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POscale_colour_manual R ggplot2 geom_tile() missing something?
 

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  1. POscale_colour_manual R ggplot2 geom_tile() missing something?
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    <p>G'day Everyone,</p> <p>I am having a trouble figuring out how to specify the 'fill' colours for my graphs (below).</p> <p>The different subsets of my data have different levels when I specify my 'fill' variable, e.g. one subset has 2 levels, and the other two have three levels. When I tell my plot to use the variable to 'fill' my graphs colours I get different colours between my graphs. I have tried to specify which colours my 'fill' variable levels should use but it hasn't worked. I have tried using multiple rearrangements of scale_colour_manual(), and a few other things I found around SO, but haven't been able to figure it out.</p> <p>Could someone please point out where I am going wrong, when trying to specify my colours. Below is a representation of the code I am using and an image of my problem. </p> <pre><code># Code to post on Stack overflow to see where I am going wrong with scale_colour_manual() data &lt;- data.frame('id' = c('a', 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c', 'a', 'b', 'c'), 'treatment' = c('1', '1', '1','1', '1', '1','1', '1', '1', '2', '2', '2','2', '2', '2','2', '2', '2', '3', '3', '3', '3', '3', '3', '3', '3', '3'), 'loci' = c('1', '1', '1', '2', '2', '2', '3', '3', '3', '1', '1', '1', '2', '2', '2', '3', '3', '3', '1', '1', '1', '2', '2', '2', '3', '3', '3'), 'assign' = c('0', '0', '0', '1', '2', '1', '1', '1', '1', '0', '0', '0', '1', '2', '1', '1', '1', '2', '0', '0', '0', '1', '2', '2', '1', '1', '1')) a &lt;- data[which(data$id == 'a'),] b &lt;- data[which(data$id == 'b'),] c &lt;- data[which(data$id == 'c'),] aheat &lt;- ggplot(a, aes(as.factor(loci), as.factor(treatment), fill = factor(assign))) + geom_tile(colour = 'white') + scale_x_discrete(expand = c(0,0)) + scale_y_discrete(expand = c(0,0)) + xlab("Number of Loci") + ylab("Treatment") + ggtitle("A Plot") + theme(axis.ticks = element_blank(), axis.text.x = element_text(angle = 320, size = 6, vjust = 0.5), axis.text.y = element_text(size = 8)) + scale_colour_manual(breaks = a$assign, values = c('0' = 'blue', '1' = 'green')) aheat bheat &lt;- ggplot(b, aes(as.factor(loci), as.factor(treatment), fill = factor(assign))) + geom_tile(colour = 'white') + scale_x_discrete(expand = c(0,0)) + scale_y_discrete(expand = c(0,0)) + xlab("Number of Loci") + ylab("Treatment") + ggtitle("B Plot") + theme(axis.ticks = element_blank(), axis.text.x = element_text(angle = 320, size = 6, vjust = 0.5), axis.text.y = element_text(size = 8)) + scale_colour_manual(breaks = b$assign, values = c('0' = 'blue', '1' = 'green', '2' = 'red')) bheat cheat &lt;- ggplot(c, aes(as.factor(loci), as.factor(treatment), fill = factor(assign))) + geom_tile(colour = 'white') + scale_x_discrete(expand = c(0,0)) + scale_y_discrete(expand = c(0,0)) + xlab("Number of Loci") + ylab("Treatment") + ggtitle("C Plot") + theme(axis.ticks = element_blank(), axis.text.x = element_text(angle = 320, size = 6, vjust = 0.5), axis.text.y = element_text(size = 8)) + scale_colour_manual(breaks = c$assign, values = c('0' = 'blue', '1' = 'green', '2' = 'red')) cheat </code></pre> <p><img src="https://i.stack.imgur.com/TITxC.png" alt="enter image description here"></p> <p>Thanks for all the help!</p> <p>Regards, Adam</p>
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    1. COAs you are setting fill= then use scale_fill_manual() to set colors, not the scale_color_manual().
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      1. POscale_colour_manual R ggplot2 geom_tile() missing something?
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    2. COThanks Didzis. One of those super obvious things that I kept on missing.
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