Error in the creation of new tools - elementary operations in the rows of a matrix
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Dear, I would like to create tools that perform elementary operations on the rows of a matrix.
For example, if a matrix A is given and the numbers a and b are given, the following command creates the matrix B obtained from A by replacing line a with line b.
B = Sequência(Sequência(Se(i ≟ a, Elemento(Elemento(A, b), j), Se(i ≟ b, Elemento(Elemento(A, a), j), Elemento(Elemento(A, i), j))), j, 1, Elemento(Dimensão(A), 2)), i, 1, Elemento(Dimensão(A), 1))
I would like to set up a new tool in GeoGebra, with
initial objects: A, a, b
final object: B
Although the command works perfectly, an error message appears when I try to create this new tool. Could you help me?
Thank you very much in advance.
Files:
troca_linha.ggb
The same question 
Is this OK?
The input objects of a tool must be free when the tool is defined
see attached
really you need a custom tool for this?
Thanks mathmagic !!
attached: a somewhat simplified command for m2
I appreciate the help.
I understood where my error was and I managed to resolve it.
Now I created three tools:
TrocaLinha = exchange the position of two rows of a matrix.
MultiplicaLinha = multiplies a row by a scalar.
SomaLinha = adds to a row a scalar multiple of another row.
Thank you again
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