Generic-methods-for-spei-objects: Generic methods for `spei` objects.

Description

Generic methods for extracting information and plotting spei objects.

See print.spei

Usage

# S3 method for spei
print(x, ...)
# S3 method for spei
summary(object, ...)
# S3 method for spei
plot(x, ...)
# S3 method for spei
summary(object, ...)
# S3 method for spei
plot(x, ...)

Arguments

x: an object of class spei.
...: additional parameters, not used at present.
object: an object of class spei.

Author

Santiago Beguería

Details

These functions allow extracting information and plotting spei objects. print yields the fitted values, i.e. a time series of SPEI or SPI values. summary reports the function call, the parameters of the PDF used, and the time series of SPEI or SPI values. plot produces a plot of the time series of SPEI or SPI values, with blue and red colors for positive and negative values, respectively. If a reference period was used in the function call it is shown by a shaded area. In the event that NA or Inf values were produced, these are shown by circles.

See print.spei

References

S.M. Vicente-Serrano, S. Beguería, J.I. López-Moreno. 2010. A Multi-scalar drought index sensitive to global warming: The Standardized Precipitation Evapotranspiration Index – SPEI. Journal of Climate 23: 1696, DOI: 10.1175/2009JCLI2909.1.

Examples

Run this code

# See examples of use in the help page of the spei() function.

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