make my bar graphs have manually selected colors about radiant

[vnijs]

Do you mean something like the following?

visualize(dataset = "diamonds", xvar = "cut", yvar = "price", type = "bar", custom = TRUE) + 
geom_bar(stat="identity", colour="red", fill = "orange") 

In ggplot2, a bar-chart uses fill to specify a specific variable to plot/color by. For example:

visualize(dataset = "diamonds", xvar = "cut", yvar = "price", type = "bar", fill = "clarity", custom = FALSE)

Winston's cookbook has some nice examples:

http://www.cookbook-r.com/Graphs/Colors_(ggplot2)/

[subhashjaini]

Ooops, I was dealing with a histogram,

[vnijs]

You can add pretty much anything to a plot generated using visualize that you want. However, I'm not sure if it is possible to edit a geom that has already been specified in ggplot2. I'll have to think about that a bit more. One issue is that color is also a parameter for line and scatter plots that has a different meaning than you are looking for. Anyway, you are not restricted to using only the functions exported by radiant. You can still fall back on regular ggplot commands. For example:

ggplot(r_data[["W"]], aes(x = NumberOfPeople)) + 
geom_histogram(fill = "blue")