plot.thornthwaite: Thornthwaite - Mather's quantile plot
In ClimClass: Climate Classification According to Several Indices

Description Usage Arguments Details Value Note Author(s) See Also Examples

'plot' method implementation for 12-month quantile climate charts from output of function thornthwaite (Thornthwaite and Mather's water balance).

## S3 method for class 'thornthwaite'
plot(x, save_dir = NULL, format = NULL,
  variables = c("Precipitation", "Et0", "Storage", "Prec. - Evap.", "Deficit",
  "Surplus"), title = TRUE, trace_grid = TRUE, st_name = NULL,
  u_y_scale_magn = 0.2, l_y_scale_magn = 0, leg_pos = "topleft", ...)

`x`	a list of quantile data frames of water balance variables to be plotted, as output of function `thornthwaite`.
`save_dir`	name of destination directory for graphs (if any). Default is `NULL`.
`format`	graphic format of graphs; default is NULL (charts are sent to console).
`variables`	character vector of variables to be plotted.
`title`	logic. If `TRUE` inserts titles in charts.
`trace_grid`	logic. If `TRUE` (default) adds a grid.
`st_name`	name to be included into graphs titles. If NULL (default), no title is written.
`u_y_scale_magn`	magnification of range above upper limit, to set upper y-scale limit; default is 0.
`l_y_scale_magn`	magnification of range below lower limit, to set lower y-scale limit; default is 0.1.
`leg_pos`	legend position. Default is "topleft". If NULL, no legend is added.
`...`	arguments to be passed to methods, such as graphical parameters (see `par`).

Default for plot variables is all those calculated by function thornthwaite: "Precipitation", "Et0", "Storage", "Prec. - Evap.", "Deficit", "Surplus". See function thornthwaite for details on variables.

If format is NULL (default), graphs are sent to the console. Otherwise, a file is produced and saved to the save_dir directory. Values allowed are: "png", "jpeg", "tiff", "bmp".

l_y_scale_magn and u_y_scale_magn are the magnification coefficients (lower and upper, respectively), for y scale. If rng is the range between maximum and minimum values in all sets of series within a plot, the lower limit for y scale will be (rng * l_y_scale_magn) below the lower value, and the upper limit will be (rng * u_y_scale_magn) above the upper value of series.

Allowed values for leg_pos are the same of x in function legend.

Most graphic parameters for functions plot and legend are accepted.

Charts of quantiles for water balance variables (12-month climatic values). They can be sent to the console or saved as graphic files.

A conflict is generated if parameters already used by the function are passed (e.g. x for legend: use leg_pos instead).

Emanuele Eccel

thornthwaite

data(Trent_climate)


# quantiles is the list ("thornthwaite" S3 object)of quantile tables generated 
# by function thornthwaite; 
# it is the second element of the output list, 
# which can be split into two separate lists (see function thornthwaite)
sta <- 1     # 1st station in the list of quantile tables
q_list=quantiles[[sta]]
class(q_list) <- "thornthwaite" ## q_list is coerced to a "thornthwaite" S3 object
plot(q_list, 
st_name=names(quantiles)[sta], variables=c("Precipitation",  "Et0"), 
leg_pos = "topleft", col=c(1:6,1), pch=c(1:6,16),  
lty=1, horiz=TRUE,  y.intersp=0.1)