Grid ItemSize is smaller than expected

Question

If I execute MatrixPlot@IdentityMatrix@100, the result is a good size. However, if I evaluate

Grid[{{200!}, {MatrixPlot@IdentityMatrix@100}}, ItemSize -> Automatic]

the MatrixPlot is much smaller, even when the page is wide. How can I make the MatrixPlot appear at its original size in the Grid? I'd prefer not to hard-code the size.

this picture

The picture shows that the second MatrixPlot is too small.

Automatic != Automatic so why not just use ImageSize for MatrixPlot? — Kuba, Oct 25 '13 at 06:19

score 14 · Accepted Answer · answered Oct 25 '13 at 10:46

If you set ImageSizeMultipliers -> 1 then the graphics will not be downsized when appear inside list-like constructs:

Style[
     Grid[{{200!}, {MatrixPlot@IdentityMatrix@100}}, ItemSize -> Automatic],   
     ImageSizeMultipliers -> 1]

Alternatively,

Grid[{{200!}, {MatrixPlot@IdentityMatrix@100}}, ItemSize -> Automatic,
  BaseStyle -> ImageSizeMultipliers -> 1]

or

Grid[{{200!}, {MatrixPlot@IdentityMatrix@100}}, ItemSize -> Automatic,
  ItemStyle -> ImageSizeMultipliers -> 1]

give the same output.

score 5 · Answer 2 · answered Oct 25 '13 at 07:47

Although he puts it somewhat obliquely, Kuba is giving you good advice in his comment. When you place a graphics object into a Grid or Column construct and care even a little about its size, explicitly make the setting of the ImageSize option in the graphics object.

Grid ItemSize is smaller than expected

2 Answers2

Linked