I need to make an InputField Grid change the values of a matrix variable without creating a ton of dummy variables. Minimal example follows as the actual matrix is much larger. This will be used in a UI.
m = {{1, 2}, {3, 4}};
However, the InputFields are not linked to the values of m when referenced with Indexed. The Grid that is produced has empty InputFields even though m has values.
Grid@
Table[InputField[Dynamic[Indexed[m, {r, c}]], Number, FieldSize -> Tiny],
Evaluate[Sequence @@ Transpose[{{r, c}, Dimensions[m]}]]]
When entering values into the InputFields they simply disappear and have no effect on m. m stays with its original values.
Dynamic@m
I next tried to Part instead of Indexed which led to errors and still the values that are entered disappear.
Grid@
Table[InputField[Dynamic[m[[r, c]]], Number, FieldSize -> Tiny],
Evaluate[Sequence @@ Transpose[{{r, c}, Dimensions[m]}]]]
How do I create an InputField Grid linked to a matrix variable? Other control combinations are welcome. The objective is a GUI to edit the matrix such that the edited matrix can be extracted and used.
With. That has something to do with the hold attributes of bothTableandDynamicinteracting, correct? – Edmund Mar 03 '17 at 00:55