unexpected xml tag `<?xml version="1.0" encoding="utf-8"?>` occurs

[terasakisatoshi]

<?xml version="1.0" encoding="utf-8"?> occurs when I insert code related to gr backend Plots

using Plots
gr() # switch to GR backend
plot(sin)

on the other hand, when I switch to pyplot backend I get no issue. 🤔

[piever]

Thanks for reporting this! Somehow the svg generated by GR also includes that xml tag, which does not appear in html files, but markdown gets confused with it.

I wonder where this should be fixed exactly, maybe at GR?

[piever]

A better solution to this would probably be to implement something like https://github.com/piever/Remark.jl/issues/22, and during the build step saving the svg to a file rather than directly into the generated html.

[terasakisatoshi]

• Thank you for your advice.
• I've modified my source code as follow. It saves the plotting result using savefig and display the result using markdown syntax ![](path/to/img/png)

using Plots
gr()
x = -π:0.01:π
p1 = plot(x, cos.(x))
p2 = plot(x, sin.(x))
plot(p1, p2, layout=(2,1))
savefig("saved.png") #hide

# ![not found](saved.png)

The result should be as follow:

[terasakisatoshi]

I've confirmed the workaround above solves my problem:

• https://terasakisatoshi.github.io/MathSeminar.jl/remark/build/#5

[piever]

Thanks for verifying that it works! I think this should be the preferred approach anyways, I'll add it to the docs.