Hi rhotuser, Your question is really not about R, but about understanding IR spectroscopy methods for soil composition. That's not my field, and you will be lucky to find someone on this help list who is: 1) an expert in the field 2) willing to explain the methods used in the prospectr package Maybe reading an introduction to the field will be a good start:
https://en.wikipedia.org/wiki/Near-infrared_spectroscopy then a Google search for "NIR soil analysis" Jim On Fri, Sep 20, 2019 at 3:39 AM <rhotu...@yahoo.co.jp> wrote: > > Dear Sir, > I want to use the "prospectr" for the obtained spectra like the attached > file, "Nirspectra". > However, my understanding level of the data structure of "NIRsoil" is not > yet enough. > reference: > https://cran.r-project.org/web/packages/prospectr/vignettes/prospectr-intro.pdf > data(NIRsoil)str(NIRsoil) -----> A little complicated for me. > I have 2 questions. > I want to make the data structure of "Nirspectra" to be applied directly for > "prospectre". > 1. Please tell me the detail way for giving suitable data structure toward　 > "Nirspectra". > abc<-read.csv('Nirspectra.csv') > > > ------------------------------------------------------------------------------- > My estimation of the final data sturucture of "Nirspectra" for the direct > use of "prospectr" > 'data.frame': 57 obs. of 3 variables: $ train: num 1 1 0 1 1 0 1 1 0 1 > ... $ dep : num 87.300003 87 87.099998 89.699997 84.900002 84.699997 > 89.300003... $ spc : num [2:58, 1:36] ... > 2. Which is right, num [2:58, 1:36] or num [1:58, 1:36] ? > Best Regards,______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
