error running first example of the tutorial: wrong local file association ?

[kforner]

I just installed julia 1.4.2 using the linux binaries provided by https://julialang.org/downloads/
then I installed Gadfly and RDatasets using the pkg shell (add Gadfly, add RDatasets).

When I run this code:

using Gadfly
using RDatasets
# takes a long... time
iris = dataset("datasets", "iris")

plot(iris, x=:SepalLength, y=:SepalWidth, Geom.point)

Then I have an image view app that pops up with an error like:

Could not load image “jl_X6LoVH.html”.
Error domain 1 code 76 on line 6 column 10 of file:///tmp/jl_X6LoVH.html: Opening and ending tag mismatch: meta line 0 and head

I guess the error makes sense if the image viewer parses a html file instead of an image.

My questions:

• am I the only one getting this ?
• is this a local problem with file association ?
• any hint of solving it ?

Thanks.
Karl

[Mattriks]

Does saving to a file work? e.g.

p = plot(iris, x=:SepalLength, y=:SepalWidth, Geom.point)
draw(PNG("iris1.png"), p)
draw(PDF("iris1.pdf"), p)
draw(SVG("iris1.svg"), p)

Does this show an error? e.g.

p = plot(iris, x=:SepalLength, y=:SepalWidth, Geom.point)
draw(PNG(), p)

[kforner]

draw(PNG("iris1.png"), p)

ERROR: The Cairo and Fontconfig packages are necessary for saving as PNG.
Add them with the package manager if necessary, then run import Cairo, Fontconfig before invoking PNG.

draw(PDF("iris1.pdf"), p)

ERROR: The Cairo and Fontconfig packages are necessary for saving as PDF.
Add them with the package manager if necessary, then run import Cairo, Fontconfig before invoking PDF.

draw(SVG("iris1.svg"), p)

This works but the image has a transparent background

draw(PNG(), p)

ERROR: The Cairo and Fontconfig packages are necessary for saving as PNG.
Add them with the package manager if necessary, then run import Cairo, Fontconfig before invoking PNG.

installing Cairo fixes the above errors.
The Pdf has a non-transparent background.

draw(PNG(), p)

Compose.Image{Compose.PNGBackend}(IOBuffer(data=UInt8[...], readable=true, writable=true, seekable=true, append=false, size=47965, maxsize=Inf, ptr=47966, mark=-1), Cairo.CairoSurfaceBase{UInt32}(Ptr{Nothing} @0x0000000000000000, 535.0, 378.0), Cairo.CairoContext(Ptr{Nothing} @0x0000000000000000, Cairo.CairoSurfaceBase{UInt32}(Ptr{Nothing} @0x0000000000000000, 535.0, 378.0), Ptr{Nothing} @0x000000000533b170), 534.5059133378628, 377.9527559055118, RGBA{Float64}(0.0,0.0,0.0,0.0), RGBA{Float64}(0.0,0.0,0.0,1.0), Float64[], Compose.LineCapButt(), Compose.LineJoinMiter(), true, 0.3mm, 3.880555555555555mm, "Helvetica Neue,Helvetica,Arial,sans", nothing, false, Compose.ImagePropertyState[], Compose.ImagePropertyFrame[], Dict{Type,Union{Nothing, Compose.Property}}(), true, false, nothing, true, true, 3.7795275590551185, nothing, nothing)

[Mattriks]

Yes I should have added import Cairo, Fontconfig (which is necessary for png, pdf). You can control the background using the options in Theme. Type ?Theme or see the Theme section.

Not sure what your original error is due to. If you can save to a file, then it seems to be a local system issue about your default display software. You might try the suggestion in this Julia discourse post.

[kforner]

ok thanks