| PlotEquiMap {s2dv} | R Documentation |
Maps A Two-Dimensional Variable On A Cylindrical Equidistant Projection
Description
Map longitude-latitude array (on a regular rectangular or gaussian grid) on a cylindrical equidistant latitude and longitude projection with coloured grid cells. Only the region for which data has been provided is displayed. A colour bar (legend) can be plotted and adjusted. It is possible to draw superimposed arrows, dots, symbols, contour lines and boxes. A number of options is provided to adjust the position, size and colour of the components. Some parameters are provided to add and adjust the masks that include continents, oceans, and lakes. This plot function is compatible with figure layouts if colour bar is disabled.
Usage
PlotEquiMap(
var,
lon,
lat,
varu = NULL,
varv = NULL,
toptitle = NULL,
sizetit = NULL,
units = NULL,
brks = NULL,
cols = NULL,
bar_limits = NULL,
triangle_ends = NULL,
col_inf = NULL,
col_sup = NULL,
colNA = NULL,
color_fun = clim.palette(),
square = TRUE,
filled.continents = NULL,
filled.oceans = FALSE,
country.borders = FALSE,
coast_color = NULL,
coast_width = 1,
lake_color = NULL,
shapefile = NULL,
shapefile_color = NULL,
shapefile_lwd = 1,
contours = NULL,
brks2 = NULL,
contour_lwd = 0.5,
contour_color = "black",
contour_lty = 1,
contour_draw_label = TRUE,
contour_label_scale = 1,
dots = NULL,
dot_symbol = 4,
dot_size = 1,
arr_subsamp = floor(length(lon)/30),
arr_scale = 1,
arr_ref_len = 15,
arr_units = "m/s",
arr_scale_shaft = 1,
arr_scale_shaft_angle = 1,
axelab = TRUE,
labW = FALSE,
lab_dist_x = NULL,
lab_dist_y = NULL,
degree_sym = FALSE,
intylat = 20,
intxlon = 20,
xlonshft = 0,
ylatshft = 0,
xlabels = NULL,
ylabels = NULL,
axes_tick_scale = 1,
axes_label_scale = 1,
drawleg = TRUE,
subsampleg = NULL,
bar_extra_labels = NULL,
draw_bar_ticks = TRUE,
draw_separators = FALSE,
triangle_ends_scale = 1,
bar_label_digits = 4,
bar_label_scale = 1,
units_scale = 1,
bar_tick_scale = 1,
bar_extra_margin = rep(0, 4),
boxlim = NULL,
boxcol = "purple2",
boxlwd = 5,
margin_scale = rep(1, 4),
title_scale = 1,
numbfig = NULL,
fileout = NULL,
width = 8,
height = 5,
size_units = "in",
res = 100,
...
)
Arguments
var |
Array with the values at each cell of a grid on a regular rectangular or gaussian grid. The array is expected to have two dimensions: c(latitude, longitude). Longitudes can be in ascending or descending order and latitudes in any order. It can contain NA values (coloured with 'colNA'). Arrays with dimensions c(longitude, latitude) will also be accepted but 'lon' and 'lat' will be used to disambiguate so this alternative is not appropriate for square arrays. It is allowed that the positions of the longitudinal and latitudinal coordinate dimensions are interchanged. |
lon |
Numeric vector of longitude locations of the cell centers of the
grid of 'var', in ascending or descending order (same as 'var'). Expected
to be regularly spaced, within either of the ranges [-180, 180] or
[0, 360]. Data for two adjacent regions split by the limits of the
longitude range can also be provided, e.g. |
lat |
Numeric vector of latitude locations of the cell centers of the grid of 'var', in any order (same as 'var'). Expected to be from a regular rectangular or gaussian grid, within the range [-90, 90]. |
varu |
Array of the zonal component of wind/current/other field with the same dimensions as 'var'. It is allowed that the positions of the longitudinal and latitudinal coordinate dimensions are interchanged. |
varv |
Array of the meridional component of wind/current/other field with the same dimensions as 'var'. It is allowed that the positions of the longitudinal and latitudinal coordinate dimensions are interchanged. |
toptitle |
Top title of the figure, scalable with parameter 'title_scale'. |
sizetit |
Scale factor for the figure top title provided in parameter 'toptitle'. Deprecated. Use 'title_scale' instead. |
units |
Title at the top of the colour bar, most commonly the units of the variable provided in parameter 'var'. |
brks, cols, bar_limits, triangle_ends |
Usually only providing 'brks' is
enough to generate the desired colour bar. These parameters allow to
define n breaks that define n - 1 intervals to classify each of the values
in 'var'. The corresponding grid cell of a given value in 'var' will be
coloured in function of the interval it belongs to. These parameters are
sent to |
col_inf, col_sup, colNA |
Colour identifiers to colour the values in 'var' that go beyond the extremes of the colour bar and to colour NA values, respectively. 'colNA' takes attr(cols, 'na_color') if available by default, where cols is the parameter 'cols' if provided or the vector of colors returned by 'color_fun'. If not available, it takes 'pink' by default. 'col_inf' and 'col_sup' will take the value of 'colNA' if not specified. See ?ColorBar for a full explanation on 'col_inf' and 'col_sup'. |
color_fun, subsampleg, bar_extra_labels, draw_bar_ticks |
Set of parameters to control the visual aspect of the drawn colour bar (1/3). See ?ColorBar for a full explanation. |
square |
Logical value to choose either to draw a coloured square for each grid cell in 'var' (TRUE; default) or to draw contour lines and fill the spaces in between with colours (FALSE). In the latter case, 'filled.continents' will take the value FALSE if not specified. |
filled.continents |
Colour to fill in drawn projected continents. Takes the value gray(0.5) by default or, if 'square = FALSE', takes the value FALSE. If set to FALSE, continents are not filled in. |
filled.oceans |
A logical value or the color name to fill in drawn projected oceans. The default value is FALSE. If it is TRUE, the default colour is "light blue". |
country.borders |
A logical value indicating if the country borders should be plotted (TRUE) or not (FALSE). It only works when 'filled.continents' is FALSE. The default value is FALSE. |
coast_color |
Colour of the coast line of the drawn projected continents. Takes the value gray(0.5) by default. |
coast_width |
Line width of the coast line of the drawn projected continents. Takes the value 1 by default. |
lake_color |
Colour of the lake or other water body inside continents. The default value is NULL. |
shapefile |
A character string of the path to a .rds file or a list object containinig shape file data. If it is a .rds file, it should contain a list. The list should contains 'x' and 'y' at least, which indicate the location of the shape. The default value is NULL. |
shapefile_color |
Line color of the shapefile. |
shapefile_lwd |
Line width of the shapefile. The default value is 1. |
contours |
Array of same dimensions as 'var' to be added to the plot and displayed with contours. Parameter 'brks2' is required to define the magnitude breaks for each contour curve. Disregarded if 'square = FALSE'. It is allowed that the positions of the longitudinal and latitudinal coordinate dimensions are interchanged. |
brks2 |
Vector of magnitude breaks where to draw contour curves for the array provided in 'contours' or if 'square = FALSE'. |
contour_lwd |
Line width of the contour curves provided via 'contours' and 'brks2', or if 'square = FALSE'. |
contour_color |
Line color of the contour curves provided via 'contours' and 'brks2', or if 'square = FALSE'. |
contour_lty |
Line type of the contour curves. Takes 1 (solid) by default. See help on 'lty' in par() for other accepted values. |
contour_draw_label |
A logical value indicating whether to draw the contour labels or not. The default value is TRUE. |
contour_label_scale |
Scale factor for the superimposed labels when drawing contour levels. |
dots |
Array of same dimensions as 'var' or with dimensions c(n, dim(var)), where n is the number of dot/symbol layers to add to the plot. A value of TRUE at a grid cell will draw a dot/symbol on the corresponding square of the plot. By default all layers provided in 'dots' are plotted with dots, but a symbol can be specified for each of the layers via the parameter 'dot_symbol'. It is allowed that the positions of the longitudinal and latitudinal coordinate dimensions are interchanged. |
dot_symbol |
Single character/number or vector of characters/numbers that correspond to each of the symbol layers specified in parameter 'dots'. If a single value is specified, it will be applied to all the layers in 'dots'. Takes 15 (centered square) by default. See 'pch' in par() for additional accepted options. |
dot_size |
Scale factor for the dots/symbols to be plotted, specified in 'dots'. If a single value is specified, it will be applied to all layers in 'dots'. Takes 1 by default. |
arr_subsamp |
Subsampling factor to select a subset of arrows in 'varu' and 'varv' to be drawn. Only one out of arr_subsamp arrows will be drawn. Takes 1 by default. |
arr_scale |
Scale factor for drawn arrows from 'varu' and 'varv'. Takes 1 by default. |
arr_ref_len |
Length of the refence arrow to be drawn as legend at the bottom of the figure (in same units as 'varu' and 'varv', only affects the legend for the wind or variable in these arrays). Defaults to 15. |
arr_units |
Units of 'varu' and 'varv', to be drawn in the legend. Takes 'm/s' by default. |
arr_scale_shaft |
Parameter for the scale of the shaft of the arrows (which also depend on the number of figures and the arr_scale parameter). Defaults to 1. |
arr_scale_shaft_angle |
Parameter for the scale of the angle of the shaft of the arrows (which also depend on the number of figure and the arr_scale parameter). Defaults to 1. |
axelab |
Whether to draw longitude and latitude axes or not. TRUE by default. |
labW |
Whether to label the longitude axis with a 'W' instead of minus for negative values. Defaults to FALSE. |
lab_dist_x |
A numeric of the distance of the longitude labels to the box borders. The default value is NULL and is automatically adjusted by the function. |
lab_dist_y |
A numeric of the distance of the latitude labels to the box borders. The default value is NULL and is automatically adjusted by the function. |
degree_sym |
A logical indicating whether to include degree symbol (30° N) or not (30N; default). |
intylat |
Interval between latitude ticks on y-axis, in degrees. Defaults to 20. |
intxlon |
Interval between latitude ticks on x-axis, in degrees. Defaults to 20. |
xlonshft |
A numeric of the degrees to shift the latitude ticks. The default value is 0. |
ylatshft |
A numeric of the degrees to shift the longitude ticks. The default value is 0. |
xlabels |
A vector of character string of the custumized x-axis labels. The values should correspond to each tick, which is decided by the longitude and parameter 'intxlon'. The default value is NULL and the labels will be automatically generated. |
ylabels |
A vector of character string of the custumized y-axis labels. The values should correspond to each tick, which is decided by the latitude and parameter 'intylat'. The default value is NULL and the labels will be automatically generated. |
axes_tick_scale |
Scale factor for the tick lines along the longitude and latitude axes. |
axes_label_scale |
Scale factor for the labels along the longitude and latitude axes. |
drawleg |
Whether to plot a color bar (legend, key) or not. Defaults to TRUE. It is not possible to plot the colour bar if 'add = TRUE'. Use ColorBar() and the return values of PlotEquiMap() instead. |
draw_separators, triangle_ends_scale, bar_label_digits |
Set of parameters to control the visual aspect of the drawn colour bar (2/3). See ?ColorBar for a full explanation. |
bar_label_scale, units_scale, bar_tick_scale, bar_extra_margin |
Set of parameters to control the visual aspect of the drawn colour bar (3/3). See ?ColorBar for a full explanation. |
boxlim |
Limits of a box to be added to the plot, in degrees: c(x1, y1, x2, y2). A list with multiple box specifications can also be provided. |
boxcol |
Colour of the box lines. A vector with a colour for each of the boxes is also accepted. Defaults to 'purple2'. |
boxlwd |
Line width of the box lines. A vector with a line width for each of the boxes is also accepted. Defaults to 5. |
margin_scale |
Scale factor for the margins around the map plot, with the format c(y1, x1, y2, x2). Defaults to rep(1, 4). If drawleg = TRUE, then margin_scale[1] is subtracted 1 unit. |
title_scale |
Scale factor for the figure top title. Defaults to 1. |
numbfig |
Number of figures in the layout the plot will be put into. A higher numbfig will result in narrower margins and smaller labels, axe labels, ticks, thinner lines, ... Defaults to 1. |
fileout |
File where to save the plot. If not specified (default) a graphics device will pop up. Extensions allowed: eps/ps, jpeg, png, pdf, bmp and tiff. |
width |
File width, in the units specified in the parameter size_units (inches by default). Takes 8 by default. |
height |
File height, in the units specified in the parameter size_units (inches by default). Takes 5 by default. |
size_units |
Units of the size of the device (file or window) to plot in. Inches ('in') by default. See ?Devices and the creator function of the corresponding device. |
res |
Resolution of the device (file or window) to plot in. See ?Devices and the creator function of the corresponding device. |
... |
Arguments to be passed to the method. Only accepts the following
graphical parameters: |
Value
brks |
Breaks used for colouring the map (and legend if drawleg = TRUE). |
cols |
Colours used for colouring the map (and legend if drawleg = TRUE). Always of length length(brks) - 1. |
col_inf |
Colour used to draw the lower triangle end in the colour bar (NULL if not drawn at all). |
col_sup |
Colour used to draw the upper triangle end in the colour bar (NULL if not drawn at all). |
Examples
# See examples on Load() to understand the first lines in this example
## Not run:
data_path <- system.file('sample_data', package = 's2dv')
expA <- list(name = 'experiment', path = file.path(data_path,
'model/$EXP_NAME$/$STORE_FREQ$_mean/$VAR_NAME$_3hourly',
'$VAR_NAME$_$START_DATE$.nc'))
obsX <- list(name = 'observation', path = file.path(data_path,
'$OBS_NAME$/$STORE_FREQ$_mean/$VAR_NAME$',
'$VAR_NAME$_$YEAR$$MONTH$.nc'))
# Now we are ready to use Load().
startDates <- c('19851101', '19901101', '19951101', '20001101', '20051101')
sampleData <- Load('tos', list(expA), list(obsX), startDates,
leadtimemin = 1, leadtimemax = 4, output = 'lonlat',
latmin = 27, latmax = 48, lonmin = -12, lonmax = 40)
## End(Not run)
PlotEquiMap(sampleData$mod[1, 1, 1, 1, , ], sampleData$lon, sampleData$lat,
toptitle = 'Predicted sea surface temperature for Nov 1960 from 1st Nov',
title_scale = 0.5)