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R: Which heatmap/image to get row-sorted plot without any dendrogram?

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r

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heatmap

Which package is best for a heatmap/image with sorting on rows only, but don't show any dendrogram or other visual clutter (just a 2D colored grid with automatic named labels on both axes). I don't need fancy clustering beyond basic numeric sorting. The data is a 39x10 table of numerics in the range (0,0.21) which I want to visualize.

I searched SO (see this) and the R sites, and tried a few out. Check out R Graphical Manual to see an excellent searchable list of screenshots and corresponding packages.

The range of packages is confusing - which one is the preferred heatmap (like ggplot2 is for most other plotting)? Here is what I found out so far:

  • base::image - bad, no name labels on axes, no sorting/clustering
  • base::heatmap - options are far less intelligible than the following:
  • pheatmap::pheatmap - fantastic but can't seem to turn off the dendrograms? (any hacks?)
  • ggplot2 people use geom_tile, as Andrie points out
  • gplots::heatmap.2 , ref - seems to be favored by biotech people, but way overkill for my purposes. (no relation to ggplot* or Prof Wickham)
  • plotrix::color2D.matplot also exists

base::heatmap is annoying, even with args heatmap(..., Colv=NA, keep.dendro=FALSE) it still plots the unwanted dendrogram on rows.

For now I'm going with pheatmap(..., cluster_cols=FALSE, cluster_rows=FALSE) and manually presorting my table, like this guy: Order of rows in heatmap?

Addendum: to display the value inside each cell, see: display a matrix, including the values, as a heatmap . I didn't need that but it's nice-to-have.

like image 337
smci Avatar asked May 12 '12 08:05

smci


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How do you sort rows in heatmap in R?

heatmap for a predetermined order of rows. Simply reorder the rows of your second matrix to match the first one, then use for example R's heatmap() function setting Rowv=FALSE to prevent it from automatically reordering the rows, alternatively, you could set Rowv to a vector defining the order.

How do you remove a Dendrogram heatmap?

Heat map dendrogramsSetting it to NA will remove the dendrogram. The Colv argument is the equivalent of Rowv but for columns. Set it to NA to remove the column dendrogram. Setting Rowv and Colv to NA will remove both dendrograms of the heat map and no reordering will be computed.

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1 Answers

With pheatmap you can use options treeheight_row and treeheight_col and set these to 0.

like image 148
Raivo Kolde Avatar answered Oct 04 '22 04:10

Raivo Kolde