composite.field {clim.pact} | R Documentation

## Composite maps

### Description

Produce composites of maps based on station observations, weights, or years. For a station object, assign +/- 1 weights according to whether the values stored in `val` (monthly station objects) are greater than mean + sd or less than mean - sd.

### Usage

    composite.field(x,y,lsig.mask=TRUE,sig.lev=0.05,s=0.42,mon=NULL,
                          lty=1,col="black",lwd=1,main=NULL,sub=NULL)
    compositeField(x,y,lsig.mask=TRUE,sig.lev=0.05,s=0.42,mon=NULL,
                          lty=1,col="black",lwd=1,main=NULL,sub=NULL)

### Arguments

`x` | A field object.
`y` | A station object, a vector consisting of [-1,0,+1] or a vector consisting of the years (negative values are used for negative phase, eg. c(1991,1993,1998,-1961,-1963,-1994).
`lsig.mask` | FLAG: mask the regions not statistically significant.
`sig.lev` | Level of significance.
`s` | Threshold for defining whether `y` is high or low = s * sd(y).
`mon` | Month to analyse.
`lty` | Contour line type.
`col` | Contour line colour.
`lwd` | Contour line width.
`main` | Main title.
`sub` | subtitle.

### Value

A map object.

### Author(s)

R.E. Benestad

### Examples

    ## Not run:
    slp <- retrieve.nc("ncep_slp.nc")
    data(oslo.t2m)
    composite.field(slp,oslo.t2m)
    ## End(Not run)

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