# How can I fix the alignment of complex combinations of GraphicsGrid / GraphicsRow plots?

I am having problems joining multiple plots using GraphicsRow and GraphicsGrid. The issue is that Mathematica (v12.1) rescales arbitrarily my plots when I try to combine them. The issue arises when I try to combine the output of GraphicsGrid with another plot using again GraphicsGrid/GraphicsRow, even if (I believe) I properly take into accout image sizes and paddings.

My goal is the following: After I put six identical plots in grid, I would like to add a seventh plot to the right, which has different dimensions and then export everything to .pdf.

I understand that if I want to preserve the dimensions of the plots with GraphicsGrid/GraphicsRow, I have to correctly specify the aspect ratio and ImageSize of all the plots. I define the image sizes of my plots to be the sum of the frame size and image padding, like in the following code:

data = Table[RandomReal[], {10}]; (* Some data to plot *)

(* Defining relevant dimensions for plot 1*)
framex1 = 100;
framey1 = 100;

plot1 = ListPlot[data, PlotMarkers -> Automatic,
Frame -> True, FrameLabel -> {"foo", "bar"},
AspectRatio -> framey1/framex1, ImageSize -> imagesize1,


This code produces this plot: Then I put six copies of this plot in a grid:

gridplot =
GraphicsGrid[{{plot1, plot1, plot1}, {plot1, plot1, plot1}},
Spacings -> 0, ImageSize -> {3 imagesize1[], 2 imagesize1[]}]


This works fine. In this case gridplot actually shows 6 identical copies of plot1, with the correct size. The result is: Now I consider the additional plot. I am careful to set the vertical size to be equal to the one of gridplot, setting the vertical padding accordingly:

(* Defining relevant dimensions for plot 2*)
framex2 = 100;
framey2 = 150;

paddingy2 = {(2 imagesize1[] - framey2)/
2, (2 imagesize1[] - framey2)/2};

imagesize2 = {framex2 + Total[paddingx2], 2 imagesize1[]}

plot2 = ListPlot[data, PlotMarkers -> Automatic,
Frame -> True, FrameLabel -> {"foo", "bar"},
AspectRatio -> framey2/framex2, ImageSize -> imagesize2,


Now, if I put gridplot and plot2 side-by-side, I see that the dimensions are correct. In particular the list

{gridplot, plot2}


gives: However, If I now use GraphicsRow the plots are different and the image padding is messed up!

plot = GraphicsRow[{gridplot, plot2}, Spacings -> 0,
ImageSize -> {3 imagesize1[] + imagesize2[],
2 imagesize1[]}] What am I getting wrong? I have the feeling it might have to do with ImagePadding passed to GraphicsRow/GraphicsGrid.

One solution would be to rasterize the images before using GraphicsRow/GraphicsGrid, but this would prevent to export the final result in vectorial form.

Any help would be appreciated!

Here is one solution

plot1 = With[{XZ = 100, YZ = 100},
ListPlot[data, Frame -> True, FrameLabel -> {"foo", "bar"},
PlotMarkers -> Automatic, ImageSize -> Automatic -> {XZ, YZ},
plot2 = With[{XZ = 100, YZ = 203},
ListPlot[data, Frame -> True, PlotMarkers -> Automatic,
FrameLabel -> {"foo", "bar"}, ImageSize -> Automatic -> {XZ, YZ},
f = Grid[{{plot1, plot1, plot1}, {plot1, plot1, plot1}},
Spacings -> {-12, -12}];
Grid[{{f, plot2}}, Spacings -> {-7, -12.}, BaselinePosition -> Bottom] you can also do the other way

plot1 = With[{XZ = 100, YZ = 100},
ListPlot[data, Frame -> True, FrameLabel -> {"foo", "bar"},
PlotMarkers -> Automatic, ImageSize -> Automatic -> {XZ, YZ},
plot2 = With[{XZ = 310, YZ = 100},
ListPlot[data, Frame -> True, PlotMarkers -> Automatic,
FrameLabel -> {"foo", "bar"}, ImageSize -> Automatic -> {XZ, YZ}, 