spi_week: Compute the Standardized Precipitation Index.
In ErickChacon/day2day: Functions for Day-to-Day Data Analysis

Description Usage Arguments Details Value Author(s)

spi_week computes the weekly spi index with gamlss models. It can also with work with precipitation series containing NA, 0 or only non-zero values.

1 2	spi_week(rain, tscale = 1, period = 365/7, package = "gamlss", plot = FALSE)

`rain`	Precipitation level.
`tscale`	Time-scale to compute the SPI in week units.
`period`	Period (e.g. 53 weeks) defined to model the seasonal effect.
`package`	Package to use. `gamlss` for backfitting and `bamlss` for baysian gamlss models.
`plot`	Logical value indicating if a plot should be draw or not.