station.symbol | R Documentation |
Adds a meteorological surface station annotation at the given coordinates. The annotation includes speed and direction of the wind, temperature, pressure, dewpoint ... to a given plot.
station.symbol( cx, cy, direction = 0, speed = NA, fill = rep(0, length(cx)), temp = NA, press = NA, dewpt = NA, circle = TRUE, cex = 1, spdcolor = "green", lwd = 2 )
cx |
x coordinate for location of the annotation. |
cy |
y coordinate for the annotation. |
direction |
Wind direction. |
speed |
Wind speed. |
fill |
Fill for visibility: 0 = clear skies, 1 = 25% obscured, 2 = 50% obscured, 3 = 75% obscured, 4 = no visibility |
temp |
Temperature value to plot symbol (must be a scalar). If NULL then no temperature value will be annotated. |
press |
Pressure value to plot symbol (must be a scalar). If NULL then no pressure value will be annotated. |
dewpt |
Dewpoint Temperature value to plot symbol (must be a scalar). If NULL then no dewpoint value will be annotated. |
circle |
If TRUE, will plot the usual station symbol with a circle at its base. |
cex |
Usual plotting parameter. |
spdcolor |
Glyph color |
lwd |
barb line width |
Doug Nychka, Eric Gilleland
plotWind
plot(0:1, 0:1, type="n") station.symbol(0.5, 0.5, direction=130, speed=30, fill=3, temp=31, press=987, dewpt=26, cex=5) title("Wind Barb")
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