"""
blockm - Block average (x,y,z) data tables by mean, median, or mode estimation.
"""
import pandas as pd
from pygmt.clib import Session
from pygmt.helpers import (
GMTTempFile,
build_arg_string,
fmt_docstring,
kwargs_to_strings,
use_alias,
)
def _blockm(block_method, table, outfile, x, y, z, **kwargs):
r"""
Block average (x,y,z) data tables by mean, median, or mode estimation.
Reads arbitrarily located (x,y,z) triples [or optionally weighted
quadruples (x,y,z,w)] from a table and writes to the output a mean,
median, or mode (depending on ``block_method``) position and value for
every non-empty block in a grid region defined by the ``region`` and
``spacing`` parameters.
Parameters
----------
block_method : str
Name of the GMT module to call. Must be "blockmean", "blockmedian" or
"blockmode".
Returns
-------
output : pandas.DataFrame or None
Return type depends on whether the ``outfile`` parameter is set:
- :class:`pandas.DataFrame` table with (x, y, z) columns if ``outfile``
is not set
- None if ``outfile`` is set (filtered output will be stored in file
set by ``outfile``)
"""
with GMTTempFile(suffix=".csv") as tmpfile:
with Session() as lib:
# Choose how data will be passed into the module
table_context = lib.virtualfile_from_data(
check_kind="vector", data=table, x=x, y=y, z=z
)
# Run blockm* on data table
with table_context as infile:
if outfile is None:
outfile = tmpfile.name
arg_str = " ".join([infile, build_arg_string(kwargs), "->" + outfile])
lib.call_module(module=block_method, args=arg_str)
# Read temporary csv output to a pandas table
if outfile == tmpfile.name: # if user did not set outfile, return pd.DataFrame
try:
column_names = table.columns.to_list()
result = pd.read_csv(tmpfile.name, sep="\t", names=column_names)
except AttributeError: # 'str' object has no attribute 'columns'
result = pd.read_csv(tmpfile.name, sep="\t", header=None, comment=">")
elif outfile != tmpfile.name: # return None if outfile set, output in outfile
result = None
return result
[docs]@fmt_docstring
@use_alias(
I="spacing",
R="region",
V="verbose",
a="aspatial",
b="binary",
d="data",
e="find",
f="coltypes",
h="header",
i="incols",
o="outcols",
r="registration",
s="skiprows",
w="wrap",
)
@kwargs_to_strings(R="sequence", i="sequence_comma")
def blockmean(table=None, outfile=None, *, x=None, y=None, z=None, **kwargs):
r"""
Block average (x,y,z) data tables by mean estimation.
Reads arbitrarily located (x,y,z) triples [or optionally weighted
quadruples (x,y,z,w)] and writes to the output a mean position and value
for every non-empty block in a grid region defined by the ``region`` and
``spacing`` parameters.
Takes a matrix, xyz triplets, or a file name as input.
Must provide either ``table`` or ``x``, ``y``, and ``z``.
Full option list at :gmt-docs:`blockmean.html`
{aliases}
Parameters
----------
table : str or {table-like}
Pass in (x, y, z) or (longitude, latitude, elevation) values by
providing a file name to an ASCII data table, a 2D
{table-classes}.
x/y/z : 1d arrays
Arrays of x and y coordinates and values z of the data points.
{I}
{R}
outfile : str
The file name for the output ASCII file.
{V}
{a}
{b}
{d}
{e}
{i}
{f}
{h}
{o}
{r}
{s}
{w}
Returns
-------
output : pandas.DataFrame or None
Return type depends on whether the ``outfile`` parameter is set:
- :class:`pandas.DataFrame` table with (x, y, z) columns if ``outfile``
is not set.
- None if ``outfile`` is set (filtered output will be stored in file
set by ``outfile``).
"""
return _blockm(
block_method="blockmean", table=table, outfile=outfile, x=x, y=y, z=z, **kwargs
)
[docs]@fmt_docstring
@use_alias(
I="spacing",
R="region",
V="verbose",
a="aspatial",
b="binary",
d="data",
e="find",
f="coltypes",
h="header",
i="incols",
o="outcols",
r="registration",
s="skiprows",
w="wrap",
)
@kwargs_to_strings(R="sequence", i="sequence_comma")
def blockmode(table=None, outfile=None, *, x=None, y=None, z=None, **kwargs):
r"""
Block average (x,y,z) data tables by mode estimation.
Reads arbitrarily located (x,y,z) triples [or optionally weighted
quadruples (x,y,z,w)] and writes to the output a mode position and value
for every non-empty block in a grid region defined by the ``region`` and
``spacing`` parameters.
Takes a matrix, xyz triplets, or a file name as input.
Must provide either ``table`` or ``x``, ``y``, and ``z``.
Full option list at :gmt-docs:`blockmode.html`
{aliases}
Parameters
----------
table : str or {table-like}
Pass in (x, y, z) or (longitude, latitude, elevation) values by
providing a file name to an ASCII data table, a 2D
{table-classes}.
x/y/z : 1d arrays
Arrays of x and y coordinates and values z of the data points.
{I}
{R}
outfile : str
The file name for the output ASCII file.
{V}
{a}
{b}
{d}
{e}
{f}
{h}
{i}
{o}
{r}
{s}
{w}
Returns
-------
output : pandas.DataFrame or None
Return type depends on whether the ``outfile`` parameter is set:
- :class:`pandas.DataFrame` table with (x, y, z) columns if ``outfile``
is not set.
- None if ``outfile`` is set (filtered output will be stored in file
set by ``outfile``).
"""
return _blockm(
block_method="blockmode", table=table, outfile=outfile, x=x, y=y, z=z, **kwargs
)