Add plot alt-text

[ndporter]

How could the content be improved?

Add alt-text to all R plots throughout lesson. Use the fig.alt attribute in markdown blocks like in lines 64-67 of /episodes/08-plot-ggplot2.Rmd. This step is necessary for compliance with WCAG accessibility standards and required for use of lessons in US federal, state, and local government organizations.

{r blank-ggplot, message=FALSE, fig.alt="Blank plot, before adding any mapping aesthetics to ggplot()."} library("ggplot2") ggplot(data = gapminder)

I have not checked all figures. Some (like above) have alt text. Others, like the next one in that episode, do not. Here is some advice on writing alt-text for figures.

[cgross95]

Hi @ndporter, thanks for bringing this to our attention and for providing the technical steps to resolve it.

This is very important and should be resolved ASAP.