Sparse Matrix in Altair Compose

rodolfobibiano
rodolfobibiano New Altair Community Member
edited October 2020 in Community Q&A

I need to store a big amout of data in a matrix but can't find how to use sparse matrix in altair compose. Is there any specific funcion? In matlab I would use 'spalloc'

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Answers

  • L Moretti
    L Moretti New Altair Community Member
    edited March 2020

    Hi Rodolfo,

     

    You can use the function sparse.

     

    For example if you have a full matrix you can convert it in this way:

     

    sparse(eye(6))

     

    Or you can create a sparse matrix specifying the row & col index and the related value. For example:

     

    m = [1 4 10];

    n = [ 2 6 8];

    val = [1 3 8];

    Matrix = sparse(m,n,val)

     

    Hope it helps,

     

    Lorenzo

  • rodolfobibiano
    rodolfobibiano New Altair Community Member
    edited March 2020

    Should I install some type of extension in altair compose to make it work?

    <?xml version="1.0" encoding="UTF-8"?>sparse.PNG

  • L Moretti
    L Moretti New Altair Community Member
    edited March 2020

    Hi Rodolfo,

     

    you should use Compose 2019.3!

     

     

    Lorenzo

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