add additional limitation

AliciaSchep · Sep 5, 2018 · 8bc57bc · 8bc57bc
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diff --git a/README-plot_plot-1.png b/README-plot_plot-1.png
diff --git a/README.Rmd b/README.Rmd
@@ -105,3 +105,4 @@ gglabeller(p, aes(label = rownames(mtcars)),  fontface = "bold", color = "red")
 
 Requires points to label; not targetted at line plots or other non-point plots.
 
+Relies on shiny's nearPoints and brushedPoints functions, which require that the 'x' and 'y' aesthetics be mapped to a column name and not a transformation. For example, `ggplot(mtcars, aes(x = log(wt), y = mpg)) + geom_point()` will not work because the x aesthetic is mapped to a transformation of the column. For such a plot, one could modify the input first to create a column with the log of the value. 
diff --git a/README.md b/README.md
@@ -112,3 +112,10 @@ gglabeller(p, aes(label = rownames(mtcars)),  fontface = "bold", color = "red")
 
 Requires points to label; not targetted at line plots or other non-point
 plots.
+
+Relies on shiny’s nearPoints and brushedPoints functions, which require
+that the ‘x’ and ‘y’ aesthetics be mapped to a column name and not a
+transformation. For example, `ggplot(mtcars, aes(x = log(wt), y = mpg))
++ geom_point()` will not work because the x aesthetic is mapped to a
+transformation of the column. For such a plot, one could modify the
+input first to create a column with the log of the value.