cex equivalent in ggplot2

ggplot2, r

Solution

I think you are tyring to adjust the size of the text itself, not the x-axis, right?

Here's an approach using the `ggplot()` command.

ggplot(data = as.data.frame(state.x77), aes(x = Income, y = Population)) +
    geom_smooth(method = "lm", se = FALSE) +
    geom_text(aes(label = state.abb), size = 2.5)

Problem

In my work, I frequently display scatterplots using text labels. That's meant a `plot()` command, followed by `text()`. I used `cex` to adjust to font size to what I wanted it very quickly. I created a text scatterplot very quickly using `qplot`. But I can't adjust the size fast. Here's a silly code example: ``` data(state) qplot(Income, Population, data=as.data.frame(state.x77), geom=c("smooth", "text"), method="lm", label=state.abb) ``` Whereas in the old days I'd do: ``` plot(xlim=range(Income), ylim=range(Population), data=state.x77, type="n") text(Income, Population, state.abb, data=state.x77, cex=.5) ``` If I wanted the text size halved from what I saw at the defaults (oh, and I'd have to do a linear regression manually and add `abline()` to get the regression line -- nice to do it all in one via ggplot2). I know I can add a size adjustment with size, but it's not a relative size adjustment like I'm used to. Hadley tweeted me to say that size is measured in mm, which isn't fully intuitive to me. Since I often adjust the size of the plot, either in R or in LaTeX, an absolute scale isn't as useful to me. I must be missing something really simple. What is it?

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