Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>You can extract the number of facets of your plot with the following function. I have tried to be as general as possible and it should be applicable for both <code>facet_grid</code> and <code>facet_wrap</code> faceting. It is however possible that I have overlooked some possibilities. If so, please leave a comment. </p> <pre><code>nfacetcols &lt;- function(p) { if (is.null(p$facet$cols) &amp; is.null(p$facet$facets)) return(1) # facet_grid - version if (! is.null(p$facet$cols)) { if (length(p$facet$cols)==0) return(1) dat &lt;- p$data[,as.character(p$facet$cols)] if (is.factor(dat)) return(nlevels(dat)) if (is.data.frame(dat)) return(nrow(unique(dat))) if (is.numeric(dat)) return(length(unique(dat))) } # facet_wrap - version if (! is.null(p$facet$facets)){ if (!is.null(p$facet$ncol)) return(p$facet$ncol) dat &lt;- p$data[,as.character(p$facet$facets)] tot &lt;- ifelse(is.factor(dat), nlevels(dat), nrow(unique(dat))) if (!is.null(p$facet$nrow)) return(ceiling(tot/p$facet$nrow)) return(ceiling(sqrt(tot))) } } </code></pre> <p>With this function, you can extract the number of columns. The number of levels of your <code>x</code>-factor can easily be extracted using </p> <pre><code>xlvls &lt;- nlevels(p$data[,p$labels$x]) </code></pre> <p>Then using the suggestion of @agstudy, you can use the following code to <code>ggsave</code> your plot: </p> <pre><code># create data set set.seed(123) N &lt;- 20 df &lt;- data.frame(a = sample(LETTERS[1:10], N, replace=TRUE), b = sample(letters[1:5], N, replace=TRUE), yax = rnorm(N), xax = factor(sample(letters[16:20], N, replace=TRUE))) # plot p &lt;- ggplot(df, aes(xax, yax)) + geom_point() + facet_grid(b~a) ggsave("eg.plot.png", p + theme(axis.text.x = element_text(angle = 90, hjust = 1)), width=xlvls*nfacetcols(p)/5) </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POHow to programmatically assign a good width to a graph in ggplot2
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USshadow
    1. USshadow
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. COThanks. I don't understand why is this better than just rotating the labels?
      singulars
      1. PO
      1. USNikola Knezevic
    2. COIt isn't better. But your question stated "I don't know in advance how big the graph is going to be (number of facets and breaks)." This is just a way to find out. Perhaps that is also useful for other purposes than the saving, so I thought I would share...
      singulars
      1. PO
      1. USshadow
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload