Set 3-D matrix from matlab of size (MxNxP) that is effectively 2D (M=1, so it is 1xNxP)

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1

Hi,

I am working on a model where I need to run multiple scenarios with data generated in Matlab to set a 3-D matrix, below is a snippet of my code

U = 1:k;
dfP = DataFrame(3, ‘U’, ‘AP’, ‘W’, ‘Pr’);
dfP.setMatrix(Pr, U, AP, W);
dfP.toTable();
ampl.setData(dfP);

the setting works for different dimensions of Pr matrix, but when k=1, it generates the following error :

Error using DataFrame/setMatrix (line 182)
Java exception occurred:
java.lang.IllegalArgumentException: Argument is not an array
…
Error in DataFrame/subsref (line 57)
builtin(‘subsref’,obj,s);

Error in scenarios (line 85)
dfP.setMatrix(Pr, U, AP, W);

when on of the dimensions of a 3D matrix is e.g, matrix size is 1x8x4, it is effectively a 2D matrix (here 8x4). So does it not accept the case of where k=1.

Thank you for your help

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2

Hi @Sarah_O,

We have just released amplapi v2.1.4-20230719 with a fix for this bug.

k = 2;
U = num2cell(1:k);
AP = num2cell(1:8);
W = num2cell(1:4);
Pr = randn(k,8,4);
dfP = DataFrame(3, 'U', 'AP', 'W', 'Pr');
dfP.setMatrix(Pr, U, AP, W);
dfP.toTable()
k = 1;
U = num2cell(1:k);
AP = num2cell(1:8);
W = num2cell(1:4);
Pr = randn(k,8,4);
dfP = DataFrame(3, 'U', 'AP', 'W', 'Pr');
dfP.setMatrix(Pr, U, AP, W);
dfP.toTable()

produces the following output:

ans =

  64×4 table

      U       AP        W          Pr     
    _____    _____    _____    ___________

    {[1]}    {[1]}    {[1]}    {[-0.8317]}
    {[1]}    {[1]}    {[2]}    {[-0.0186]}
    {[1]}    {[1]}    {[3]}    {[-0.2378]}
    {[1]}    {[1]}    {[4]}    {[ 0.2641]}
    {[1]}    {[2]}    {[1]}    {[ 0.6121]}
    {[1]}    {[2]}    {[2]}    {[ 0.4553]}
    {[1]}    {[2]}    {[3]}    {[ 0.8962]}

      :        :        :           :     

    {[2]}    {[7]}    {[2]}    {[ 1.2856]}
    {[2]}    {[7]}    {[3]}    {[-0.8116]}
    {[2]}    {[7]}    {[4]}    {[-0.4938]}
    {[2]}    {[8]}    {[1]}    {[ 1.9313]}
    {[2]}    {[8]}    {[2]}    {[-0.2931]}
    {[2]}    {[8]}    {[3]}    {[-0.5167]}
    {[2]}    {[8]}    {[4]}    {[-0.7059]}

	Display all 64 rows.


ans =

  32×4 table

      U       AP        W          Pr     
    _____    _____    _____    ___________

    {[1]}    {[1]}    {[1]}    {[ 0.3450]}
    {[1]}    {[1]}    {[2]}    {[ 0.9601]}
    {[1]}    {[1]}    {[3]}    {[-0.7484]}
    {[1]}    {[1]}    {[4]}    {[-0.1448]}
    {[1]}    {[2]}    {[1]}    {[ 0.2864]}
    {[1]}    {[2]}    {[2]}    {[ 1.7319]}
    {[1]}    {[2]}    {[3]}    {[ 1.1230]}

      :        :        :           :     

    {[1]}    {[7]}    {[2]}    {[ 0.1775]}
    {[1]}    {[7]}    {[3]}    {[-0.1754]}
    {[1]}    {[7]}    {[4]}    {[-0.7639]}
    {[1]}    {[8]}    {[1]}    {[ 0.2461]}
    {[1]}    {[8]}    {[2]}    {[-0.1237]}
    {[1]}    {[8]}    {[3]}    {[ 0.7092]}
    {[1]}    {[8]}    {[4]}    {[-1.1324]}

	Display all 32 rows.
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