geopar: Parameters for the geo plot functions.

In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

Description

The geo functions rely on the parameters in options("geopar") for plotting. Every time geoplot is called a new set of geopar is made and the current erased. If you want to change the parameters in the background plot after you call geosubplot you have to save the current geopar before calling geosubplot. When reassigning geopar, the command options(geopar=list(...)) must be used.

When using geosubplot it is important to save these parameters before the subplot is plotted if one wants to make changes to the large plot afterwards.

Examples

## Not run: geoplot(type="l")
large.geopar <- geopar                          # Parameters saved.

pos <- list(lat=c(63,64),lon=c(-27,-24))    
geosubplot(geoplot(island, new=TRUE,type="l"),pos) # Plot subplot at pos.
geopolygon(island,col=3)                        # Fill with color.      
geotext(65,-18,"subplot",col=150)               # Text on subplot.
small.geopar <- geopar                          # Parameters for subplot saved.

geopar <- large.geopar                          # Make big plot active.
geopolygon(island,col=150)                      # Fill with color.
geotext(65,-18.5,"Big plot",csi=8,col=3)        # Text on big plot.

pos <- list(lat=c(63,64),lon=c(-15,-12))
geosubplot(geoplot(island,new=T,type="l"),pos)  # Another subplot drawn.
geopolygon(island,col=3)                        # Fill with color.
geotext(65,-18,"subplot # 2",col=150)           # Text on subplot #2.
small.geopar.2 <- geopar                        # Parameters for subplot saved.

# This must put in a script and sourced together to work like meant to here.
# If done in command line, assign() must be used for changing geopar.

## End(Not run)

geo documentation built on May 2, 2019, 5:22 p.m.