How is cluster of 5 elements converted to spreadsheet?

I have a bundle output as a Cluster of 5 elements. The cluster is displayed on the front panel. I desire to convert that to write that information to a spreadsheet that can be opened with Excel.
Please email me at: [email protected]

Hi DocNord,
easiest would be to create a tab seperated textfile of your values: Unbundle the elements, convert them to text with tabs between the single elements and write it to a txt-file.
More hints:
- When all elements are of the same type you can/should use an array instead of a cluster.
- There are functions to write spreadsheet files directly from 1D/2D arrays.
- There's a function to convert a cluster (of elements of same type) to an array (and also vice versa).
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

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How do I convert a 1-D array of cluster of 5 elements into a 2-D array of numbers? (history data from a chart)

Hello,
in my vi I have a chart with 5 Plots displaying measurement data.
The user should be able to save all the history data from the chart at anytime. (e.g. the user watches the chart and some event happens, then he presses a "save"-button)
I know, that I can read out the history data with a property node. That is not the problem. The problem is, how do I handle the data? The type of the history data is a 1-D array of cluster of 5 elements.
I have to convert that data somehow into a 2 D-array of numbers or strings, so that I can easily save it in a text-file.
How do I convert a 1-D array of cluster of 5 elements into a 2-D array of numbers?
I use LabVIEW 7.1
Johannes
Greetings Johannes
Using LabVIEW 7.1 and 2009 recently
Solved!
Go to Solution.

Gerd,
thank you for the quick response and the easy solution.
Look what I did in the meantime. I solved the problem too, but muuuch more complicate :-)
And I have converted the numbers to strings, so that I can easily write them into a spreasheet file.
Johannes
Message Edited by johanneshoer on 04-28-2009 10:39 AM
Greetings Johannes
Using LabVIEW 7.1 and 2009 recently
Attachments:
SaveChartHistory.JPG ‏57 KB
SaveChartHistory.JPG ‏57 KB

How to name elements and create cluster of named elements

I wanted to detail the steps I found, so that others could more easily follow what I found going through these discussions. While there are numerous examples, they lack details such as function names and how to achieve the steps. Most of them seem to cover only arrays. I welcome corrections. I'm not saying this is the best way; it is, however, a simple detailed description of one way to do it.
I wanted to create a cluster of various data types that could then be manipulated by name. Unfortunately, simply wiring an existing cluster to a Bundle by Name.vi does not assign the existing labels of the elements to the name field of the cluster. I don't know why.
1. Create an input cluster with dummy constants of the proper data type for each element.
How do you create an input cluster? Searching functions finds no "Input Cluster" function.
The only way I found was to place a dummy Bundle by Name.vi , right-click at the top of the leftmost of the two rectangles and select Create, then Constant. The result looks like the attached Creating Input Cluster.PNG
You might as well delete the Bundle by Name.vi at this point, because the changes make to the input cluster will only be reflected when it is connected to a NEW Bundle by Name.vi
Next, for my purposes, I needed constants for DBL numeric, string, and array of strings. I started by placing one DBL and one string constant on the block diagram. I copied these to create the ones I needed. Make the labels visible and type in the names corresponding the Bundle Names desired.
Since there is no function called "String Array constant", it is necessary to place the "Array Constant" function on the Block Diagram, then drag a string constant into the empty right hand square of the Array Constant. It immediately changes color to show it is a string array.
Drag each of these constants into the input cluster so that they appear in the order desired. It is a bit of a pain because the square resizes tightly around the existing elements after each insertion. You have to keep expanding the box at the bottom by dragging its sizing handles, so you can be sure each item is added to the bottom of the list. When done, my input cluster looks like Completed Input Cluster.png attached.
2. Place a NEW Bundle by Name.vi on the Block Diagram. Wire the input cluster to the top of the left rectangle of the function. Drag the down sizing handle of the Bundle by Name.vi until all the elements of the cluster are visible. You will see the names and it will look like Bundle by Name with assigned names.png attached.
3. All that remains is to connect the data wires for the individual elements to the left side of each named block and wire the output cluster. The result is shown in Complete design producing cluster of named elements.PNG attached. (Since only three attachments seem to be allowed, this last will be in a follow-up post.)
Attachments:
Creating Input Cluster.PNG ‏3 KB
Completed Input Cluster.PNG ‏3 KB
Bundle by Name with assigned names.PNG ‏8 KB

I wanted to add a brief statement about EDITING cluster controls because newcomers to cluster usage (like myself). The HELP is good on creation but says nothing about modification. While it has been posted other places, I think a "newbie" might appreciate getting this info here.
To edit a cluster control, open the CTL file, then
Add a control by creating the control on the front panel, then save the control.
To remove a a control, delete the control, then save the control file.
(Simple enough)
To modify an existing control
1. Move the control out of the cluster into a blank VI.
2. SAVE the cluster control file (CTL).
3. Modify the control in the blank VI.
4. Drag the modified control back into the cluster control.
5. SAVE the cluster control file (CTL)
NOTE WELL: don't skip step 2.

How can I write a 1d array of cluster with 3 elements to a file?

Hi,
I have to make a "Power spectral densities" analyse from my waveform data. The results from this VI is an array of cluuster with 3 elemments. Now I want to write this array of cluster with 3 elements to a file. And later it must be able to use this file with EXCEL!!
thanks

Hello schloronzo,
make a for loop feeded with your array. Inside the for loop unbundle
the cluster, "format into string" the 3 values, adding the result to
the ones before and collect them in a shift register. Then save the
resulting string to a txt-file. If you make a good format string then
Excel is able to read your txt-file (use tab a separator and CR/LF
after each 3 values aka "csv format").
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

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

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Hey Folks,
How do I attach a cluster of 2 elements data type of wire with a Dynamic data type wire?
Or a Build XY Graph to a curve fitting2.
Thanks for the help.
Ty

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Hello
guys
Id like to get help fom you guys, im try to convert cluster of 4 elements to cluster of 2 elements .
how can I do that?
I show what Im trying to connect
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jonhde077 wrote:
This is the probelem guys how can i solve it
No, that's not the problem. You cannot simply "convert" something until the LabVIEW compiler no longer throws an error unless it actually makes sense. If you have four elements and only want to retain two, there are many possible permutations. What are the four elements, what is their datatype, and what do they represent. What kind of data does the other connector expect?
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Hello,
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Francois

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How is cluster of 5 elements converted to spreadsheet?

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