README.md

In adamdsmith/pdsi: Retrieve, plot, and map Palmer Drought Severity Index data

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Installing pdsi

The pdsi package requires you to have R (>= 3.3) installed on your computer as well as Rtools. Both will require administrative priveleges but the installation of packages after this initial install will not.

With R and Rtools installed, it's simple to install and load the pdsi package to access its functionality.

# If devtools package is not installed
install.packages("devtools", dependencies = TRUE)

# Now install and load pdsi
devtools::install_github("adamdsmith/pdsi")
library("pdsi")

The pdsi package

The primary purpose of the package is to generate an interactive plot of monthly Palmer Drought Severity Index values for a given location, provided as a lat/lon pair or an address.

Using an address is probably easier, but subject to query limits from the Google API.

# Okefenokee NWR
pdsi_plot(address = "okefenokee nwr")

Using latitude and longitude, you can avoid API issues...

# Red River NWR
pdsi_plot(32.44757, -93.671768, fill = "BrBG", halo = FALSE)

There are a few display options you can choose among. See the help file ?pdsi_plot for a description.

adamdsmith/pdsi documentation built on May 28, 2019, 5:39 a.m.