You need to remove out.extra='style="display:block; margin: auto"'. In CSS, display:block; means this element stands in its own line, and no other elements can sit by its side. This is applied to individual images, so the two images will not be arranged side by side.
But you will lose the center alignment without display:block. The difficulty comes from the fact that Markdown images are not put into div containers as in HTML. Regards, Yihui -- Yihui Xie <xieyi...@gmail.com> Phone: 206-667-4385 Web: http://yihui.name Fred Hutchinson Cancer Research Center, Seattle On Wed, Jun 19, 2013 at 6:23 AM, Michael Friendly <frien...@yorku.ca> wrote: > I've read all the docs on knitr and some blogs on this topic, but can't > figure out how > to produce side-by-side figures in R markdown, except by composing a single > figure > in R with par(mfrow=c(1,2)). > I know this can be done easily with the LaTeX engine, but why not with HTML > output? > > A small test file is below. If I were composing HTML directly, I would just > wrap the images > in a table, e.g., > > <table> > <tr><td><img src="fig1.png"></td> > <td><img src="fig2.png"></td> > </tr> > </table> > > Is there someway to achieve this with knitr, perhaps a chunk hook? > > --- test-figs.Rmd ----- > Testing side-by-side figs > ========================== > > ```{r knitr-setup, include=FALSE} > library(knitr) > library(vcd) > opts_chunk$set(out.extra='style="display:block; margin: auto"', > fig.align="center", fig.width=4, fig.height=4) > opts_knit$set(progress = FALSE, verbose = TRUE) > ``` > > This doesn't do what I want: > ```{r chunck1, fig.show='hold'} > plot(1:10) > plot(10:1) > ``` > > This does: > ```{r chunck2, fig.show='hold', fig.width=8} > op <- par(mfrow=c(1,2)) > plot(1:10) > plot(10:1) > par(op) > ``` > > What to do with grid-based graphics (requires messing with viewports): > > ```{r chunck3, fig.width=6} > data(Titanic, package="datasets") > mosaic(Titanic) > mosaic(Titanic, shade=TRUE) > ``` > > -- > Michael Friendly Email: friendly AT yorku DOT ca > Professor, Psychology Dept. & Chair, Quantitative Methods > York University Voice: 416 736-2100 x66249 Fax: 416 736-5814 > 4700 Keele Street Web: http://www.datavis.ca > Toronto, ONT M3J 1P3 CANADA > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
