Writing/Reading Multidimensional Arrays

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Tue, 12/19/2017 - 15:42
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balterm
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Writing/Reading Multidimensional Arrays

Does the LabVIEW add-on support writing/reading multidimensional arrays within a cluster?

This doesn’t seem to work for me, though I am able to write/read single dimensional arrays. 

Any help would be greatly appreciated. 

Thanks,

Max

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Wed, 01/03/2018 - 04:00
angel
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Hi Balterm,

This is not currently supported by the RTI DDS Toolkit for LabVIEW. We have to investigate that possibility. Which kind of 2D array are you using?

Thanks,

Angel.

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Wed, 01/03/2018 - 11:08
balterm
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Hi Angel,

Thanks for the response. I'm using a 4x4 array, with each element type double. It would be great if the RTI DDS Toolkit for LabVIEW could support this.

Thanks,

Max

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Mon, 01/08/2018 - 03:54
angel
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Hi Max,

As the array is not so big, we can workaround it by using a cluster with 4 arrays of 4 elements. Then we can do a LabVIEW translation between this cluster and LabVIEW 2D arrays. The problem is that the IDL representation is not a 2D array. 

If you are using an IDL-based code using the 2D array type, you may want to use a Routing Service Transformation to communicate it with LabVIEW

Attached an example of this workaround for LabVIEW 2013 and RTI DDS Toolkit 2.0.0.104

I hope this helps,

Angel.

File Attachments: 
Package icon 4x42darrayworkaround-lv2013-2_0_0_104.zip
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Mon, 01/08/2018 - 17:16
balterm
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Hi Angel,

Thanks for the example. How would I go about using a Routing Service Transformation to communicatie an IDL-based code with LabVIEW? Is there a specific example you could point me to?

Thanks again for your help,

Max

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Tue, 01/09/2018 - 07:43
Ismael Mendez
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Hi Balterm,

Here you can find a tutorial on how to create customs transformations using Routing Service   https://community.rti.com/howto/rti-routing-service-how-create-transformation-plugin 

to adapt to your purpose consider two transformations: 

 - First one from outside to your LabVIEW application. Use a 4x4 array as transformation input and a 4 1D arrays as the transformation output.

 - The second one from your LabVIEW application to outside. Use 4 1D arrays of four elements each one as transformation input and transform it to a 4x4 output array.

Regards

Ismael

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