Use heatmaply to create heatmap with raw values/data without transformations?

Question

When creating a heatmap with heatmaply::heatmaply(), some transforms are performed on the raw data. This is evident in the following example where some of the iris dataset is provided, yet hovering over the heatmap shows some negative values (which weren't in the original data provided to heatmaply()), and the colorbar on the side also shows negative values as well.

https://i.sstatic.net/Mt0vGm.png

library(heatmaply)
mat <- iris[1:20, 1:4] %>% as.matrix
p <- heatmaply(mat, 
                   dendrogram = "none",
                   xlab = "", ylab = "", 
                   main = "",
                   scale = "column",
                   margins = c(60,100,40,20),
                   grid_color = "white",
                   grid_width = 0.00001,
                   titleX = FALSE,
                   hide_colorbar = FALSE,
                   branches_lwd = 0.1,
                   label_names = c("Country", "Feature:", "Value"),
                   fontsize_row = 5, fontsize_col = 5,
                   labCol = colnames(mat),
                   labRow = rownames(mat),
                   heatmap_layers = theme(axis.line=element_blank()),
                   colors = rev(c("000000", heat.colors(30)[1:28]))
)

p

Different scale to iris[1:20, 1:4]:

https://i.sstatic.net/nuMcn.png

Question

How can heatmaply::heatmaply() be made to generate a heatmap based purely on the raw values provided (no transformations)?

Note: open to using other packages/functions/suggestions

Answer 1

Remove the scale argument - the default is "none". Or change it to "none".

heatmaply(mat, 
          dendrogram = "none",
          xlab = "", ylab = "", 
          main = "",
          # scale = "column",  # <-- remove this line. Or change to "none"
          margins = c(60,100,40,20), ...