extract: Extract from Zoo
In hydroTSM: Time Series Management and Analysis for Hydrological Modelling

extract

R Documentation

Extract from Zoo

Description

Extracts from a zoo object all the values belonging to a given month, year or weather season.

Usage

extract(x, ...)

## Default S3 method:
extract(x, trgt, ...)
     
## S3 method for class 'zoo'
extract(x, trgt, ...)

Arguments

`x`	zoo object
`trgt`	numeric or character indicating the elements to extract from `x`. Valid values are: 1) integer(s) from 1 to 12: `trgt` is considered as month(s) (1=JAN, 2=FEB,...., 12=DEC), and all the values in `x` belonging to the month(s) specified by `trgt` will be extracted. 2) integer(s) > 12: `trgt` is considered as year(s), and all the values in `x` belonging to the year(s) specified by `trgt` will be extracted 3) character: `trgt` is considered as a weather season, and all the values in `x` belonging to the season specified by `trgt` will be extracted. Valid values are: -) `DJF` : December, January, February -) `MAM` : March, April, May -) `JJA` : June, July, August -) `SON` : September, October, November -) `DJFM`: December, January, February, March -) `AM` : April, May -) `JJAS`: June, July, August, September -) `ON` : October, November
`...`	further arguments passed to or from other methods

Value

a zoo object with the extracted values.

Author(s)

Mauricio Zambrano-Bigiarini, mzb.devel@gmail

Examples

### Loading temperature data ##
data(SanMartinoPPts)
x <- SanMartinoPPts

## Extracting all the values belonging to February (FEB=2)
extract(x, trgt=2)

## Extracting all the values belonging to February (FEB=2) and April (APR=4)
extract(x, trgt=c(2,4))

## Extracting all the values belonging to the year 1970
extract(x, trgt=1970)

## Extracting all the values belonging to the years 1970 and 1972
extract(x, trgt=c(1970,1972))

## Extracting all the values belonging to the autumn
extract(x, trgt="SON")

hydroTSM documentation built on Nov. 4, 2024, 5:07 p.m.