Error with heatmap and ColrSpace

[Al Adams]

Hello, I am try to create a heatmap of correlations. To do so, I essentially followed Benn Jann's code on page 38. For example:

quietly corr hrrscale var1 var2 var3 var4
matrix W = r(C)
heatplot W, values(format(%9.3f)) color(hc1, diverging intensity(.6)) ///
  legend(off) aspectratio(1) lower drop(0)

However, when I run this code, I get the following error

function drop() not declared in class ColrSpace
(120 lines skipped)
(error occurred while loading colorpalette.ado)
r(3000);

I am confused as to why I am getting this error as my code is identical to that of Jann's. When I search for this error online, I have trouble finding any leads. Does anyone know the source of it and how to resolve it?

[Al Adams]

Ben Jann Do you happen to know the source of this issue?

[Ben Jann]

Don't know. Maybe update all involved packages and try again.

ssc install heatplot, replace
ssc install palettes, replace
ssc install colrspace, replace

Note that there has been a change in syntax for specifying palettes; argument diverging is now specified directly after hcl and not as an option after the comma. Example:

sysuse auto, clear
quietly corr price weight mpg turn
matrix W = r(C)
heatplot W, values(format(%9.3f)) color(hcl diverging, intensity(.6)) ///
  legend(off) aspectratio(1) lower drop(0)

Best,
ben

[Nishan Lamichhane]

Ben Jann is it possible to make y scale starts from price to turn in the previous example?

[Ben Jann]

Add option yscale(noreverse):

sysuse auto, clear
quietly corr price weight mpg turn
matrix W = r(C)
heatplot W, values(format(%9.3f)) color(hcl diverging, intensity(.6)) ///
    legend(off) aspectratio(1) lower drop(0) yscale(noreverse)

ben

[Nishan Lamichhane]

Thank you Ben. I created a matrix of the cross-tab results of my data (i was not doing correlation coefficients) and flipped the matrix to make it work. However, yscale(noreverse) also worked without extra work of flipping the matrix. Thanks you once again.