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I was trying to use Grid to align different plots, two on the first row, and only one in the second row, so I have something like this (where a,b and c are plots): Grid[{{a, b},{c}}].

The problem is, I would like for the 'c' plot to be aligned directly below the union of 'a' and 'b', and not the default placement right below 'a' leaving nothing below 'b'. How could I do this? I can't seem to find an option for it or another question like mine.

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    $\begingroup$ Try Grid[{{a, b}, {c, SpanFromLeft}}]. Here is the documentation for SpanFromLeft. $\endgroup$ – MarcoB Aug 17 '15 at 3:52
  • $\begingroup$ Thank you MarcoB!! Such a simple thing! $\endgroup$ – Diego Aug 17 '15 at 4:05
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There are a number of ways to do that, or something like that. These are the plots and your Grid function:

a = Plot[Sin[x], {x, 0, 2 \[Pi]}, ImageSize -> 200];
b = Plot[Sin[2 x], {x, 0, 2 \[Pi]}, ImageSize -> 200];
c = Plot[Sin[3 x], {x, 0, 2 \[Pi]}, ImageSize -> 200];
Grid[{{a, b}, {c}}]

It yields the following:

enter image description here

This places the plot c in the middle below a and b:

Column[{Row[{a, b}], c}, Alignment -> Center]

returning the following:

enter image description here

This also returns c in the middle, but there is some extra space between a and b:

Grid[{{a, b}, {Row[{Spacer[300], c}]}}]

enter image description here You can play with the spacing to adjust the position.

And finally, the excellent advice of MarcoB given as a comment.

Have fun!

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