CODEWITHSUNDEEP
matrixoctavesymbolic-math
Rustam Mamin
Rustam Mamin

Reputation: 31

Defining symbolic matrix in Octave

When I execute the following code

pkg load symbolic
syms a 
A = [1,1,1,2;-1,0,-1,-1; -1,0,-2,-3; 1, 0, 1 ,a];

I receive the following error:

ex12_1 error: octave_base_value::map_value(): wrong type argument 'scalar' error: called from ex12_1 at line 6 column 3

Upvotes: 1

Views: 5500

Answers (1)

Sardar Usama
Sardar Usama

Reputation: 19689

This is a known bug. See bug#45423 and bug#42152.

The workaround is also suggested in the bug report which is to enclose each row in a square bracket. i.e.

A = [[ 1, 1,  1,  2]; 
     [-1, 0, -1, -1]; 
     [-1, 0, -2, -3]; 
     [ 1, 0,  1,  a]];

I have tested it to work on Octave v4.2.1, OctSymPy v2.6.0.

Upvotes: 4

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