#!/usr/bin/env python
##PACKAGES##
from __future__ import division
import sys
import warnings
import re
import itertools
import seaborn as sns
import pandas as pd
from matplotlib.lines import Line2D
import matplotlib.pyplot as plt
from .._shared.helpers import *
from ..tools.cluster import cluster
from ..tools.df2mat import df2mat
from ..tools.reduce import reduce as reduceD
from ..tools.normalize import normalize as normalizer
from .draw import draw
[docs]def plot(x, fmt=None, marker=None, markers=None, linestyle=None,
linestyles=None, color=None, colors=None, palette='hls', group=None,
labels=None, legend=None, title=None, elev=10, azim=-60, ndims=3,
normalize=False, n_clusters=None, save_path=None, animate=False,
duration=30, tail_duration=2, rotations=2, zoom=1, chemtrails=False,
precog=False, bullettime=False, frame_rate=50, explore=False,
show=True):
"""
Plots dimensionality reduced data and parses plot arguments
Parameters
----------
x : Numpy array, DataFrame or list of arrays/dfs
Data for the plot. The form should be samples (rows) by features (cols).
fmt : str or list of strings
A list of format strings. All matplotlib format strings are supported.
linestyle(s) : str or list of str
A list of line styles
marker(s) : str or list of str
A list of marker types
color(s) : str or list of str
A list of marker types
palette : str
A matplotlib or seaborn color palette
group : str/int/float or list
A list of group labels. Length must match the number of rows in your
dataset. If the data type is numerical, the values will be mapped to
rgb values in the specified palette. If the data type is strings,
the points will be labeled categorically. To label a subset of points,
use None (i.e. ['a', None, 'b','a']).
labels : list
A list of labels for each point. Must be dimensionality of data (x).
If no label is wanted for a particular point, input None.
legend : list
A list of string labels to be plotted in a legend (one for each list
item).
title : str
A title for the plot
ndims : int
An `int` representing the number of dims to plot in. Must be 1,2, or 3.
NOTE: Currently only works with static plots.
normalize : str or False
If set to 'across', the columns of the input data will be z-scored
across lists (default). If set to 'within', the columns will be
z-scored within each list that is passed. If set to 'row', each row of
the input data will be z-scored. If set to False, the input data will
be returned (default is False).
n_clusters : int
If n_clusters is passed, HyperTools will perform k-means clustering
with the k parameter set to n_clusters. The resulting clusters will
be plotted in different colors according to the color palette.
save_path str :
Path to save the image/movie. Must include the file extension in the
save path (i.e. save_path='/path/to/file/image.png'). NOTE: If saving
an animation, FFMPEG must be installed (this is a matplotlib req).
FFMPEG can be easily installed on a mac via homebrew brew install
ffmpeg or linux via apt-get apt-get install ffmpeg. If you don't
have homebrew (mac only), you can install it like this:
/usr/bin/ruby -e "$(curl -fsSL
https://raw.githubusercontent.com/Homebrew/install/master/install)".
animate : bool, 'parallel' or 'spin'
If True or 'parallel', plots the data as an animated trajectory, with
each dataset plotted simultaneously. If 'spin', all the data is plotted
at once but the camera spins around the plot (default: False).
duration (animation only) : float
Length of the animation in seconds (default: 30 seconds)
tail_duration (animation only) : float
Sets the length of the tail of the data (default: 2 seconds)
rotations (animation only) : float
Number of rotations around the box (default: 2)
zoom (animation only) : float
How far to zoom into the plot, positive numbers will zoom in (default: 0)
chemtrails (animation only) : bool
A low-opacity trail is left behind the trajectory (default: False).
precog (animation only) : bool
A low-opacity trail is plotted ahead of the trajectory (default: False).
bullettime (animation only) : bool
A low-opacity trail is plotted ahead and behind the trajectory
(default: False).
frame_rate (animation only) : int or float
Frame rate for animation (default: 50)
explore : bool
Displays user defined labels will appear on hover. If no labels are
passed, the point index and coordinate will be plotted. To use,
set explore=True. Note: Explore mode is currently only supported
for 3D static plots, and is an experimental feature (i.e it may not yet
work properly).
show : bool
If set to False, the figure will not be displayed, but the figure,
axis and data objects will still be returned (default: True).
Returns
----------
fig, ax, data, line_ani : matplotlib.figure.figure, matplotlib.axis.axes, numpy.array, matplotlib.animation.funcanimation
The plot function outputs a figure handle, axis handle, data, and line
animation object. The line animation object is None if animation=False.
"""
# turn data into common format - a list of arrays
x = format_data(x)
# catch all matplotlib kwargs here to pass on
mpl_kwargs = {}
# handle color (to be passed onto matplotlib)
if color is not None:
mpl_kwargs['color'] = color
if colors is not None:
mpl_kwargs['color'] = colors
warnings.warn('Both color and colors defined: color will be ignored \
in favor of colors.')
# handle linestyle (to be passed onto matplotlib)
if linestyle is not None:
mpl_kwargs['linestyle'] = linestyle
if linestyles is not None:
mpl_kwargs['linestyle'] = linestyles
warnings.warn('Both linestyle and linestyles defined: linestyle \
will be ignored in favor of linestyles.')
# handle marker (to be passed onto matplotlib)
if marker is not None:
mpl_kwargs['marker'] = marker
if markers is not None:
mpl_kwargs['marker'] = markers
warnings.warn('Both marker and markers defined: marker will be \
ignored in favor of markers.')
# handle legend
if legend is not None:
mpl_kwargs['label'] = legend
# normalize
x = normalizer(x, normalize=normalize, internal=True)
# reduce data
if x[0].shape[1]>3:
x = reduceD(x, ndims, internal=True)
# find cluster and reshape if n_clusters
if n_clusters is not None:
cluster_labels = cluster(x, n_clusters=n_clusters, ndims=ndims)
x = reshape_data(x, cluster_labels)
if group:
warnings.warn('n_clusters overrides group, ignoring group.')
# group data if there is a grouping var
if group is not None:
if color is not None:
warnings.warn("Using group, color keyword will be ignored.")
# if list of lists, unpack
if any(isinstance(el, list) for el in group):
group = list(itertools.chain(*group))
# if all of the elements are numbers, map them to colors
if all(isinstance(el, int) or isinstance(el, float) for el in group):
group = vals2bins(group)
elif all(isinstance(el, str) for el in group):
group = group_by_category(group)
# reshape the data according to group
x = reshape_data(x, group)
# interpolate lines if they are grouped
if is_line(fmt):
x = patch_lines(x)
# interpolate if its a line plot
if fmt is None or type(fmt) is str:
if is_line(fmt):
if x[0].shape[0] > 1:
x = interp_array_list(x, interp_val=frame_rate*duration/(x[0].shape[0] - 1))
elif type(fmt) is list:
for idx, xi in enumerate(x):
if is_line(fmt[idx]):
if xi.shape[0] > 1:
x[idx] = interp_array_list(xi, interp_val=frame_rate*duration/(xi.shape[0] - 1))
# handle explore flag
if explore:
assert x[0].shape[1] is 3, "Explore mode is currently only supported for 3D plots."
mpl_kwargs['picker']=True
# center
x = center(x)
# scale
x = scale(x)
# handle palette with seaborn
sns.set_palette(palette=palette, n_colors=len(x))
sns.set_style(style='whitegrid')
# turn kwargs into a list
kwargs_list = parse_kwargs(x, mpl_kwargs)
# handle format strings
if fmt is not None:
if type(fmt) is not list:
fmt = [fmt for i in x]
# draw the plot
fig, ax, data, line_ani = draw(x, fmt=fmt,
kwargs_list=kwargs_list,
labels=labels,
legend=legend,
title=title,
animate=animate,
duration=duration,
tail_duration=tail_duration,
rotations=rotations,
zoom=zoom,
chemtrails=chemtrails,
precog=precog,
bullettime=bullettime,
frame_rate=frame_rate,
elev=elev,
azim=azim,
explore=explore)
# tighten layout
plt.tight_layout()
# save
if save_path is not None:
if animate:
Writer = animation.writers['ffmpeg']
writer = Writer(fps=frame_rate, bitrate=1800)
line_ani.save(save_path, writer=writer)
else:
plt.savefig(save_path)
# show the plot
if show:
plt.show()
return fig, ax, data, line_ani