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Best way to integrate ndarray into ros2 [closed]

asked 2022-04-03 22:05:13 -0500

alluring-mushroom
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Hello, I have a numpy ndarray, and when I try and publish it, I get this error:

AssertionError: The 'data' field must be a set or sequence and each value of type 'float'

Searching around, I see references to numpy in ros1, and also in the ros2 ros2idl_generator_py, however the only way I can seem to publish the array is to convert to a python list, which is expensive. Given that a numpy array is a sequence, is there any way to avoid this conversion?

Thank you for your time!

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Closed for the following reason the question is answered, right answer was accepted by alluring-mushroom
close date 2022-05-05 22:37:26.465267

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answered 2022-04-13 00:28:27 -0500

aprotyas
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There have been some recent PRs on this topic that might give you some ideas:

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Hey , thank you for your reply, and sorry for my late one! There is a bit to unpack with these, and we we are still bound to Foxy. I am unsure how much is back ported, but I will see what options I have here. Again, thank you :D

alluring-mushroom ( 2022-05-05 22:36:53 -0500 )edit

did you end up finding a solution to publishing ndarrays without converting to a list?

waspinator ( 2022-09-10 10:24:33 -0500 )edit

@waspinator,

Sorry, my work pulled me away from this particular path, so I have yet to actually dive into this properly. Goodluck with your future pursuits!

alluring-mushroom ( 2022-09-11 21:35:11 -0500 )edit

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Asked: 2022-04-03 22:05:13 -0500

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Last updated: Apr 13 '22

Best way to integrate ndarray into ros2 [closed] edit

Closed for the following reason the question is answered, right answer was accepted by alluring-mushroom close date 2022-05-05 22:37:26.465267