Ggplot2: Changing the layout of the legend?

And here is a hack. There may be bugs, though.

And here is a hack. There may be bugs, though: build_legend Align) && theme$legend. Align=="horizontal") # Calculate sizes for keys - mainly for v.

Large points and lines size_mat Call("cbind", plyr::llply(legend_data, "", "size")) if (is. Null(size_mat)) { key_sizes Label, is. Language)) || suppressWarnings(all(!is.Na(sapply(mapping$.

Label, "as. Numeric")))) hpos Label, function(label) { theme_render(theme, "legend. Text", label, hjust = hpos, x = hpos, y = 0.5) }) # align horizontally if(!horiz){ label_width Call("unit.

C", lapply(labels, grobHeight)) label_heights C( hgap, key_width, hgap, label_width, max( unit(1, "grobwidth", title) - key_width - label_width, hgap ) ) widths Size, label_heights, unit(key_sizes, "mm") ), vgap ) heights Size, unit(height, "mm")) key_width Call("unit. C",lapply(1:length(key_width), function(i)unit. C(key_widthi, hgap, label_widthi, hgap))) widths C( hgap, kglg_width, max( unit(0,"lines"), unit.

C(unit(1, "grobwidth", title) - (sum(kglg_width) - hgap)) ) ) widths Size, label_heights, key_heights ), vgap ) heights Layout)) fg Key"), col = 1+(i*4)-3, row = 4) } for(j in seq_along(layers)) { if (!is. Null(legend_dataj)) { legend_geom Labeli, hjust = hpos, x = hpos, y = 0.5 ) if(!horiz){ fg Position="bottom") p2.

That works exactly how I would expect it to. Thank you! – Brandon Bertelsen Oct 3 '10 at 17:45 Great hack!

– Richie Cotton Oct 8 '10 at 17:33 you, sir, are a gentleman and a scholar. Thank you for this. – fabians Dec 1 '10 at 21:35 Great fix--you obviously know your way around ggplot2!

Very generous to share your expertise with the rest of us. – Aaron May 21 at 21:51.

Nowadays you can simply use legend. Direction="horizontal". For instance: qplot(carat, price, data=diamonds, colour=color) + opts(legend.

Position="top", legend. Direction="horizontal").

Most likely due to Koshke's development work over the last few patchs to ggplot2! :) Thank's for pointing this out, and big thanks to Mr. Takahashi for rolling it into ggplot! – Brandon Bertelsen Jan 17 at 20:46 Correction, Dr. Takahashi.

– Brandon Bertelsen Jan 17 at 20:50.

There is something like guide_legends_box with an option "horizontal", but I can't get it to work. > d.

Looking at the function that creates the legend. It seems like it's forcing horizontal to be false. – Brandon Bertelsen Oct 1 '10 at 17:01 Did you ask the developers of ggplot2 already?

Indeed, the default value is false, but the problem is the scales object within the plot object, which is empty (try d$scales, it gives basically nothing). – Joris Meys Oct 1 '10 at 21:57.

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