How do I add a bar of categorical colors to a plotly heatmap?

📊 Plotly Python
1

The plotly code in R:

a1 <- list(
  size=1
)
a <- list(
  title="BLAST Hit ID",
  tickangle="45",
  tickfont=a1
)
b <- list(
  title="Query ID",
  tickfont=a1
)
plot_ly(z=numericMatrix,
        y=rownames(numericMatrix),
        x=colnames(numericMatrix),
        type="heatmap") %>% layout(xaxis=a,yaxis=b)

0148.png1590×833 85.3 KB

I would like to have a bar that runs down the left side of the heatmap that contains different colors, such as in the following plot made with heatmap.2
https://friends.manas.ca/Rplot37.png
This was generated with:

par(lend=1, xpd=TRUE)
heatmap.2(numeric_results,
          Rowv=FALSE,
          Colv=FALSE,
          dendrogram="none",
          trace="none",
          margins=c(8,9),
          cexRow=0.5,
          cexCol=0.5,
          srtCol=45,
          RowSideColors = c(rep("gray", 8), rep("blue", 17), 
            rep("black", 16), rep("green", 3), 
            rep("purple", 31)))
legend(x=1.07, y=-0.07 ,
       legend=c("Bundibugyo", "Reston", "Sudan", "Tai Forest", "Zaire"),
       col=c("gray", "blue", "black", "green","purple"), lty = 1, lwd = 10, 
      bty="n", cex=0.5, seg.len=0.2, xjust=0)

Thanks.

(first asked here https://stackoverflow.com/questions/34449419/how-do-i-add-a-bar-of-categorical-colors-to-a-plotly-heatmap )

2

I would like to have a bar that runs down the left side of the heatmap that contains different colors

I’m not sure what you mean by this. What wold the colors represent in this case?

3

If you look at this image: https://friends.manas.ca/Rplot37.png you’ll see a vertical bar with the colors gray, blue, black, green & purple. The colors represent a different group of genomes, one for each species of the ebolavirus genus.

4

You could add a heatmap subplot to your graph with a custom colorscale mapping to gray, blue, black, green & purple as desired.