To extract specific information of a ENVI .hdr-file I want to read it into R, using caTools::read.ENVI(). Unfortunately R just throws ERROR messages and I do not have a clue how to solve this problem.
What I have tried so far is following:
# install.packages("rgdal")
# install.packages("raster")
# install.packages("caTools")
library("rgdal")
library("raster")
library("caTools")
hdr_dir <- "D:/ExploreR/X_Test/01_data/dataset.hdr"
hdr_file <- read.ENVI(hdr_dir, headerfile = paste(hdr_dir, ".hdr", sep = ""))
# Error in read.ENVI(hdr_dir, headerfile = paste(hdr_dir, ".hdr", sep = "")) : read.ENVI: Could not open input header file: D:/ExploreR/X_Test/01_data/dataset.hdr.hdr
Does anybody know how to solve this problem? Thanks a lot for your help in advance!
This should work
read.ENVI("D:/ExploreR/X_Test/01_data/dataset.hdr")
In your code, you should separate creating the file name from using it. You made a mistake in the creating of a filename. Create it first, assign it to a variable, and test if it exists with file.exists. Also, to create filenames it is better to use file.path than paste.
library("caTools")
dirname <- "D:/ExploreR/X_Test/01_data/"
filename <- file.path(dirname, "dataset.hdr")
file.exists(filename)
x <- read.ENVI(filename)
Or simply
f <- "D:/ExploreR/X_Test/01_data/dataset.hdr"
x <- read.ENVI(f)