Python block in altair activate

Linn Liao
Linn Liao New Altair Community Member
edited April 24 in Community Q&A

Hi,

I'm trying to calculate a matrix using this python block, and while the same code works on python, it does not work here. Is numpy arrays not supported?

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The error message says:

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Best Answer

  • RSGarciarivas
    RSGarciarivas
    Altair Employee
    edited April 24 Answer ✓

    Hi Linn,

    vssGetInputData will import the data as an an ndarray. Therefore, adding [0,0] at the end of lines 8 to 14, like this:

    a1 = apis.vssGetInputData(block,5)[0,0]

    Should give you the floats you need.

    Also, make sure the output size is correct in the Ports tab of the block. In this case, I believe it should be a 4x4 matrix, right?

     

    Rafael

Answers

  • RSGarciarivas
    RSGarciarivas
    Altair Employee
    edited April 24 Answer ✓

    Hi Linn,

    vssGetInputData will import the data as an an ndarray. Therefore, adding [0,0] at the end of lines 8 to 14, like this:

    a1 = apis.vssGetInputData(block,5)[0,0]

    Should give you the floats you need.

    Also, make sure the output size is correct in the Ports tab of the block. In this case, I believe it should be a 4x4 matrix, right?

     

    Rafael

  • Linn Liao
    Linn Liao New Altair Community Member
    edited April 24

    Wow, thanks alot! And you even replicated it in the twin activate :O I guess in my next question I could leave a file instead of screenshots.

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