I would like to add a density curve to a histogram while keeping the y-axis with count values. The answer on this forum describes how to add a density curve to a histogram but with the probability on the y-axis. Here is the code:
Pkg.add("Plots")
Pkg.add("Distributions")
using Distributions, Plots
dist = Normal(0, 1)
data = rand(dist, 1000)
histogram(data, normalize=true)
plot!(x->pdf(dist, x), xlim=xlims())
Output:
It nicely creates the histogram with a density curve and density y-axis. But I was wondering if anyone knows how to add a density curve to a histogram while keeping the y-axis as count values in Julia
?
If you still wish to use automatic binning like in the example in the question, then I've found the following will work:
plt = histogram(data, normalize=false)
pre_factor = plt.series_list[1]
factor = pre_factor.plotattributes[:bar_width][1]
plot!(x->length(data)*factor*pdf(dist, x), xlim=xlims())
The code just digs out the width of the bars in the histogram to properly scale the pdf
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Also, you might want to look at charts with 2 y-axes. They do appear in some places, and I don't know how to draw them, but maybe someone else does (or it needs investigation).