How can i plot a Correlation HeatMap?

[folleyz]

@rafael.guerra

xrotation=90

Nice! thx for the tip.

Below the final function to plot a corr heatmap:

function corrheatmap(df::AbstractDataFrame ,colnames::Vector{Symbol})
	a = DataFrame(cor(Matrix(df[!,colnames])), colnames)
	
	g = []
	b = 1
	for e in 1:length(colnames)
		for i in eachrow(a[!,colnames])
			if b == 1 && e != 1
				c = (e, e, (string(round(i[1],digits = 3)), 8, :red, :center))
			elseif b == e
				c = (e, 1, (string(round(i[1],digits = 3)), 8, :red, :center))
			else
				c = (e, b, (string(round(i[e],digits = 3)), 8, :red, :center))
			end
			
			if b < length(colnames) 
				b += 1
			else
				b = 1
			end
			push!(g,c)
		end
	end

	k = Vector{Tuple{Int64, Int64, Tuple{String, Int64, Symbol, Symbol}}}(g)

	@df a Plots.heatmap(cols(colnames);
		xticks=(1:length(colnames), colnames),
		yticks=(1:length(colnames), colnames),
		xrotation = 90)
		annotate!(k)
	
end

corrheatmap(df,[:Age,:Balance,:EstimatedSalary])