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TP/TARGET tables do not appear to be saved beyond 1275 entries

TP/TARGET tables do not appear to be saved beyond 1275 entries

Posted on Nov 2, 2020

DWQA Questions › Category: NHP KINARM Exoskeleton › TP/TARGET tables do not appear to be saved beyond 1275 entries
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Jonathan Michaels asked 9 months ago

I’m using the functionality of Dexterite 3.8 to run task protocols with 2000 unique trials. However, when I load the logged data, it appears as though the TP and TARGET tables don’t go beyond 1275 entries. The entries are split up into 5 sections, for example X, X_2, X_3, X_4, X_5, each of length 255 (I assume because of data type limitations), but 5 of these only covers up to 1275.
Am I missing something?
 
Thanks,
Jonathan

1 Answers
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Best Answer
Duncan McLean Staff answered 9 months ago

Hi Jonathan,
You’ve run up against a limitation of the data saving format that we have historically used. The C3D format only allows us to use a certain amount of memory to store parameters before the file becomes corrupted. When saving out all of the parameters (which includes tables) the tables can be trimmed back in the manner you are seeing in order to fit into the file. This only happens when the number of rows in the tables is quite high as you have seen, tables with even 500 rows would never be trimmed.
For the moment, the dtp file used to create your exam ZIP file is stored in the ZIP file, so you can extract the dtp and use MATLAB’s built in XML parser.
In the next version of Dexterit-E (3.9) the storage format has been updated extensively to avoid problems exactly like this one. From your point of view analyzing data you will not notice a difference.
All the best,
Duncan

Jonathan Michaels replied 9 months ago

Thanks Duncan. Importing the .dtp is a bit annoying, since the tables are just constructed as big blocks of characters. For now, I’ll save a separate file when I create the .dtp that has all the required information, and I’ll look forward to the release of 3.9.

Jonathan Michaels replied 7 months ago

Hi Duncan, any idea when Dexterit-E 3.9 will be released? Being able to read all trial data from the saved files would make my analysis pipeline significantly simpler.

Duncan McLean Staff replied 6 months ago

Hi Jonathan,

We’re just started the release testing for 3.9. That should mean we will be ready for release around the end of February.

Cheers!