TVDI Package R

Description

• Use MODIS image to calculate TVDI index
• Make multiple Raster images at the same time
• Can be used to calculate large image files
• UI interface calculates TVDI index
• UI interface exports Golay Savitzky filter images
• The functions in the TVDI package
  • Golay_Raster
  • Golay_GUI
  • Mean_Raster
  • Mask_Multi_Raster
  • IQR_Raster
  • TVDI_process
  • TVDI_Largefiles_process
  • TVDI_GUI
• Notes:
  • After coding on the libraries, need to insert the libraries into DESCRIPTION
  • Note: Using #' importFrom {package} {function} or import {package} to attach package
  • An important issue is that when using rGDAL and gWidgetsRGtk2, it is necessary to add the SystemRequirements section so that R can understand it.

How to Download and Install

• Download and Install from Github

install.packages("devtools")
library(devtools)
install_github("nguyenduclam/TVDIpk")
library(TVDIpk)

• Install from Cran (waiting for update in Cran)

install.packages("TVDIpk")

• Note that if the GTK+ library is not already installed on your system, installation may fail. In that case, please install and load the gWidgetsRGtk2 library beforehand:

install.packages("gWidgetsRGtk2")
library(gWidgetsRGtk2)

• Upon loading gWidgetsRGtk2, an error window will probably appear. This signals that library “GTK+” is not yet installed on your system or is not on your PATH. To install it press “OK”. A new window dialog window will appear, asking if you. want to install “GTK+”. Select “Install GTK” and then “OK” . Windows will download and install the GTK+ library. When it finishes, the RSession should be restarted and you should be ready to go !

• In case RStudio does not automatically restart or continuously asks to install GTK+ again, kill it form “Task Manager” (or restart the R session from RStudio “Session” menu), reload RStudio and the try to reload gWidgetsRGtk2. If it loads correctly, you should be ready to go.

• If it still fails, try downloading the GTK+ bundle links, unzip the archive on a folder of your choice (e.g., C:\\Program Files\\GTK+), then add the path to its “bin” subfolder (e.g., C:\\Program Files\\GTK+\\bin\\ to your system PATH environment variable.

• Restart your system and try loading again gWidgetsRGtk2: if it loads ok, you should be ready to install TVDIpk:

  • http://ftp.gnome.org/pub/gnome/binaries/win64/gtk+/2.22/gtk+-bundle_2.22.1-20101229_win64.zip (OR
  • http://ftp.gnome.org/pub/gnome/binaries/win32/gtk+/2.22/gtk+-bundle_2.22.1-20101227_win32.zip if on Win32)

• If none of the above works, download package at this link

How to use Pakages

1. Golay UI
   • Golay_GUI()
   • 
2. TVDI UI
   • TVDI_GUI()
   • 

References

• http://r-pkgs.had.co.nz/
• Package MODIStsp: https://github.com/ropensci/MODIStsp
• https://rstudio.github.io/leaflet/
• https://github.com/rstudio/shiny-examples/tree/master/063-superzip-example