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POHow to recycle colours in a colorbrewer palette using line symbols
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15112440
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2013-02-27T12:42:46.040
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2013-02-27T13:38:01.497
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2017-05-23T12:34:30.953
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I'm using ggplot2 to create quite a few <code>facet_wrap</code>ped <code>geom_line</code> plot. Although each plot only has a maximum of eight lines, when taken together, there are more like twenty categories to show on the legend. In a similar vein to this: <a href="https://stackoverflow.com/questions/13616515/recommend-a-scale-colour-for-13-or-more-categories">Recommend a scale colour for 13 or more categories</a> and this: <a href="https://stackoverflow.com/questions/6075140/in-r-how-do-i-change-the-color-value-of-just-one-value-in-ggplot2s-scale-fill-b/6076605#6076605">In R,how do I change the color value of just one value in ggplot2's scale_fill_brewer?</a> I'd like to artificially up the number of colours I can show using colorbrewer's high-contrast colour sets. An obvious way to do this would seem to be to 'recycle' the colours in the palette, with a different line symbol each time. So bright red with 'x's on the line could be a different category than bright red with 'o's etc. Can anyone think how I might do this? Thanks! <h2>Edit</h2> Here's some (sanitised) data to play with, and the R code I'm using to produce my plot. Data: <a href="http://orca.casa.ucl.ac.uk/~rob/Stack%20Overflow%20question/stack%20overflow%20colours%20question%20data.csv" rel="nofollow noreferrer">http://orca.casa.ucl.ac.uk/~rob/Stack%20Overflow%20question/stack%20overflow%20colours%20question%20data.csv</a> R code: <pre><code>csvData <- read.csv("stack overflow colours question data.csv") p <- ggplot(csvData, aes(year, percentage_of_output, colour=category, group=category)) p + geom_line(size=1.2) + labs(title = "Can I recycle the palette colours?", y = "% of output") + scale_colour_brewer(palette = "Set1") + theme(plot.title = element_text(size = rel(1.5))) + facet_wrap("country_iso3", scales="free_y") </code></pre>
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<r><ggplot2><colorbrewer>
Title
How to recycle colours in a colorbrewer palette using line symbols
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