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chart.py
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chart.py
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# author: Igor Andreoni <igor.andreoni@gmail.com>
import numpy as np
import math
import matplotlib.pyplot as plt
from collections import OrderedDict
def makeChart(results, event="BNS merger",
filters_color_dict={'u': 'b', 'g': 'g', 'r': 'r',
'i': 'yellow', 'z': 'k', 'y': 'orange'},
exptimes_marker_list=["o", "s", "p", "h", "8"],
):
# Initialize the figure
fig = plt.figure(figsize=(20, 8))
ax = fig.add_subplot(111)
marker_size = 50
# Assign variables to the y labels, length of table
ylabels = list(results.keys())
ilen = len(ylabels)
# Markers piechart. First define the ratios
ratio = 1./6 # same for 6 filters
xy_list_pie = get_pie(ratio)
for i in range(len(ylabels)):
timeline = results[ylabels[i]]["cadence_hr"]
filters = results[ylabels[i]]["filters"]
# Iterate over combination of filters
for xy, f in zip(xy_list_pie, filters_color_dict.keys()):
# Iterate over individual filters
for t, filters_epoch in zip(timeline, filters):
if f in filters_epoch:
ax.plot(t, (i*0.5) + 0.5, marker=(xy),
ms=marker_size,
markerfacecolor=filters_color_dict[f],
markeredgecolor='k', linestyle='none', label=f)
# y axis labels
pos = np.arange(0.5, ilen*0.5+0.5, 0.5)
locsy, labelsy = plt.yticks(pos, ylabels)
plt.setp(labelsy, fontsize=16)
# Add a grid to guide the eye
ax.grid(which='both', color='grey', linestyle=':')
ax.set_xlabel(f"Hours from {event}", fontsize=30)
# plot edges based on median exptimes
plot_edges(results, ax, marker_size=60,
exptimes_marker_list=exptimes_marker_list)
# Legend
handles, labels = plt.gca().get_legend_handles_labels()
by_label = OrderedDict(zip(labels, handles))
# Organize number of rows
if len(by_label.values()) <= 8:
bbox_to_anchor = (0.5, 1.39)
else:
bbox_to_anchor = (0.5, 1.43)
ax.legend(by_label.values(), by_label.keys(), loc='upper center',
bbox_to_anchor=bbox_to_anchor, ncol=8, fancybox=True, shadow=False,
fontsize=20, framealpha=0.8, borderpad=1.5)
# Logscale
ax.set_xscale("log")
# Fix the y axis limits
ax.tick_params(labelsize=30, width=1, length=5)
ax.set_ylim(ymin=0.3, ymax=ilen*0.5+0.2)
ax.invert_yaxis()
# Fix the x axis limits
xlim = ax.get_xlim() # get existing x limits
ax.set_xlim(xlim)
# Secondary axis (days)
ax2 = ax.twiny() # instantiate a second axes that shares the same y-axis
xlim2 = [np.log10(xlim[0]), np.log10(xlim[1])]
ax2.set_xlim(xlim2)
x2ticks = [0.2, 1, 2]
ax2.set_xticks([np.log10(24*x) for x in x2ticks])
ax2.set_xticklabels(x2ticks)
ax2.tick_params(labelsize=30, width=1, length=5)
ax2.set_xlabel(f"Days from {event}", fontsize=30)
# If needed, plot an horizontal line
# ax.plot([xlim[0], xlim[1]],
# 2*[np.mean(np.arange(len(results))) - 0.25],
# color='grey')
# Adjust the plot
plt.subplots_adjust(left=0.2)
return fig, ax
def plot_edges(results, ax, marker_size=50,
exptimes_marker_list=["o", "s", "p", "h", "8"],
):
# Plot marker edges for exposure times
ylabels = list(results.keys())
# create a dictionary for the markers
exptimes_marker_dict = {}
# Check that there are enough markers for the exptimes
exptimes_all = set(np.concatenate([results[k]["exptimes_median"]
for k in results.keys()]))
if len(exptimes_marker_list) < len(set(exptimes_all)):
print("STOP! Add markers to your exptimes_marker_list, \n\
there are not enough")
return
for et, marker in zip(sorted(set(exptimes_all)), exptimes_marker_list):
exptimes_marker_dict[et] = marker
for i in range(len(ylabels)):
timeline = np.array(results[ylabels[i]]["cadence_hr"])
exptimes = np.array(results[ylabels[i]]["exptimes_median"])
# Plot the edges by iterating over epochs and exp. times
for t, exptime in zip(timeline, exptimes):
ax.plot(t, (i*0.5)+0.5,
marker=exptimes_marker_dict[exptime],
markerfacecolor='none',
markeredgecolor='k',
markeredgewidth=1,
markersize=marker_size,
label=f"{exptime}s")
def get_pie(ratio0):
# Disclaimer: code found at
# https://matplotlib.org/2.0.1/mpl_examples/api/scatter_piecharts.py
# calculate the points of the first pie marker;
# these are just the origin (0,0) + some points on a circle cos,sin
xy_list = []
r1 = ratio0
r2 = r1 + ratio0
r3 = r2 + ratio0
r4 = r3 + ratio0
r5 = r4 + ratio0
x = [0] + np.cos(np.linspace(0, 2*math.pi*r1, 10)).tolist()
y = [0] + np.sin(np.linspace(0, 2*math.pi*r1, 10)).tolist()
xy_list.append(list(zip(x, y)))
x = [0] + np.cos(np.linspace(2*math.pi*r1, 2*math.pi*r2, 10)).tolist()
y = [0] + np.sin(np.linspace(2*math.pi*r1, 2*math.pi*r2, 10)).tolist()
xy_list.append(list(zip(x, y)))
x = [0] + np.cos(np.linspace(2*math.pi*r2, 2*math.pi*r3, 10)).tolist()
y = [0] + np.sin(np.linspace(2*math.pi*r2, 2*math.pi*r3, 10)).tolist()
xy_list.append(list(zip(x, y)))
x = [0] + np.cos(np.linspace(2*math.pi*r3, 2*math.pi*r4, 10)).tolist()
y = [0] + np.sin(np.linspace(2*math.pi*r3, 2*math.pi*r4, 10)).tolist()
xy_list.append(list(zip(x, y)))
x = [0] + np.cos(np.linspace(2*math.pi*r4, 2*math.pi*r5, 10)).tolist()
y = [0] + np.sin(np.linspace(2*math.pi*r4, 2*math.pi*r5, 10)).tolist()
xy_list.append(list(zip(x, y)))
x = [0] + np.cos(np.linspace(2*math.pi*r5, 2*math.pi, 10)).tolist()
y = [0] + np.sin(np.linspace(2*math.pi*r5, 2*math.pi, 10)).tolist()
xy_list.append(list(zip(x, y)))
return xy_list