Apparently, the iNEXT package was first described in an academic paper
published in 2016, although CRAN archives go back to 2015.
http://chao.stat.nthu.edu.tw/wordpress/paper/120_pdf_appendix.pdf
https://cran.r-project.org/src/contrib/Archive/iNEXT/

The vignette below has a section entitled "General Customization"
which talks about color. See the four lines of code I've added to the
vignette's code to get a general idea what to do.
https://cran.r-project.org/web/packages/iNEXT/vignettes/Introduction.html

library(iNEXT)
library(ggplot2)
library(gridExtra)
library(grid)
data("spider")
out <- iNEXT(spider, q=0, datatype="abundance")
g <- ggiNEXT(out, type=1, color.var = "site")
print(g)
g1 <- g + scale_colour_manual(values=c("yellow", "green"))
print(g1)
g2 <- g1 + scale_fill_manual(values=c("yellow", "green"))
print(g2)

HTH, Bill.

W. Michels, Ph.D.




On Wed, Oct 23, 2019 at 11:13 AM David Winsemius <dwinsem...@comcast.net> wrote:
>
>
> On 10/22/19 12:48 PM, Luigi Marongiu wrote:
> > I thought it was a major package for ecological analysis.
>
>
> Yours is the first question in 20 years of Rhelp about the package iNEXT.
>
>
> --
>
> David
>
> > Anyway,
> > thank you for the tips. I'll dip from there.
> >
> > On Tue, Oct 22, 2019 at 5:29 PM Jeff Newmiller <jdnew...@dcn.davis.ca.us> 
> > wrote:
> >> Probably, assuming that function returns a ggplot object. You will need to 
> >> identify the levels of the factor used for distinguishing groups, and add 
> >> a scale_colour_manual() to the ggplot object with colors specified in the 
> >> same order as those levels.
> >>
> >> Support for obscure packages is technically off-topic here ... if you need 
> >> a more specific answer you may need to correspond with the package authors 
> >> or use their suggested support resources.
> >>
> >> On October 22, 2019 2:18:49 AM PDT, Luigi Marongiu 
> >> <marongiu.lu...@gmail.com> wrote:
> >>> Dear all,
> >>> is it possible to provide custom color to the rarefaction curve of the
> >>> package iNEXT (ggiNEXT)?
> >>> If I have these data:
> >>> ```
> >>> library(iNEXT)
> >>> library(ggplot2)
> >>> data(spider)
> >>> out <- iNEXT(spider, q=0, datatype="abundance")
> >>> ggiNEXT(out, type=1)
> >>> ```
> >>> can i colour the lines with, let's say, yellow and green?
> >>> Thank you
> >> --
> >> Sent from my phone. Please excuse my brevity.
> >
> >
>
> ______________________________________________
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