Saving a correlation matrix graphic as PDF

Question

I have an correlation matrix object I created with corrplot

p1 <- corrplot(correlations_history, method = "number", type = "lower", title = "Regional Factor Correlation Matrix over history", mar = c(0,0,1,0), number.cex = 0.5, number.digits = 2)

I'm trying to save it as a pdf. For some reason I can't figure out how to do that. Any help appreciated. Thank you!

Answer 1

Start the pdf graphics driver then call your plot.

pdf(file = "yourfilename.pdf")

corrplot(correlations_history, method = "number", type = "lower", 
title = "Regional Factor Correlation Matrix over history", 
mar = c(0,0,1,0), number.cex = 0.5, number.digits = 2)

dev.off()

Answer 2

Although it is an old question, I thought of providing an alternate approach using recordPlot(), replayPlot() and ggsave().

p1 <- { # Prepare the Corrplot 
       corrplot(correlations_history, 
                method = "number", 
                type = "lower", 
                title = "Regional Factor Correlation Matrix over history", 
                mar = c(0,0,1,0), 
                number.cex = 0.5, 
                number.digits = 2);
        # Call the recordPlot() function to record the plot
        recordPlot()
       }

# In case if you want to save the image using ggsave
# replayPlot basically prints the plot.
library(ggplot2)
ggsave(filename = "p1.pdf", plot = replayPlot(p1))