Re: [go-nuts] gonum plot : font error
@Roland : I saw this change too, removing the error variable fix the
problem :)
Le mardi 18 mai 2021 à 12:44:40 UTC+2, rol...@gmail.com a écrit :
> 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 :
>
>> 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/pl...@v0.9.0.
>>>
>>> >
>>> > 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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>> .
>>
>
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Re: [go-nuts] gonum plot : font error
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/pl...@v0.9.0. > > > > > 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 > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/efb3fb0c-cbeb-4815-a0d9-ee7a4b638ad8n%40googlegroups.com.
[go-nuts] gonum plot : font error
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 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 the go/src/gonum.org/v1/plot/font directory is the same on both computers. Do I need to install some missing fonts ? Thanks in advance, Fred -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/826ba085-1506-4f07-a44e-c334fd7198bdn%40googlegroups.com.
[go-nuts] Re: Calculation of the combinations between an unlimited number of slices
@Howard thank you very much for this nice analysis of my code ! -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[go-nuts] Re: Calculation of the combinations between an unlimited number of slices
Thanks @Jake Le jeudi 7 décembre 2017 01:01:46 UTC+1, Jake Montgomery a écrit : > > On Monday, December 4, 2017 at 2:56:19 PM UTC-5, Fred wrote: >> >> >> > Perhaps start with Go Slices: usage and internals > <https://blog.golang.org/go-slices-usage-and-internals>, for a more > complete understanding of slice pitfalls. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[go-nuts] Re: Calculation of the combinations between an unlimited number of slices
it seems that making a copy of the temp var, replacing :
temp = append(temp, c1)
by :
temp = append(temp, append([]int{}, c1...))
helps, but still unclear for me why the problem was only visible on slice
4...
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[go-nuts] Calculation of the combinations between an unlimited number of slices
Hi !
I have made a recursive algorithm to compute all the combinations between
an unlimited number of slices. The algorithm does good results for 2 and 3
slices.
For example with 3 slices a,b,c :
a := []int{1,2}
b := []int{3,4}
c := []int{5,6}
final comb [[1 3 5] [1 3 6] [1 4 5] [1 4 6] [2 3 5] [2 3 6] [2 4 5] [2 4
6]] // good
, but I have a strange bug with 4 slices : only the last element of the
slice 4 is recorded.
a := []int{1,2}
b := []int{3,4}
c := []int{5,6}
d := []int{7,8,9}
final comb [[1 3 5 9] [1 3 5 9] [1 3 5 9] [1 3 6 9] [1 3 6 9] [1 3 6 9] [1
4 5 9] [1 4 5 9]
[1 4 5 9] [1 4 6 9] [1 4 6 9] [1 4 6 9] [2 3 5 9] [2 3 5 9] [2 3 5 9] [2 3
6 9] [2 3 6 9]
[2 3 6 9] [2 4 5 9] [2 4 5 9] [2 4 5 9] [2 4 6 9] [2 4 6 9] [2 4 6 9]]
// bad result, the combination [1 3 5 7] and [1 3 5 8] are missing
The error occurs between these 2 steps
c1 := append(c, s)
temp = append(temp, c1)
when c1 is appended to temp,
i,j,k = 2, 0, 0 - temp = [[1 3 5 7]]
[[1 3 5 7]] is replaced by [1 3 5 8] inside the loop and [1 3 5 7]
combination is lost !
i,j,k =2, 0, 1 - temp = [[1 3 5 8] [1 3 5 8]]
i,j,k =2, 0, 2 - temp = [[1 3 5 9] [1 3 5 9] [1 3 5 9]]
Here is the algorithm. With 5 slices the results are good except for the
slice 4 combinations. I did not found the bug, if you see it, thank you
for your help !
package main
import (
"fmt"
)
func main() {
a := []int{1,2}
b := []int{3,4}
c := []int{5,6}
d := []int{7,8,9}
//e := []int{1,2}
seq := [][]int{a, b, c, d} // slice to combine with comb [[b1 b2] [c1
c2 c3]]
fmt.Println("final comb ", combIntSlices(seq) )
}
// function to build the combinations
func combIntSlices(seq [][]int) (out [][]int) {
// fill combSeq with the first slice of seq
var combSeq [][]int // combSeq is the initial [][]int, for example
[[1] [2] [3]]
for _, i := range seq[0] {
combSeq = append(combSeq, []int{i})
}
seq = seq[1:] // seq is the [][]slice to combine with combSeq [[4
5] [6 7 8]]
fmt.Println(seq, len(seq))
// rec recursive funtion
var rec func(int, [][]int, [][]int)
rec = func(i int, seq, combSeq [][]int) {
var temp [][]int // temporary slice to append combinations
last := len(seq) - 1
fmt.Println(combSeq, "-", seq)
for j, c := range combSeq { // for each slice in combSeq slice
for k, s := range seq[i] { // append each element of the
slice i in seq
c1 := append(c, s)
temp = append(temp, c1)
fmt.Println(i,j,k, "- temp =", temp, " c=", c)
}
combSeq = temp // at this step temp has recorded one round
of combination
}
if i == last { // if the length of seq is reached, the solution
is returned
out = combSeq
return
} else {
rec(i+1, seq, combSeq) // if the length of seq is not
reached, rec is called to perform another step of combinations
}
}
rec(0, seq, combSeq) // start the first step of combinations
return out
}
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combin-5.go
Description: Binary data
