adding correlation test results to ggplot

Question

I'm trying to create a ggplot and add results of a correlation test I have done. Something along the lines of:

p+annotate("text",x=12.5,y=15.25,label=c(cor.test$estimate,cor.test$p.value))

I keep getting error messages no matter what I try. Any ideas?

Not a solution to your issue, but have you seen the packages corrplot/ggcorr — Vlo, Feb 16 '18 at 16:26
What are your errors exactly? If you show us some more code (example data and full plotting function), maybe someone finds a solution. — Linus, Feb 16 '18 at 16:30
I have, though I already have a plot and just need to add annotations. Would like to link them to a corr test results directly — B.Shermeister, Feb 16 '18 at 16:33
Related: [Adding Regression Line Equation and R2 on graph](https://stackoverflow.com/questions/7549694/adding-regression-line-equation-and-r2-on-graph) — Henrik, Feb 16 '18 at 16:47

score 16 · Accepted Answer · answered Feb 09 '19 at 08:01

16

I have actually managed to add stat details to the plot by using stat_cor() from the package ggpubr

library(ggpubr)
p+stat_cor(method="pearson")

answered Feb 09 '19 at 08:01

B.Shermeister

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score 4 · Answer 2 · edited Jun 20 '20 at 09:12

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There is a package in development that can do this for you (ggstatsplot is on CRAN).

Here is an example of how to create correlation plot:

    ggstatsplot::ggscatterstats(data = iris, x = Sepal.Length, y = Sepal.Width)

This will produce a plot that looks like the following (you can similarly get results from Spearman's rho (type = 'spearman') or robust correlation test (type = 'robust')):

Check out the documentation of the function for more.

edited Jun 20 '20 at 09:12

Community

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answered Feb 16 '18 at 16:37

Indrajeet Patil

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@B.Shermeister Has this question been answered to your liking? If yes, please accept the answer (stackoverflow.com/help/someone-answers) so that this thread will be closed. – Indrajeet Patil Feb 17 '18 at 22:11
I am trying to create a `ggplot` that will show the result of a ttest (or corr test) on the plot. I am now using the line `annotate("text",x=1,y=10,label='atop(bold("P-value = 0.286"))',cex=7,parse=TRUE)`. The only problem is that I have to change the value manually each time. I would like to insert `ttest$p.value` instead of the number in the label – B.Shermeister May 03 '18 at 18:35

adding correlation test results to ggplot

2 Answers2