How to color code cnetplot nodes from enrichrResult data

[hlnicholls]

Thank you for developing this package, it is very useful.

I am trying to plot a cnetplot with a color scale relating to my foldchange values.

Running the example code works as expected:

set.seed(123)
x <- list(A = letters[1:10], B=letters[5:12], C=letters[sample(1:26, 15)])
d <- setNames(rnorm(26), letters)
p2 <- cnetplot(x, foldChange=d) + 
  scale_color_gradient2(name='associated data', low='darkgreen', high='firebrick')

However, my version of x is not a list but an enrichResult. When I try to run that, the code gets an error:

kegg_organism = "hsa"
kegg_enrich <-  enrichKEGG(gene   = d$entrezgene_id,
                           organism     = 'hsa',
                           pvalueCutoff = 0.05,
                           pAdjustMethod = 'BH')

kegg <- setReadable(kegg_enrich, 'org.Hs.eg.db', 'ENTREZID')
kegg_genes <- kegg[,]
keggtop5 <- kegg_genes[order(kegg_genes$p.adjust),]
keggtop5 <- keggtop5[1:5,]
top5all <- enrichDF2enrichResult(keggtop5)
filtered_kegg_genes <- kegg_genes[!grepl("cancer", kegg_genes$Description, ignore.case = TRUE), ]
top5paths <- head(filtered_kegg_genes[order(filtered_kegg_genes$pvalue), ], 5)

top5all <- enrichDF2enrichResult(top5paths, pAdjustMethod='BH')

scores <- setNames(d$Median_PoPS, d$entrezgene_id)

p = cnetplot(top5all, showCategory = 5,
              foldChange=scores,
              scale_color_gradient2(name='associated data', low='steelblue', high='firebrick'))

Error in `layout_to_table()`:
! Unknown `layout`
Run `rlang::last_trace()` to see where the error occurred.

I have also tried:

> p = cnetplot(top5all,showCategory = 5,
+              foldChange=scores)
Scale for size is already present.
Adding another scale for size, which will replace the existing scale.
Warning message:
In cnetplot.enrichResult(x, ...) :
  Use 'color.params = list(foldChange = your_value)' instead of 'foldChange'.
 The foldChange parameter will be removed in the next version.

> 
> p = cnetplot(top5all,showCategory = 5,
+              color.params = list(foldChange = scores)
+              
+ )
Scale for size is already present.
Adding another scale for size, which will replace the existing scale.

These run but do not color code the nodes.

[guidohooiveld]

Your code in the 2nd code box, starting from the line kegg_genes <- kegg[,], looks very complex to me. So what exactly do you want to achieve here? Could you provide a reproducible example?
Also note that (AFAIK) the function enrichDF2enrichResult is not part of clusterProfiler, but rather taken from a GitHub page called multienrichjam (here)?

Yet, this thread may (still) be useful? https://support.bioconductor.org/p/p133748/

[hlnicholls]

Thank you for your reply and for your help. It is taking from multienrichjam. Sorry I should've also mentioned previously that maybe 1-2 years ago I was able to create a cnetplot with color scaling working as I needed for this type of data (I think I used that bioconductor link you sent to set it up with using scale_color_gradientn()). However, I've since reinstalled all the packages on a new computer and now I can't get that old code to work.

Ultimately I just want to color code my genes by their PoPs scores (in my d I have a column of genes and a column of their PoPs scores). I want to see this for my genes that are in the top 5 most enriched pathways.

Here is my full code with example data:

library(data.table)
library(clusterProfiler)
library(tidyverse)
library(multienrichjam)
library(RColorBrewer)
library(ggraph)
library(ggfittext)
library(tidyr)
library(msigdbr)
library(org.Hs.eg.db)
library(biomaRt)

d <- structure(list(Gene = c("ACOT7", "ACTA2", "ACTN2", "ACTN4", "ADCY6", 
"ADO", "ADPRHL1", "AFF4", "AGO2", "AHCY", "ALG10", "ALPK3", "AMOTL2", 
"ANAPC7", "ANKS1A", "ANXA4", "ARFGAP2", "ARHGAP27", "ARIH2", 
"ARMC9", "ARPC3", "ASIP", "ATP1B2", "ATP2B1", "ATXN2", "B3GNT7", 
"BAG3", "BAIAP3", "BANK1", "BCAS3", "BHLHE41", "BMP7", "BMPR2", 
"BRD2", "C1QTNF4", "C1orf21", "C1orf35", "C2orf42", "C2orf69", 
"C3orf18", "CACFD1", "CACNB2", "CACNB3", "CALCB", "CALU", "CAMK2D", 
"CAMK2G", "CASQ2", "CASZ1", "CCDC141"), Median_PoPS = c(0.040097016, 
0.066717199, 0.119115226, 0.565579881, 0.152149101, -0.002287785, 
0.030722876, 0.202042945, 0.121184633, 0.078079842, -0.098154534, 
0.242834185, 0.113019505, 0.022269027, -0.037821713, 0.152854103, 
0.054061764, 0.070453112, 0.112837399, 0.108880234, -0.203012964, 
0.077142703, 0.225070177, -0.01134475, 0.162986282, 0.490838522, 
0.45760657, 0.045157219, 0.114610058, 0.089620962, 0.193743901, 
0.110843458, 0.123453215, 0.264372212, 0.04456751, 0.107923069, 
-0.017319883, 0.08909364, -0.064415409, 0.203052356, 0.033044087, 
0.376682059, 0.049786121, 0.000317271, 0.077634837, 0.171648497, 
0.252097225, 0.440276142, 0.140784241, 1.090303171), entrezgene_id = c(11332L, 
59L, 88L, 81L, 112L, 84890L, 113622L, 27125L, 27161L, 191L, 84920L, 
57538L, 51421L, 51434L, 23294L, 307L, 84364L, 201176L, 10425L, 
80210L, 10094L, 434L, 482L, 490L, 6311L, 93010L, 9531L, 8938L, 
55024L, 54828L, 79365L, 655L, 659L, 6046L, 114900L, 81563L, 79169L, 
54980L, 205327L, 51161L, 11094L, 783L, 784L, 797L, 813L, 817L, 
818L, 845L, 54897L, 285025L)), class = c("data.table", "data.frame"
), row.names = c(NA, -50L), sorted = "Gene")

# Getting KEGG pathways for my genes:

kegg_organism = "hsa"
kegg_enrich <-  enrichKEGG(gene   = d$entrezgene_id,
                           organism     = 'hsa',
                           pvalueCutoff = 0.05,
                           pAdjustMethod = 'BH')

kegg <- setReadable(kegg_enrich, 'org.Hs.eg.db', 'ENTREZID')
kegg_genes <- kegg[,]

# Getting the top 5 most significantly enriched pathways to plot their network:

keggtop5 <- kegg_genes[order(kegg_genes$p.adjust),]
keggtop5 <- keggtop5[1:5,]
top5all <- enrichDF2enrichResult(keggtop5)
gene_list_scores<-na.omit(gene_list_scores)
filtered_kegg_genes <- kegg_genes[!grepl("cancer", kegg_genes$Description, ignore.case = TRUE), ]
top5paths <- head(filtered_kegg_genes[order(filtered_kegg_genes$pvalue), ], 5)
top5all <- enrichDF2enrichResult(top5paths, pAdjustMethod='BH')

scores <- setNames(d$Median_PoPS, d$entrezgene_id)

p <- cnetplot(top5all, showCategory = 5,
             foldChange=scores,
             scale_color_gradient2(name='associated data', low='steelblue', high='firebrick'))

# or

p <- cnetplot(top5all,showCategory = 5, color.params = list(foldChange = scores)

[guidohooiveld]

So if I understand you correctly, you would like to visualize the network of the top 5 most significant gene sets in a cnetplot, thereby using your preferred color scale for the values of Median_PoPS?

I would do it like below; note that you can change the default colors using options(enrichplot.colours = c("steelblue","firebrick")). See also: YuLab-SMU/enrichplot#268

Moreover, since the output is a ggplot2 object, this can (even) be further modified if needed.

Also note that the object gene_list_scores is not defined in your code snippet...

> library(clusterProfiler)
> library(ggplot2)
> 
> ## generate input data
> d <- structure(list(Gene = c("ACOT7", "ACTA2", "ACTN2", "ACTN4", "ADCY6", 
+ "ADO", "ADPRHL1", "AFF4", "AGO2", "AHCY", "ALG10", "ALPK3", "AMOTL2", 
+ "ANAPC7", "ANKS1A", "ANXA4", "ARFGAP2", "ARHGAP27", "ARIH2", 
+ "ARMC9", "ARPC3", "ASIP", "ATP1B2", "ATP2B1", "ATXN2", "B3GNT7", 
+ "BAG3", "BAIAP3", "BANK1", "BCAS3", "BHLHE41", "BMP7", "BMPR2", 
+ "BRD2", "C1QTNF4", "C1orf21", "C1orf35", "C2orf42", "C2orf69", 
+ "C3orf18", "CACFD1", "CACNB2", "CACNB3", "CALCB", "CALU", "CAMK2D", 
+ "CAMK2G", "CASQ2", "CASZ1", "CCDC141"), Median_PoPS = c(0.040097016, 
+ 0.066717199, 0.119115226, 0.565579881, 0.152149101, -0.002287785, 
+ 0.030722876, 0.202042945, 0.121184633, 0.078079842, -0.098154534, 
+ 0.242834185, 0.113019505, 0.022269027, -0.037821713, 0.152854103, 
+ 0.054061764, 0.070453112, 0.112837399, 0.108880234, -0.203012964, 
+ 0.077142703, 0.225070177, -0.01134475, 0.162986282, 0.490838522, 
+ 0.45760657, 0.045157219, 0.114610058, 0.089620962, 0.193743901, 
+ 0.110843458, 0.123453215, 0.264372212, 0.04456751, 0.107923069, 
+ -0.017319883, 0.08909364, -0.064415409, 0.203052356, 0.033044087, 
+ 0.376682059, 0.049786121, 0.000317271, 0.077634837, 0.171648497, 
+ 0.252097225, 0.440276142, 0.140784241, 1.090303171), entrezgene_id = c(11332L, 
+ 59L, 88L, 81L, 112L, 84890L, 113622L, 27125L, 27161L, 191L, 84920L, 
+ 57538L, 51421L, 51434L, 23294L, 307L, 84364L, 201176L, 10425L, 
+ 80210L, 10094L, 434L, 482L, 490L, 6311L, 93010L, 9531L, 8938L, 
+ 55024L, 54828L, 79365L, 655L, 659L, 6046L, 114900L, 81563L, 79169L, 
+ 54980L, 205327L, 51161L, 11094L, 783L, 784L, 797L, 813L, 817L, 
+ 818L, 845L, 54897L, 285025L)), class = c("data.table", "data.frame"
+ ), row.names = c(NA, -50L), sorted = "Gene")
> 
> ## check
> head(d)
Key: <Gene>
     Gene  Median_PoPS entrezgene_id
   <char>        <num>         <int>
1:  ACOT7  0.040097016         11332
2:  ACTA2  0.066717199            59
3:  ACTN2  0.119115226            88
4:  ACTN4  0.565579881            81
5:  ADCY6  0.152149101           112
6:    ADO -0.002287785         84890
> 
> ## perform KEGG-based overrepresentation analysis
> kegg_enrich <-  enrichKEGG(gene   = d$entrezgene_id,
+                            organism     = 'hsa',
+                            pvalueCutoff = 0.05,
+                            pAdjustMethod = 'BH')
> 
> ## converts geneids into symbols
> kegg <- setReadable(kegg_enrich, 'org.Hs.eg.db', 'ENTREZID')
> 
> kegg
#
# over-representation test
#
#...@organism    hsa 
#...@ontology    KEGG 
#...@keytype     ENTREZID 
#...@gene        chr [1:50] "11332" "59" "88" "81" "112" "84890" "113622" "27125" "27161" ...
#...pvalues adjusted by 'BH' with cutoff <0.05 
#...19 enriched terms found
'data.frame':   19 obs. of  11 variables:
 $ category   : chr  "Organismal Systems" "Organismal Systems" "Organismal Systems" "Organismal Systems" ...
 $ subcategory: chr  "Circulatory system" "Endocrine system" "Digestive system" "Endocrine system" ...
 $ ID         : chr  "hsa04261" "hsa04925" "hsa04971" "hsa04921" ...
 $ Description: chr  "Adrenergic signaling in cardiomyocytes" "Aldosterone synthesis and secretion" "Gastric acid secretion" "Oxytocin signaling pathway" ...
 $ GeneRatio  : chr  "7/29" "5/29" "4/29" "5/29" ...
 $ BgRatio    : chr  "154/8662" "98/8662" "76/8662" "154/8662" ...
 $ pvalue     : num  5.51e-07 1.60e-05 1.10e-04 1.40e-04 1.78e-04 ...
 $ p.adjust   : num  6.44e-05 9.37e-04 3.63e-03 3.63e-03 3.63e-03 ...
 $ qvalue     : num  4.75e-05 6.91e-04 2.68e-03 2.68e-03 2.68e-03 ...
 $ geneID     : chr  "ADCY6/ATP1B2/ATP2B1/CACNB2/CACNB3/CAMK2D/CAMK2G" "ADCY6/ATP1B2/ATP2B1/CAMK2D/CAMK2G" "ADCY6/ATP1B2/CAMK2D/CAMK2G" "ADCY6/CACNB2/CACNB3/CAMK2D/CAMK2G" ...
 $ Count      : int  7 5 4 5 4 4 4 3 5 4 ...
#...Citation
 T Wu, E Hu, S Xu, M Chen, P Guo, Z Dai, T Feng, L Zhou, W Tang, L Zhan, X Fu, S Liu, X Bo, and G Yu.
 clusterProfiler 4.0: A universal enrichment tool for interpreting omics data.
 The Innovation. 2021, 2(3):100141 

> 
> ## prepare scores
> scores <- setNames(d$Median_PoPS, d$entrezgene_id)
> 
> 
> ####
> #### From now on I diverge from your code:
> ####
> 
> ## Get the top 5 most significantly enriched pathways.
> ## Note that by default the results are already sorted on significance.
> top.n <- 5
> keggtop5 <- as.data.frame(kegg_enrich)$Description[1:top.n]
> 
> 
> ## set/change the color to what you prefer
> options(enrichplot.colours = c("steelblue","firebrick"))
> 
> ## note the new way of what to use as color in the cnetplot
> color.params = list(foldChange = scores)
> p <- cnetplot(kegg,
+               showCategory = keggtop5,  # names of gene sets/pathways
+               color.params=color.params)
Scale for size is already present.
Adding another scale for size, which will replace the existing scale.
> 
> print(p)
> 
> ## since 'p' is a ggplot2 object, this can be further modified if needed.
> ## along the same lines as: https://support.bioconductor.org/p/p133748/
> library(scales)
> 
> min.value <- floor( min(p$data$color, na.rm = TRUE) )
> max.value <- ceiling( max(p$data$color, na.rm = TRUE) )
> 
> 
> #red-green colour scale
> p2 <- p + scale_color_gradientn(name = "fold change",
+           colours = c("green", "red"),
+           values = rescale(c(min.value, 0, max.value)),
+           limits= c(min.value, max.value), 
+           breaks=c(min.value , 0, max.value) )
Scale for colour is already present.
Adding another scale for colour, which will replace the existing scale.
> 
> print(p2)
> 
> #red-white-green colour scale, and legend box labelled 'Median PoPS'.
> p3 <- p + scale_color_gradientn(name = "Median PoPS",
+           colours = c("green", "white","red"),
+           values = rescale(c(min.value, 0, max.value)),
+           limits= c(min.value, max.value), 
+           breaks=c(min.value , 0, max.value) )
Scale for colour is already present.
Adding another scale for colour, which will replace the existing scale.
> 
> print(p3)
> 
> 

Outputs:

p (colour scale set to steelblue - firebrick via options(...)):

p2 (colour scale set to red - green via scale_color_gradientn()):

p3 (colour scale set to red - white - green via scale_color_gradientn(), and legend box labelled Median PoPS)

[hlnicholls]

This is exactly what I needed, thank you very much for taking the time to look into this! This has completely resolved my issue.