Hello,
applying Carlas's solution I got a failure in line 20 since plot.New()
returns a pointer but no pointer, error pair.
Only after changing usage of New() I got the scatter-demo running. May be
error message can be enhanced :-)
scatter-demo]$ go build
# scatter-demo
./main.go:20:9: assignment mismatch: 2 variables but plot.New returns 1
values
20 p := plot.New() 21 if p == nil { 22 panic("Plotter
cannot be created") 23 }
BR,
Roland
Am Mo., 17. Mai 2021 um 16:38 Uhr schrieb Fred <[email protected]>:
> Thanks Carla and Sébastien for your quick answer !
>
> Carla your solution works, when I use modules I do not have font errors.
>
> What is strange is that I was not using modules in any computer to try
> this example and it was working in one an not the other :)
>
> Le lundi 17 mai 2021 à 15:10:55 UTC+2, Sebastien Binet a écrit :
>
>> Salut Fred,
>>
>> On Mon May 17, 2021 at 14:11 CET, Fred wrote:
>> > Hi,
>> > I have 2 computers with Linux Manjaro and go version 1.16.3.
>> > The same scatter plot
>> > <https://gist.github.com/sbinet/602522b7399ead414e279e2261d81095>
>> works
>> > on
>> > one computer and produces on the other these already known errors :
>> > <https://groups.google.com/g/gonum-dev/c/a8sC1fzV3Mo>
>> >
>> > # gonum.org/v1/plot/text
>> > /home/fred/GO/src/gonum.org/v1/plot/text/latex.go:153:3: cannot use
>> > hdlr.Fonts.Lookup(rm, fnt.Size).Face (type *sfnt.Font) as type
>> > *truetype.Font in field value
>> > /home/fred/GO/src/gonum.org/v1/plot/text/latex.go:154:3: cannot use
>> > hdlr.Fonts.Lookup(rm, fnt.Size).Face (type *sfnt.Font) as type
>> > *truetype.Font in field value
>> > /home/fred/GO/src/gonum.org/v1/plot/text/latex.go:155:3: cannot use
>> > hdlr.Fonts.Lookup(it, fnt.Size).Face (type *sfnt.Font) as type
>> > *truetype.Font in field value
>> > /home/fred/GO/src/gonum.org/v1/plot/text/latex.go:156:3: cannot use
>> > hdlr.Fonts.Lookup(bf, fnt.Size).Face (type *sfnt.Font) as type
>> > *truetype.Font in field value
>> > /home/fred/GO/src/gonum.org/v1/plot/text/latex.go:157:3: cannot use
>> > hdlr.Fonts.Lookup(bfit, fnt.Size).Face (type *sfnt.Font) as type
>> > *truetype.Font in field value
>> > /home/fred/GO/src/gonum.org/v1/plot/text/latex.go:221:3: cannot use
>> > op.Glyph.Font (type *truetype.Font) as type *sfnt.Font in field value
>>
>> this should indeed be fixed w/ gonum/[email protected].
>>
>> >
>> > an update does not fix the error.
>> >
>> > go get -u gonum.org/v1/plot/...
>> > # cd /home/fred/GO/src/github.com/go-latex/latex; git pull --ff-only
>> > Votre information de configuration indique de fusionner avec la
>> > référence
>> > 'refs/heads/master'
>> > du serveur distant, mais cette référence n'a pas été récupérée.
>> > package github.com/go-latex/latex/drawtex: exit status 1
>>
>> this error may come from the fact that go-latex/latex is now using
>> 'main' as its main branch in lieu of 'master'.
>>
>> hth,
>> -s
>>
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