I am attempting to create a map in which each US state is colored according
to a character type categorical variable. I am able to get the map to
render, but all of the tooltips show a numeric value instead of the
character string in my variable. Here's a reproducible example:
library(googleVis)
library(datasets)
category <- c("A","B","C","D","E",
"A","B","C","D","E",
"A","B","C","D","E",
"A","B","C","D","E",
"A","B","C","D","E",
"A","B","C","D","E",
"A","B","C","D","E",
"A","B","C","D","E",
"A","B","C","D","E",
"A","B","C","D","E")
hover <- c(1:50)
data <- data.frame(state.name,category,hover)
Map <- gvisGeoMap(data, "state.name", "category", "hover",
options=list(region="US",
displayMode="regions",
resolution="provinces",
width=600, height=400))
plot(Map)
The map assigns colors correctly for "category," but the tooltip shows
category as a number, rather than a letter A - E. Ultimately, I would like
to be able to assign discrete colors to each category, rather than using a
gradient, but I'll take one step at a time with my questions. The end goal
is to use this map in a Shiny app. Any help is much appreciated.
P.S. I've tried gvisGeoChart with essentially the same result. Simply
assigning hover = category doesn't work in my situation; in the final
product, I will be displaying a separate hover variable in the tool tip.
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