# Why is my plot so small?

This code

e12 = {10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82, 100};
l12 = Log[e12];
l12m = Log[e12 0.9];
l12p = Log[e12 1.1];
LogLinearPlot[{}, {r, 10, 100}, Axes -> {True, False}, Ticks -> {e12},
PlotRange -> {0, 80},
Epilog ->  {{Table[{Dashed, Line[{{l12[[r1]], 0}, {l12[[r1]], 100}}]}, {r1, 1, 13}]},
{Table[{Line[{{l12m[[r1]], 5 + 5 r1}, {l12p[[r1]], 5 + 5 r1}}]}, {r1, 1, 13}]},
{Table[{Blue, Line[{{l12m[[r1]], 2}, {l12p[[r1]], 2}}]}, {r1, 1, 13}]},
{Table[{Line[{{l12m[[r1]], 3.75 + 5 r1}, {l12m[[r1]], 6.25 + 5 r1}}]}, {r1, 1, 13}]},
{Table[{Line[{{l12p[[r1]], 3.75 + 5 r1}, {l12p[[r1]], 6.25 + 5 r1}}]}, {r1, 1, 13}]}
}]


gives me this plot:

Any idea why it's so small?

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In version 7 I get no errors and a plot of normal dimension. What version are you using? Presumably your empty-body usage wasn't designed for. Try plotting something but styling it white or transparent. – Mr.Wizard Dec 23 '13 at 10:22
@Mr.Wizard - I'm using version 9. I'm not sure I understand what you mean by "try plotting something...". – Geert Goeteyn Dec 23 '13 at 10:27
In version 9 I have no problem either. To increase the size of the plot you can add the option "ImageSize". – Kardashev3 Dec 23 '13 at 10:28
I meant that you are not plotting anything in the body of LogLinearPlot; you are only using it ancillary fashion get logarithmic scaling. Possibly using e.g. LogLinearPlot[10, {r, 10, 100}, PlotStyle -> Transparent, . . . will help. Since I don't have the problem I can't test it, and since Kardashev3 also does not have the problem this might have to do with your local configuration. – Mr.Wizard Dec 23 '13 at 10:45
I get an error: "ListQ::argx: ListQ called with 0 arguments; 1 argument is expected. >>" (version 9.0.1 on MacOS X 10.90 – cormullion Dec 23 '13 at 15:47

Use Sequence @@ {} and not {} and the size of the image can be controlled using ImageSize. Also look at ImageMargins and ImagePadding for more control of layout

e12 = {10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82, 100};
l12 = Log[e12];
l12m = Log[e12 0.9];
l12p = Log[e12 1.1];
LogLinearPlot[Sequence @@ {}, {r, 10, 100}, Axes -> {True, False},
Ticks -> {e12}, PlotRange -> {0, 80},
Epilog -> {{Table[{Dashed,
Line[{{l12[[r1]], 0}, {l12[[r1]], 100}}]}, {r1, 1,
13}]}, {Table[{Line[{{l12m[[r1]], 5 + 5 r1}, {l12p[[r1]],
5 + 5 r1}}]}, {r1, 1, 13}]}, {Table[{Blue,
Line[{{l12m[[r1]], 2}, {l12p[[r1]], 2}}]}, {r1, 1,
13}]}, {Table[{Line[{{l12m[[r1]], 3.75 + 5 r1}, {l12m[[r1]],
6.25 + 5 r1}}]}, {r1, 1,
13}]}, {Table[{Line[{{l12p[[r1]], 3.75 + 5 r1}, {l12p[[r1]],
6.25 + 5 r1}}]}, {r1, 1, 13}]}}, ImageSize -> 500]


-
Let run r like {r, 9, 105} to have all bars fully shown at the margins. – Kardashev3 Dec 23 '13 at 10:31