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Re: Input cells destroy Grids?


That's perfect, exactly what I wanted - thanks very much!

I would like to know if there's any reason why the Grid was ignored,
though - is it a Mathematica bug or am I combining things incorrectly?


On Feb 2, 10:04 am, A Retey <a... at gmx-topmail.de> wrote:
> Am 01.02.2012 09:51, schrieb Mark Green:
>
> > I'm trying to make a slide which will allow students to insert arbitrary numbers into a matrix multiplication, and have gotten this:
>
> > incel = {1, 2, 3, 4};
> > matrix = {{1, 0, 0, 0}, {0, 1, 0, 0}, {0, 0, 1, 0}, {0, 0, 0, 1}};
> > Style[Grid[{{MatrixForm[incel, TableDirections ->  Row],
> >      ""}, {InputField[MatrixForm[matrix]], MatrixForm[incel.matrix]}}],
> >    FontSize ->  40]
>
> > It looks fine if I remove the InputField call, but with it in there, the input field takes up the entire width of the notebook, ignoring the fact there's supposed to be a grid cell to the right of it. Also, I have a feeling this won't work in FreeCDF because the input is of a matrix, not a number.
>
> > Is there a better way of doing this that inputs only numbers and that fits in a grid?
>
> I think this is doing what you want:
>
> matrix = {{1, 0, 0, 0}, {0, 1, 0, 0}, {0, 0, 1, 0}, {0, 0, 0, 1}};
>
> MatrixForm[
>   Table[With[{i = i, j = j},
>     InputField[Dynamic[matrix[[i, j]]], Number, ImageSize -> 50]], {i,
> 4}, {j, 4}]]
>
> If you want, you can use  Appearance -> None for the InputFields which
> makes the result look like what you had. On the other hand I think that
> it usually is best to avoid overdressed user interface but instead stick
> with conventions for guis so everyone will understand at first glance
> how they work...
>
> hth,
>
> albert




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