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POHow do I use ggplot2 to manually assign hexadecimal colors to each data point in a plot or bar graph?
 

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  1. POHow do I use ggplot2 to manually assign hexadecimal colors to each data point in a plot or bar graph?
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    <p>I have a data set, and one of the variables is a factored array with hexadecimal characters (e.g. '#00FF00'). One of the things I wanted to try doing is creating a bar plot with all of the different colors combined.</p> <p>I tried using</p> <p><code>cg&lt;-ggplot(my.data,aes(x=factor(1),fill=as.character(my.color)))</code></p> <p>followed by</p> <p><code>cg+geom_bar()</code></p> <p>but the only colors plotted seem to be ones from the default scale. I've tried omitting the as.character() part of the code, but it doesn't make a difference. I also have the same issue when making 2d plots with geom_point(). </p> <p>If I try something like</p> <p><code>plot(my.data$var1,my.data$var2,col=as.character(my.color))</code></p> <p>the colors are plotted the way I wanted them, although the graph doesn't look as nice as the ones in ggplot2.</p> <p>Is there something obvious I'm missing, or is this beyond the scope of ggplot2?</p>
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