Julia plotting issues: label overlap and LaTeXStings expansion

I am having two mutually exclusive issues with my sample plot below.

The y-axis label and y-tick labels are on top of each other. I have not been able to find a way to shift either. I would like the size of the plot to expand to accommodate the necessary spacing.
I want the y-axis label to be sigma with a subscript theta. It looks like Unicode does not allow a subscript theta. I was hoping to get around this limitation by using LaTeXStrings. However, I cannot get the LatexString to expand into the appropriate form on the plot. Note that issue #1 occurs with or without a LatexString as the ylabel and that LatexString expansion is not working for other string values either.

Sample plot, code, and data are provided below to reproduce. I am using the Juno editor with the Plotly backend on Windows.

using Plots, DelimitedFiles, LaTeXStrings
plotly(linewidth=3,titlefont=18,legendfont=16,guidefont=18,tickfont=14,formatter=:plain)
data=readdlm("hoopstress.txt",skipstart=1)
r=data[:,2]
σθ=data[:,end-1:end]
plot(r,σθ,label=["Simplified Vessel" "Full Vessel"],xlabel="r",ylabel=L"\sigma_\theta")

    Length  Simple  Full
1   0.  53280   56859
2   9.4e-2  52158   55405
3   0.1875  51036   53951
4   0.28125 49915   52498
5   0.375   48793   51044
6   0.46875 47671   49590
7   0.5625  46550   48136
8   0.65625 45428   46682
9   0.75    44307   45228
10  0.84375 43185   43774
11  0.9375  42063   42320
12  1.0312  40942   40866
13  1.125   39883   39411
14  1.2187  39256   38780
15  1.3125  38629   38150
16  1.4062  38002   37519
17  1.5 37375   36888
18  1.5938  36748   36257
19  1.6875  36121   35627
20  1.7813  35494   34996
21  1.875   34867   34365
22  1.9688  34239   33735
23  2.0625  33612   33104
24  2.1562  32985   32473
25  2.25    32389   31842
26  2.3437  31998   31441
27  2.4375  31607   31039
28  2.5312  31216   30637
29  2.625   30825   30235
30  2.7187  30434   29833
31  2.8125  30043   29431
32  2.9062  29652   29029
33  3.  29261   28628
34  3.0938  28870   28226
35  3.1875  28479   27824
36  3.2813  28088   27422
37  3.375   27714   27020
38  3.4688  27452   26693
39  3.5625  27190   26367
40  3.6563  26927   26040
41  3.75    26665   25714
42  3.8438  26403   25387
43  3.9375  26141   25061
44  4.0313  25879   24734
45  4.125   25617   24408
46  4.2187  25354   24081
47  4.3125  25092   23755
48  4.4062  24830   23428
49  4.5 24568   23102

Solution

I filed a PR to solve the problem, which has just been merged into master :-)

So in the future you will be able to do

plotly(linewidth=3,titlefont=18,legendfont=16,guidefont=18,tickfont=14,formatter=:plain)
r = 1:10
σθ = [100000 ./ (1:10) .+ 10000, 100000 ./ (1:10) .- 1000 .+ 10000]
plot(r , σθ, label=["Simplified Vessel" "Full Vessel"],
    xlabel = "r",
    ylabel = L"\sigma_\theta\\\color{white}.",
    yformatter = :plain,
    include_mathjax = "cdn",
    extra_kwargs = :plot)

if you are connected to the internet.

For for local use, if Conda and IJulia are installed and the TeX fonts are copied as described in my previous answer, you can do the following.

import Conda.ROOTENV
function local_mathjax()
    joinpath(ROOTENV, "Lib", "site-packages", "notebook", "static", "components", "MathJax",
            "MathJax.js?config=TeX-AMS-MML_HTMLorMML-full")
end

plotly(linewidth=3,titlefont=18,legendfont=16,guidefont=18,tickfont=14,formatter=:plain)
r = 1:10
σθ = [100000 ./ (1:10) .+ 10000, 100000 ./ (1:10) .- 1000 .+ 10000]
plot(r , σθ, label=["Simplified Vessel" "Full Vessel"],
    xlabel = "r",
    ylabel = L"\sigma_\theta\\\color{white}.",
    yformatter = :plain,
    include_mathjax = local_mathjax(),
    extra_kwargs = :plot)

The formatting of y-axis numbers is now realised via yformatter = :plain and the space in the y-title was achieved by adding a line with a white-formatted dot.

Of course, you could also place a mathjax copy anwhere on your system and put the link in the includ_mathjax argument.

More details on the usage can be found in the PR. Happy coding!