plot.vpts {bioRad}R Documentation

Plot a time series of vertical profiles (vpts)

Description

Plot a time series of vertical profiles of class vpts.

Usage

## S3 method for class 'vpts'
plot(
  x,
  xlab = "time",
  ylab = "height [m]",
  quantity = "dens",
  log = TRUE,
  barbs = TRUE,
  barbs_height = 10,
  barbs_time = 20,
  barbs_dens_min = 5,
  zlim,
  legend_ticks,
  legend.ticks,
  main,
  barbs.h = 10,
  barbs.t = 20,
  barbs.dens = 5,
  ...
)

Arguments

x

A vp class object inheriting from class vpts.

xlab

A title for the x-axis.

ylab

A title for the y-axis.

quantity

Character string with the quantity to plot, one of 'dens','eta','dbz','DBZH' for density, reflectivity, reflectivity factor and total reflectivity factor, respectively.

log

Logical, whether to display quantity data on a logarithmic scale.

barbs

Logical, whether to overlay speed barbs.

barbs_height

Integer, number of barbs to plot in altitudinal dimension.

barbs_time

Integer, number of barbs to plot in temporal dimension.

barbs_dens_min

Numeric, lower threshold in aerial density of individuals for plotting speed barbs in individuals/km^3.

zlim

Optional numerical atomic vector of length 2, specifying the range of quantity values to plot.

legend_ticks

Numeric atomic vector specifying the ticks on the color bar.

legend.ticks

Deprecated argument, use legend_ticks instead.

main

A title for the plot.

barbs.h

Deprecated argument, use barbs_height instead.

barbs.t

Deprecated argument, use barbs_time instead.

barbs.dens

Deprecated argument, use barbs_dens_min instead.

...

Additional arguments to be passed to the low level image plotting function.

Details

Profile can be visualized in three related quantities, as specified by argument quantity:

"dens"

the aerial density of individuals. This quantity is dependent on the assumed radar cross section (RCS) in the x$attributes$how$rcs_bird attribute

"eta"

reflectivity. This quantity is independent of the value of the rcs_bird attribute

"dbz"

reflectivity factor. This quantity is independent of the value of the rcs_bird attribute, and corresponds to the dBZ scale commonly used in weather radar meteorology. Bioscatter by birds tends to occur at much higher reflectivity factors at S-band than at C-band

"DBZH"

total reflectivity factor. This quantity equals the reflectivity factor of all scatterers (biological and meteorological scattering combined)

In the speed barbs, each half flag represents 2.5 m/s, each full flag 5 m/s, each pennant (triangle) 25 m/s

Examples

# locate example file:
ts <- example_vpts
# plot density of individuals for the first 500 time steps, in the altitude
# layer 0-3000 m.
plot(ts[1:500], ylim = c(0, 3000))
# plot total reflectivity factor (rain, birds, insects together):
plot(ts[1:500], ylim = c(0, 3000), quantity = "DBZH")

[Package bioRad version 0.5.2 Index]