Dear R users,

I have a numeric table with 140 rows and 30 columns, here I only made partial 
table,  test1,  as an example.  I want to apply a blue color range to the value 
in each cell of  the data frame test1.
I found some R code using DT library. However, I only can see the colored table 
at my R studio viewer window, also only show the first 10 rows.  I hope to save 
the colored table into a PNG file and want to modify the size of each cell, so 
I can apply the code to a much bigger table with 140 rows and 30 column. 

Can you help me?

Thank you very much!!

Ding

s1 <-c(0.085,0.086,0.139,0.129,0.235,0.177,0.000,0.126,0.271,0.000,0.083,0.163)
s2 <-c(0.000,0.093,0.000,0.080,0.072,0.388,0.138,0.107,0.000,0.000,0.474,0.000)
s13 <-c(0.000,0.077,0.000,0.000,0.000,0.000,0.000,0.000,0.000,0.166,0.308,0.000)
s3 <-c(0.000,0.478,0.000,0.332,0.163,0.000,0.000,0.000,0.145,0.469,0.000,0.000)
test1 <-data.frame(s1,s2,s13,s3)
row.names(test1)<c("COH_001","COH_002","COH_003","COH_004","COH_005","COH_006","COH_007","COH_008","COH_009","COH_010","COH_011","COH_012")

library(DT)

dtable1 <- datatable(test1, rownames=TRUE, options = list(lengthChange = FALSE, 
dom='t'))

colRamp <- colorRamp(c("white","blue"))
for(column in names(test1)){
  x <- na.omit(test1[[column]])
  brks <- quantile(x, probs = seq(.05, .95, .01))
  RGB <- colRamp(c(0, (brks-min(x))/(max(x)-min(x))))
  clrs <- apply(RGB, 1, function(rgb){
    sprintf("rgb(%s)", toString(round(rgb,0)))
  })
  dtable1 <- dtable1 %>% 
    formatStyle(column, backgroundColor = styleInterval(brks, clrs))
}

dtable1

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