Put many heatmap images in one single slide

Question

I have 3 heatmap plots generated using CRAN package heatmap. I want to put these three images in one slide then I used the following command

cowplot::plot_grid(mfs, mfs_ma, mfs_fe,ncol= 3, labels=LETTERS[1:3])

but it return me

Warning messages: In as_grob.default(plot) :Cannot convert object of class pheatmap into a grob

Therefore,how I can put these three images in one slide.

well, I did that already but didn't put them in one slide. It just plots each one by one — adR, Jun 26 '20 at 09:35
Can you provide link to the package, and your code to create mfs, mfs_ma, mfs_fe objects — zx8754, Jun 26 '20 at 10:03

Marco Sandri · Accepted Answer · 2020-06-27T21:33:04.560

Your heatmaps mfs, mfs_ma, mfs_fe are pheatmap objects.
Consider the following simple example:

library(pheatmap)
test <- matrix(rnorm(200), 20, 10)
mfs <- mfs_ma <- mfs_fe <- pheatmap(test)

You can arrange the 3 heatmaps into a single plot using:

cowplot::plot_grid(mfs$gtable, mfs_ma$gtable, mfs_fe$gtable,
                   ncol= 3, labels=LETTERS[1:3])

or

gridExtra::grid.arrange(grobs=list(mfs$gtable, mfs_ma$gtable, mfs_fe$gtable), 
                        ncol= 3, labels=LETTERS[1:3])

1 Answers1