This R package is to facilitate Vegetation Imaging Spectroscopy Analysis (VISA). For more details of this package, you can browseVignettes("visa")
.
# install.packages() # does not work currently
You might encounter problem of package dependencies, such as some functions depend on ggplot2
, ggpmisc
. In such cases, you would have to install the all the dependencies.
if (!require("devtools")) install.packages("devtools")
# devtools::install_github("kang-yu/visa") # install without vignettes
devtools::install_github("kang-yu/visa", build_opts = c("--no-resave-data", "--no-manual"))
You might encounter this problem of install_github(), and in this case, you could try update the {remotes} devtools::install_github("r-lib/remotes")
.
library(visa)
data(NSpec.DF)
x <- NSpec.DF$N # nitrogen
S <- NSpec.DF$spectra[, seq(1, ncol(NSpec.DF$spectra), 10)] # resampled to 10 nm steps
cm.nsr(S, x, cm.plot = TRUE)
You can report your issues of using visa here. Don't know how to report a bug? Check RStudio's Instructions on Writing Good Bug Reports.
You might find useful information by checking the issues reported by others.
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