Learning R - Handling NetCDF files
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The document discusses handling NetCDF files in R. It explains that NetCDF is a common data format for storing scientific data in a gridded, self-documented format. It was created by UCAR to be portable. The RNetCDF package allows reading and writing NetCDF files in R. The document demonstrates how to obtain metadata on dimensions, variables, and attributes of NetCDF files in R and plot the variable data.
Learning R - Handling NetCDF files
- 1. Handling NetCDF files http://tinyurl.com/LearningR-NetCDF José Roberto Motta Garcia garcia.cptec@gmail.comDec-16 Leaning
- 2. José Roberto M. Garcia Dec-16Handling NetCDF files NetCDF file • Network Common Data Form • Stores data in matrix format (grid), e.g., climate data • Self-documented → metadata inside • Portable • Created by Unidata http://www.unidata.ucar.edu/software/netcdf/ (UCAR) • Handling NetCDF with R → RNetCDF package Visualizing NetCDF via sfw http://www.giss.nasa.gov/tools/panoply/ Visualizing NetCDF via R
- 3. José Roberto M. Garcia Dec-16Handling NetCDF files Reading NetCDF file # of dimensions, e.g., lon, lat, time, ... # of variables, e.g., lon, lat, time, temp, ... # of global attributes, e.g., title, source, ... # ID of the unlimited dimension or NA
- 4. José Roberto M. Garcia Dec-16Handling NetCDF files More on NetCDF info variable's attributes
- 5. José Roberto M. Garcia Dec-16Handling NetCDF files NetCDF variable content It's a monthly dataset, so there are 12 months!
- 6. José Roberto M. Garcia Dec-16Handling NetCDF files Reading variables and attributes
- 7. José Roberto M. Garcia Dec-16Handling NetCDF files Plotting data
- 8. José Roberto M. Garcia Dec-16Handling NetCDF files Creating attributes Defines global attributes Defines attributes of existing variables