Solved!
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Attachments:
notation.png ‏145 KB

Your system is set up to use a comma (,) as the decimal point? Try using "%.;%^.3e" for your format. The "%.;" tells the scan to use the period as the decimal point.
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How can i read the number of lines written - in spreadsheet array?

hello NI,
I am writing file as spreadsheet format continuously, contains date, time, chanel1, channel 2, channel 3..... etc.
i just want to know how many lines has been written after file write....
Regards,
Balaji DP

You count the number of line termination char. Se example
Besides which, my opinion is that Express VIs Carthage must be destroyed deleted
(Sorry no Labview "brag list" so far)
Attachments:
sample.PNG ‏25 KB

Can you pass an array URL variable

Hi,
Doing a form which I want to validate, then re-display with
error messages and the keyed data still in place should there be
errors, or go onto a second form if all ok.
I have tried to use <form
action="<?=$_SERVER['PHP_SELF']?>" but as the various
outcomes result in different screens I can't see how to do it
without having reams of duplicate code - I couldn't make it work
satisfactorily anyway.
So I decided to do it in two stages - form (user screen) + a
separate validation routine which passes validation results back if
there are errors by calling the first screen but with URL variables
to trigger process variations or go onto screen 2 if all ok.
But I'm struggling with this .. two questions:
i) Ideally I would like to use a session variable to pass
actual error messages back to screen one in the event of errors but
if I undertand things correctly (which is by no means certain)
$S_Session is already an associatve array so it wouldn't be so easy
to just add a variable number of messages to it and then know what
you are unpacking elsewhere ... do you know what I mean?
Perhaps if I give you my second question it may help
illustrate what I'm going on about in part 1
ii) The way I have tried to do it is to set it up as an array
($ERRORS) in the validation module and then added a text string
each time I hit a specific error. The hope was that I could then
send this back via the URL for further process but I'm getting
syntax problem so maybe this is not possible .... a brief example
Input Form php:
$ERRORS = array();
$ERRORS = $_GET['errors']
if (sizeof($ERRORS) > 0) {
echo "<p class=\"val_err_hdr\"> *** Validation
error(s) - please correct the entries and try again ***
</p>";
blah blah
Validation php:
$ERRORS=array();
if(!$loginFoundUser) {
$ERRORS[] = "This e-mail address entered has already been
registered on our database - if you have already registered you
can"; }
header("Location: input.form.php?errors=$ERRORS");
When I run this I get a syntax error 'unexpected T_IF' on the
'sizeof'' function condition.
Any help much appreciated.

.oO(patricktr)
> Doing a form which I want to validate, then re-display
with error messages and
>the keyed data still in place should there be errors, or
go onto a second form
>if all ok.
OK, quite common.
> I have tried to use <form
action="<?=$_SERVER['PHP_SELF']?>"
Avoid short open tags, they are unreliable. Use "<?php
print " instead
of just "<?=" to be safe and independent from the server
configuration.
>but as the
>various outcomes result in different screens I can't see
how to do it without
>having reams of duplicate code - I couldn't make it work
satisfactorily anyway.
What's a "screen" in this case? Just another part of the form
or a
completely different page?
> So I decided to do it in two stages - form (user screen)
+ a separate
>validation routine which passes validation results back
if there are errors by
>calling the first screen but with URL variables to
trigger process variations
>or go onto screen 2 if all ok.
Don't use URL parameters in such a form processing scenario.
Use a
session instead, that's what they are for. The length of URLs
is limited
and there are things you simply don't want to pass between
pages, but
keep on the server instead.
> But I'm struggling with this .. two questions:
>
> i) Ideally I would like to use a session variable to
pass actual error
>messages back to screen one in the event of errors but if
I undertand things
>correctly (which is by no means certain) $S_Session is
already an associatve
>array so it wouldn't be so easy to just add a variable
number of messages to it
>and then know what you are unpacking elsewhere ... do you
know what I mean?
The $_SESSION array itself is strictly associative, the used
indexes
must be strings or the serialization of the session data will
fail.
But if course you can always do things like this:
$_SESSION['errors'] = array();
$_SESSION['errors'][] = 'something went wrong';
> Perhaps if I give you my second question it may help
illustrate what I'm going
>on about in part 1
> ii) The way I have tried to do it is to set it up as an
array ($ERRORS) in the
>validation module and then added a text string each time
I hit a specific
>error. The hope was that I could then send this back via
the URL for further
>process but I'm getting syntax problem so maybe this is
not possible .... a
>brief example ...
As said above - use the session instead.
> Input Form php:
> $ERRORS = array();
> $ERRORS = $_GET['errors']
There's a ';' missing at the EOL (this causes the error you
mentioned
below).
Just a naming hint: Variables should not be named all
uppercase (except
for the predefined superglobal arrays). Such names should be
reserved
for constants. The most common style looks like this:
myNiceFunction()
$myNiceVariable
MY_NICE_CONSTANT
> if (sizeof($ERRORS) > 0) {
if (!empty($_SESSION['errors'])) {
> header("Location: input.form.php?errors=$ERRORS");
The Location URI must be absolute including scheme and
hostname. This is
required by the HTTP spec:
header("Location:
http://$_SERVER[HTTP_HOST
But I'm still not sure why you would need this redirect. The
entire
handling of a form (validation, processing) can be done on a
single
page. Only if the processing succeeds, you might want to
redirect to
some result page.
Micha

Array to spreadshee​t eol

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