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

Description Usage Arguments Details Author(s) References

Description

Generic methods for extracting information and plotting spei objects.

See print.spei

See print.spei

Usage

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

## S3 method for class 'spei'
summary(object, ...)

## S3 method for class 'spei'
plot(x, ttext = NULL, ...)

Arguments

x

an object of class spei.

...

additional parameters, not used at present.

object

an object of class spei.

ttext

text to use as part of the plot title

Details

This 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 unlikely case that NA or Inf values were produced, these are shown by circles.

See print.spei

See print.spei

Author(s)

Santiago Beguería

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.


sbegueria/SPEI documentation built on March 22, 2018, 3:42 p.m.