heatmap with values (ggplot2)

by

This has been updated to conform to tidyverse principles and improve poor use of ggplot2

Per SlowLeraner’s comment I was easily able to do this:

library(tidyverse)

## make data
dat <- matrix(rnorm(100, 3, 1), ncol=10)

## reshape data (tidy/tall form)
dat2 <- dat %>%
    tbl_df() %>%
    rownames_to_column('Var1') %>%
    gather(Var2, value, -Var1) %>%
    mutate(
        Var1 = factor(Var1, levels=1:10),
        Var2 = factor(gsub("V", "", Var2), levels=1:10)
    )

## plot data
ggplot(dat2, aes(Var1, Var2)) +
    geom_tile(aes(fill = value)) + 
    geom_text(aes(label = round(value, 1))) +
    scale_fill_gradient(low = "white", high = "red")

enter image description here

More Related Contents:

  1. Several questions on ggplot2 [closed]
  2. Multirow axis labels with nested grouping variables
  3. How to change legend title in ggplot
  4. Consistent width for geom_bar in the event of missing data
  5. Grouped bar plot in ggplot
  6. Create discrete color bar with varying interval widths and no spacing between legend levels
  7. Overlaying histograms with ggplot2 in R
  8. ggplot2 0.9.0 automatically dropping unused factor levels from plot legend?
  9. Merge and Perfectly Align Histogram and Boxplot using ggplot2
  10. Grouped barplot in R with error bars
  11. Plotting multiple time-series in ggplot
  12. How do I change the color value of just one value in ggplot2’s scale_fill_brewer?
  13. stacked bars within grouped bar chart
  14. how to jitter/dodge geom_segments so they remain parallel?
  15. How to jitter both geom_line and geom_point by the same magnitude?
  16. How to show only part of the plot area of polar ggplot with facet?
  17. Different legend-keys inside same legend in ggplot2
  18. Plot two graphs in a same plot
  19. How to make variable bar widths in ggplot2 not overlap or gap
  20. ggplot multiple grouping bar
  21. Apply a ggplot-function per group with dplyr and set title per group
  22. How to use empty space produced by facet_wrap?
  23. pie chart with ggplot2 with specific order and percentage annotations
  24. R stat_smooth all points
  25. Drawing a barchart to compare two sets of data using ggplot2 package?
  26. Plotting multiple graphs in R [closed]
  27. How to set legend alpha with ggplot2
  28. Changing format of some axis labels in ggplot2 according to condition [duplicate]
  29. ggplot2 – using two different color scales for overlayed plots
  30. heatmap-like plot, but for categorical variables

Leave a Comment