[R] pheatmap breaks

[Adrian Johnson]

Hi group:
I tried multiple times cannot understand the breaks to work for my heatmap.

I am using following way:

pheatmap(chxx,

cluster_cols=FALSE,
annotation_col=annotcols,
annotation_colors=anno_colors,
col=colorRampPalette(c("dark blue", "white", "#ff0000"))(34),
show_colnames=F)


> max(chxx)
[1] 4.421862
> min(chxx)
[1] -3.324021


I want to plot anything above 1.96 as red,  anything below -1.96 as blue
1.195  as pink and 0 - 0.99 as gradient of white pink.

similarly, < -1.96 as blue,    values greater than -1.96 less that -1
gets light blue and 0 to -0.99 get white gradient to blue.


there will be 7 breaks

  < - 1.96--- - 1-  -.99---- 0 ------0.99-1---1.96---->1.96

how can I define the breaks.

appreciate your help. Thanks in advance.

Adrian