Some palettes with dark colors at one end of the palette hide the shape of the volcano in the dark colors. Viridis is bad.
pal.volcano(pal, n = 100, main = "")
pal | A palette function or a vector of colors. |
---|---|
n | The number of colors to display for palette functions. |
main | Main title |
None.
What to look for:
1. Can you locate the highest point on the volcano?
2. Are the upper-right and lower-right corners the same elevation?
3. Do any Mach bands circle the peak?
pal.volcano(parula)pal.volcano(brewer.rdbu) # Mach banding is badpal.volcano(warmcool, main="warmcool") # No Mach band