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copied!<p><strong>Update2</strong></p> <p>Actually a real reproducible example is now, thanks to code and data being provided:</p> <pre><code>d1 <- read.csv(url("http://misterdavis.org/r_wiki/r_results_1231_2010")) lpp_axis1 <- with(d1, data.frame("Compile Source Code" = Q3A.1, "View Source Code" = Q3A.2, "Change Source Code" = Q3A.3, "Write Documentation" = Q3A.8, "File Bug Reports"= Q3B.3, "Ask Questions" = Q3B.5, "Provide Answers" = Q3B.6, "Overall Participation" = Q3a3bConsolidated)) lpp_axis2 <- with(d1, data.frame("Identification" = Q1, "Overall Learning" = Q6Consolidated, "Learning Programming" = Q6.1, "Learning about Computers" = Q6.2, "Learning Teamwork" = Q6.3)) corrplot(cor(lpp_axis1, lpp_axis2), method=c("number"), bg = "grey10", addgrid.col = "gray50", tl.cex=1, tl.col = "black", col = colorRampPalette(c("yellow","green","navyblue"))(100)) dev.new() corrplot(cor(lpp_axis1, lpp_axis2), method=c("number"), bg = "grey10", addgrid.col = "gray50", tl.cex=2, tl.col = "black", col = colorRampPalette(c("yellow","green","navyblue"))(100)) </code></pre> <p>The <code>dev.new()</code> allows you to have both on screen at once to compare, without splitting the plotting region into two panels.</p> <p>The <code>tl.offset</code> seems to cause more problems than it is worth, so I have left it out. I include the two figures below:</p> <p>With <code>tl.cex = 1</code></p> <p><img src="https://i.stack.imgur.com/II6b0.png" alt="corrplot with tl.cex = 1"></p> <p>With <code>tl.cex = 2</code></p> <p><img src="https://i.stack.imgur.com/hA1Xk.png" alt="corrplot with tl.cex = 2"></p> <p>As you can see, I can't reproduce the problem you are seeing; <code>tl.cex</code> is only changing the size of the size of the axis labels. Note this is without using <code>tl.offset</code> but the rest of the plotting code is the same as yours.</p> <p>This is what I get from <code>packageDescription()</code>:</p> <pre><code>R> packageDescription("corrplot") Package: corrplot Type: Package Title: visualization of a correlation matrix Version: 0.30 Date: 2010-05-30 Author: Taiyun Wei Suggests: seriation, cairoDevice, Cairo, Maintainer: Taiyun Wei <weitaiyun@gmail.com> Description: The corrplot package is a graphical display of a correlation matrix, confidence interval. It also contains some algorithms to do matrix reordering. License: GPL-2 | GPL-3 LazyLoad: yes URL: http://corrplot.r-forge.r-project.org Repository: CRAN Repository/R-Forge/Project: corrplot Repository/R-Forge/Revision: 45 Date/Publication: 2010-05-31 07:44:14 Packaged: 2010-05-30 20:39:16 UTC; rforge Built: R 2.13.0; ; 2011-04-01 12:33:21 UTC; unix </code></pre> <p>-- File: /home/gavin/R/libs/corrplot/Meta/package.rds</p> <p>Compare it with the one on your system and try the example above so we are running exactly the same code for comparison.</p> <hr> <p><strong>Original Example</strong> Here is a reproducible example:</p> <pre><code>require(corrplot) data(mtcars) corr <- cor(mtcars) corrplot(corr, method = "number", tl.cex = 2) </code></pre> <p><strong>Update</strong></p> <p>Ok, I see the problem now. With <code>tl.offset</code>, you push the labels away from the correlation graphic further out into the margins. This seems either a bug on infelicity in <code>corrplot()</code> as if you don't set <code>tl.offset</code> it scales the correlation graphic to accommodate the labels. The only solution I can see is to not set <code>tl.offset</code> at all, or set it to a smaller value Here is an extreme example:</p> <pre><code>layout(matrix(1:2, ncol = 2)) corrplot(corr, method = "number", tl.cex = 2, tl.offset = 3) corrplot(corr, method = "number", tl.cex = 2) layout(1) </code></pre> <p><img src="https://i.stack.imgur.com/Ll9to.png" alt="corrplot 4"></p> <p>You <em>can</em> improve things, by altering the relative dimensions of the plot device - if on screen, increase the width or height (or both) of the plot device window until all the labels are visible. If this is another device (<code>pdf()</code> or <code>png()</code> say), then you'll need to alter the dimensions of the device when you create it.</p> <hr> <p><strong>Original</strong> Which [The reproducible example] gives:</p> <p><img src="https://i.stack.imgur.com/PvuHn.png" alt="mtcars correlation plot"></p> <p>You aren't clear what the problem with the x and y axis labels, but <code>corrplot()</code> alters the plot margins to accommodate the labels. You have already stated the relative size of these x and y axis labels by setting argument <code>tl.cex = 2</code>. If you want the labels bigger, increase this value:</p> <pre><code>corrplot(corr, method = "number", tl.cex = 4) </code></pre> <p><img src="https://i.stack.imgur.com/tlqvx.png" alt="mtcars correlation plot 2"></p> <p>and if you want smaller labels, set <code>tl.cex</code> to a smaller value:</p> <pre><code>corrplot(corr, method = "number", tl.cex = 0.8) </code></pre> <p><img src="https://i.stack.imgur.com/Wy4Xy.png" alt="mtcars correlation plot 3"></p> <p>Given these are the only x <strong>and</strong> y labels on the plot, does this help? If not, <strong>which</strong> labels need altering?</p>

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