"""
plot - Plot lines, polygons, and symbols in 2-D.
"""
from typing import Literal
from pygmt._typing import PathLike, TableLike
from pygmt.clib import Session
from pygmt.exceptions import GMTInvalidInput
from pygmt.helpers import (
build_arg_list,
data_kind,
fmt_docstring,
is_nonstr_iter,
kwargs_to_strings,
use_alias,
)
from pygmt.src._common import _data_geometry_is_point
@fmt_docstring
@use_alias(
A="straight_line",
B="frame",
C="cmap",
D="offset",
E="error_bar",
F="connection",
G="fill",
I="intensity",
J="projection",
L="close",
N="no_clip",
R="region",
S="style",
V="verbose",
W="pen",
Z="zvalue",
a="aspatial",
b="binary",
c="panel",
d="nodata",
e="find",
f="coltypes",
g="gap",
h="header",
i="incols",
l="label",
p="perspective",
t="transparency",
w="wrap",
)
@kwargs_to_strings(R="sequence", c="sequence_comma", i="sequence_comma", p="sequence")
def plot( # noqa: PLR0912
self,
data: PathLike | TableLike | None = None,
x=None,
y=None,
size=None,
symbol=None,
direction=None,
straight_line: bool | Literal["x", "y"] = False, # noqa: ARG001
**kwargs,
):
r"""
Plot lines, polygons, and symbols in 2-D.
Takes a matrix, (x,y) pairs, or a file name as input and plots lines,
polygons, or symbols at those locations on a map.
Must provide either ``data`` or ``x``/``y``.
If providing data through ``x``/``y``, ``fill`` can be a 1-D array that
will be mapped to a colormap.
If a symbol is selected and no symbol size given, then plot will
interpret the third column of the input data as symbol size. Symbols
whose size is <= 0 are skipped. If no symbols are specified then the
symbol code (see ``style`` below) must be present as last column in the
input. If ``style`` is not used, a line connecting the data points will
be drawn instead. To explicitly close polygons, use ``close``. Select a
fill with ``fill``. If ``fill`` is set, ``pen`` will control whether the
polygon outline is drawn or not. If a symbol is selected, ``fill`` and
``pen`` determine the fill and outline/no outline, respectively.
Full GMT docs at :gmt-docs:`plot.html`.
{aliases}
Parameters
----------
data
Pass in either a file name to an ASCII data table, a 2-D
{table-classes}.
Use parameter ``incols`` to choose which columns are x, y, fill, and
size, respectively.
x/y : float or 1-D arrays
The x and y coordinates, or arrays of x and y coordinates of the
data points
size : 1-D array
The size of the data points in units specified using ``style``.
Only valid if using ``x``/``y``.
symbol : 1-D array
The symbols of the data points. Only valid if using ``x``/``y``.
direction : list of two 1-D arrays
If plotting vectors (using ``style="V"`` or ``style="v"``), then
should be a list of two 1-D arrays with the vector directions. These
can be angle and length, azimuth and length, or x and y components,
depending on the style options chosen.
{projection}
{region}
straight_line
By default, line segments are drawn as straight lines in the Cartesian and polar
coordinate systems, and as great circle arcs (by resampling coarse input data
along such arcs) in the geographic coordinate system. The ``straight_line``
parameter can control the drawing of line segments. Valid values are:
- ``True``: Draw line segments as straight lines in geographic coordinate
systems.
- ``"x"``: Draw line segments by first along *x*, then along *y*.
- ``"y"``: Draw line segments by first along *y*, then along *x*.
Here, *x* and *y* have different meanings depending on the coordinate system:
- **Cartesian** coordinate system: *x* and *y* are the X- and Y-axes.
- **Polar** coordinate system: *x* and *y* are theta and radius.
- **Geographic** coordinate system: *x* and *y* are parallels and meridians.
.. attention::
There exits a bug in GMT<=6.5.0 that, in geographic coordinate systems, the
meaning of *x* and *y* is reversed, i.e., *x* means meridians and *y* means
parallels. The bug is fixed by upstream
`PR #8648 <https://github.com/GenericMappingTools/gmt/pull/8648>`__.
{frame}
{cmap}
offset : str
*dx*/*dy*.
Offset the plot symbol or line locations by the given amounts
*dx/dy* [Default is no offset]. If *dy* is not given it is set
equal to *dx*.
error_bar : bool or str
[**x**\|\ **y**\|\ **X**\|\ **Y**][**+a**\|\ **A**]\
[**+cl**\|\ **f**][**+n**][**+w**\ *cap*][**+p**\ *pen*].
Draw error bars. Full documentation is at
:gmt-docs:`plot.html#e`.
connection : str
[**c**\|\ **n**\|\ **p**][**a**\|\ **r**\|\ **s**\|\ **t**\|\ *refpoint*].
Alter the way points are connected (by specifying a *scheme*) and data are
grouped (by specifying a *method*). Append one of three line connection schemes:
- **c**: Draw continuous line segments for each group [Default].
- **n**: Draw networks of line segments between all points in each group.
- **p**: Draw line segments from a reference point reset for each group.
Optionally, append the one of four segmentation methods to define the group:
- **a**: Ignore all segment headers, i.e., let all points belong to a single
group, and set group the reference point to the very first point of the first
file.
- **r**: Segment headers are honored so each segment is a group; the group
reference point is reset after each record to the previous point (this method
is only available with the ``connection="p"`` scheme).
- **s**: Same as **r**, but the group reference point is reset to the first
point of each incoming segment [Default].
- **t**: Consider all data in each file to be a single separate group and reset
the group reference point to the first point of each group.
Instead of the codes **a**\|\ **r**\|\ **s**\|\ **t** you may append the
coordinates of a *refpoint* which will serve as a fixed external reference point
for all groups.
{fill}
*fill* can be a 1-D array, but it is only valid if using ``x``/``y``
and ``cmap=True`` is also required.
intensity : float, bool, or 1-D array
Provide an *intensity* value (nominally in the -1 to +1 range) to
modulate the fill color by simulating illumination. If using
``intensity=True``, we will instead read *intensity* from the first
data column after the symbol parameters (if given). *intensity* can
also be a 1-D array to set varying intensity for symbols, but it is
only valid for ``x``/``y`` pairs.
close : str
[**+b**\|\ **d**\|\ **D**][**+xl**\|\ **r**\|\ *x0*]\
[**+yl**\|\ **r**\|\ *y0*][**+p**\ *pen*].
Force closed polygons. Full documentation is at
:gmt-docs:`plot.html#l`.
no_clip : bool or str
[**c**\|\ **r**].
Do **not** clip symbols that fall outside the frame boundaries
[Default plots points whose coordinates are strictly inside the
frame boundaries only].
The parameter does not apply to lines and polygons which are always
clipped to the map region. For periodic (360-longitude) maps we
must plot all symbols twice in case they are clipped by the
repeating boundary. ``no_clip=True`` will turn off clipping and not
plot repeating symbols. Use ``no_clip="r"`` to turn off clipping
but retain the plotting of such repeating symbols, or use
``no_clip="c"`` to retain clipping but turn off plotting of
repeating symbols.
style : str
Plot symbols (including vectors, pie slices, fronts, decorated or
quoted lines).
{pen}
{verbose}
zvalue : str
*value*\|\ *file*.
Instead of specifying a symbol or polygon fill and outline color
via ``fill`` and ``pen``, give both a *value* via ``zvalue`` and a
color lookup table via ``cmap``. Alternatively, give the name of a
*file* with one z-value (read from the last column) for each
polygon in the input data. To apply it to the fill color, use
``fill="+z"``. To apply it to the pen color, append **+z** to
``pen``.
{aspatial}
{binary}
{panel}
{nodata}
{find}
{coltypes}
{gap}
{header}
{incols}
{label}
{perspective}
{transparency}
``transparency`` can also be a 1-D array to set varying
transparency for symbols, but this option is only valid if using
``x``/``y``.
{wrap}
"""
# TODO(GMT>6.5.0): Remove the note for the upstream bug of the "straight_line"
# parameter.
self._activate_figure()
kind = data_kind(data)
if kind == "empty": # Data is given via a series of vectors.
data = {"x": x, "y": y}
# Parameters for vector styles
if (
isinstance(kwargs.get("S"), str)
and len(kwargs["S"]) >= 1
and kwargs["S"][0] in "vV"
and is_nonstr_iter(direction)
):
data.update({"x2": direction[0], "y2": direction[1]})
# Fill
if is_nonstr_iter(kwargs.get("G")):
data["fill"] = kwargs.pop("G")
# Size
if is_nonstr_iter(size):
data["size"] = size
# Intensity and transparency
for flag, name in [("I", "intensity"), ("t", "transparency")]:
if is_nonstr_iter(kwargs.get(flag)):
data[name] = kwargs[flag]
kwargs[flag] = ""
# Symbol must be at the last column
if is_nonstr_iter(symbol):
if "S" not in kwargs:
kwargs["S"] = True
data["symbol"] = symbol
else:
if any(v is not None for v in (x, y)):
msg = "Too much data. Use either data or x/y/z."
raise GMTInvalidInput(msg)
for name, value in [
("direction", direction),
("fill", kwargs.get("G")),
("size", size),
("intensity", kwargs.get("I")),
("transparency", kwargs.get("t")),
("symbol", symbol),
]:
if is_nonstr_iter(value):
msg = f"'{name}' can't be a 1-D array if 'data' is used."
raise GMTInvalidInput(msg)
# Set the default style if data has a geometry of Point or MultiPoint
if kwargs.get("S") is None and _data_geometry_is_point(data, kind):
kwargs["S"] = "s0.2c"
with Session() as lib:
with lib.virtualfile_in(check_kind="vector", data=data) as vintbl:
lib.call_module(module="plot", args=build_arg_list(kwargs, infile=vintbl))