textio: Import and Export of hyperSpec objects...

Usage

read.txt.long(file=stop("file is required"), cols=list(.wavelength =
    expression(lambda/nm), spc = "I / a.u."), header=TRUE, ...)
read.txt.wide(file=stop("file is required"), cols=list(spc = "I / a.u.", .wavelength
    = expression(lambda/nm)), check.names=FALSE, ...)

write.txt.long(object, file=stop("file is required"), order=c(".rownames",
    ".wavelength"), na.last=TRUE, decreasing=FALSE, quote=FALSE,
    sep="", row.names=FALSE, cols=NULL, col.names=TRUE,
    col.labels=FALSE, append=FALSE, ...)

write.txt.wide(object, file=stop("file is required"), cols=NULL, quote=FALSE,
    sep="", row.names=FALSE, col.names=TRUE, header.lines=1,
    col.labels=if (header.lines == 1) FALSE else TRUE, append=FALSE,
    ...)
Import and Export of hyperSpec objects
Besides save and load, two general
ways to import and export data into hyperSpec objects exist.
read.txt.long: Firstly, hyperSpec objects can be imported and exported as ASCII files.
A second option is using the package R.matlab which
provides the functions readMat and
writeMat.
hyperSpec comes with a number of pre-defined functions to import
manufacturer specific file formats. For details, see vignette
("file-io").
read.spc imports Thermo Galactic's .spc file
format, and ENVI files may be read using
read.ENVI.
These functions are very flexible and provide lots of arguments.
If you use them to read or write manufacturer specific ASCII formats,
please consider writing a wrapper function and contributing this function
to hyperSpec.  An example is in the flu vignette (see
vignette ("flu", package = "hyperSpec").
Note that R accepts many packed formats for ASCII files, see
connections. For .zip files, see
unzip.
For further information, see the examples below and the documentation of
R.matlab.
read.txt.wide: Besides save and load, two general ways to import and
export data into hyperSpec objects exist.
Firstly, hyperSpec objects can be imported  and exported as ASCII files.
A second option is using the package R.matlab
which provides the functions readMat and
writeMat.
hyperSpec comes with a number of pre-defined functions to import
manufacturer specific file formats. For details, see vignette
("fileio").
read.spc imports Thermo Galactic's .spc file
format, and ENVI files may be read using
read.ENVI.  
These functions are very flexible and provide lots of arguments. 
If you use them to read or write manufacturer specific ASCII formats,
please consider writing a wrapper function and contributing this
function to hyperSpec.  An example is in the flu vignette
(see vignette ("flu", package = "hyperSpec").
Note that R accepts many packed formats for ASCII files, see
connections. For .zip files, see unzip.
For further information, see the examples below, vignette ("fileio") and the documentation
of R.matlab.
read.txt.long
import
export
[object Object]
read.table and
write.table
R.matlab for .mat files
read.ENVI for ENVI data
read.spc for .spc files
Manufacturer specific file formats: scan.txt.Renishawvignette ("fileio") and http://hyperspec.r-forge.r-project.org/fileio.pdf,
respectively
IO
file
file{filename or connection}
cols{the column names specifying the column order.
For data import, a list with elements colname = label; for export a
character vector with the colnames.  Use wavelength to specify the
wavelengths.}
header{the file has (shall have) a header line}
...{arguments handed to read.table and
write.table, respectively.}
decreasing{logical vector giving the sort order}
check.names{handed to read.table. Make sure
this is FALSE, if the column names of the spectra are the
wavelength values.}
object{the hyperSpec object}
order{which columns should be ordered?
order is used as index vector into a data.frame with
columns given by cols.}
na.last{handed to order by
write.txt.long.}
quote,sep,row.names,col.names{have their usual meaning (see
read.table and write.table),
but different default values.}
col.labels{Should the column labels be used rather than the
colnames?}
append{Should the output be appended to an existing file?}
header.lines{Toggle one or two line header (wavelengths in the
second header line) for write.txt.wide}
vignette  ("file-io")
## export & import matlab files
if (require (R.matlab)){
# export to matlab file
writeMat ("test.mat", x = flu[[]], wavelength = flu@wavelength,
label = lapply (flu@label, as.character))
# reading a matlab file
data <- readMat ("test.mat")
print (data)
mat <- new ("hyperSpec", spc = data$x,
wavelength = as.numeric(data$wavelength),
label = data$label[,,1])
}
## ascii export & import

write.txt.long (flu,  file = "flu.txt", cols = c(".wavelength", "spc", "c"), 
order = c("c", ".wavelength"),
decreasing = c(FALSE, TRUE))
read.txt.long (file = "flu.txt", cols = list (.wavelength = expression (lambda / nm), 
spc= "I / a.u", c = expression ("/" (c, (mg/l)))))
write.txt.wide (flu,  file = "flu.txt", cols = c("c", "spc"), 
col.labels = TRUE, header.lines = 2, row.names = TRUE)
write.txt.wide (flu,  file = "flu.txt", col.labels = FALSE, row.names = FALSE)
read.txt.wide (file = "flu.txt", 
cols = list (c=expression ("/"("c", "mg/l")), spc="I / a.u", .wavelength = "lambda / nm"),
header = TRUE)
read.txt.wide
read.txt.wide
write.txt.long
write.txt.long
write.txt.wide
write.txt.wide
Usage

Arguments
