Extend density plot line (along 0)

Specific Domains Visualization
1

If I write

using StatsPlots
density(sqrt.(rand(10000)))
density!(sqrt.(2*rand(10000)))

then I get:
image

The plot would be nicer if the blue line extended all the way to the maximum/minimum x values (along 0). Is there an option for this?

2

If I understand you correctly you want density to pad its estimate with zeros up to some maximum value which is determined by a different call to density? I don’t think there’s an option for this and I’m not even sure how that would work in practice (what if you plot a third density? would the first two plots have to be extended accordingly?) so you need to do it manually by adding something like

julia> plot!(1.1:0.01:1.6, zeros(length(1.1:0.01:1.6)), color = 1, label = "")
3

Instead of inventing new data, you could force the lines to land on the x-axis at y=0.
In this case, just using the argument widen=false would do the trick.

4

Not sure about the widen=false, I tried it but didn’t really seem to work (I increased lw to make things clearer)

using StatsPlots
density(sqrt.(rand(10000)),widen=false,lw=4)
density!(sqrt.(2*rand(10000)),lw=4)

image
(I tried putting the widen=false in various places, and =true, in case I misunderstood something, but with no success)

@nilshg I don’t need it to predict the length of the padding according to the previous call, I agree that this would be weird. But an option like

using StatsPlots
density(sqrt.(rand(10000)),extend=(0.,1.5)
density!(sqrt.(2*rand(10000)))

which then continues the line to the given interval (even if just 0) is what I would be looking for (I’d could then manually set it to whatever I would require). If there’s nothing like that though, trying to stitch things together like you suggest, with separate lines, seem like it might produce an acceptable result.

5

To me it looks good. But some people see a hat, while others a boa and an elephant.