126 lines
No EOL
4.5 KiB
Python
126 lines
No EOL
4.5 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#
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# The MIT License (MIT)
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#
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# Copyright (c) 2014 Ian Horn <horn.imh@gmail.com> and
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# Danilo J. S. Bellini <danilo.bellini@gmail.com>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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from __future__ import print_function, division
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import math, random, sys
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from operator import itemgetter
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# Python 2.x and 3.x compatibility
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if sys.version_info.major == 2:
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range = xrange
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from future_builtins import map, zip
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CHAR_LOOKUP_SYMBOLS = [(0, ' '), # Should be sorted
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(1, '.'),
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(2, ':'),
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#(3, '!'),
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(4, '|'),
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#(8, '+'),
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(float("inf"), '#')]
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def charlookup(num_chars):
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""" Character for the given amount of elements in the bin """
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return next(ch for num, ch in CHAR_LOOKUP_SYMBOLS if num_chars <= num)
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def bin_generator(data, bin_ends):
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""" Yields a list for each bin """
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max_idx_end = len(bin_ends) - 1
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iends = enumerate(bin_ends)
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idx_end, value_end = next(iends)
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bin_data = []
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for el in sorted(data):
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while el >= value_end and idx_end != max_idx_end:
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yield bin_data
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bin_data = []
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idx_end, value_end = next(iends)
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bin_data.append(el)
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# Finish
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for unused in iends:
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yield bin_data
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bin_data = []
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yield bin_data
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def enumerated_reversed(seq):
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""" A version of reversed(enumerate(seq)) that actually works """
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return zip(range(len(seq) - 1, -1, -1), reversed(seq))
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def plot(y_vals, x_vals=None, num_x_chars=70, num_y_chars=15):
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"""
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Plots the values given by y_vals. The x_vals values are the y indexes, by
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default, unless explicitly given. Pairs (x, y) are matched by the x_vals
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and y_vals indexes, so these must have the same length.
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The num_x_chars and num_y_chars inputs are respectively the width and
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height for the output plot to be printed, given in characters.
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"""
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y_vals = list(y_vals)
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x_vals = list(x_vals) if x_vals else list(range(len(y_vals)))
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if len(x_vals) != len(y_vals):
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raise ValueError("x_vals and y_vals must have the same length")
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ymin = min(y_vals)
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ymax = max(y_vals)
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xmin = min(x_vals)
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xmax = max(x_vals)
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xbinwidth = (xmax - xmin) / num_x_chars
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y_bin_width = (ymax - ymin) / num_y_chars
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x_bin_ends = [(xmin + (i+1) * xbinwidth, 0) for i in range(num_x_chars)]
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y_bin_ends = [ymin + (i+1) * y_bin_width for i in range(num_y_chars)]
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columns_pairs = bin_generator(zip(x_vals, y_vals), x_bin_ends)
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yloop = lambda *args: [charlookup(len(el)) for el in bin_generator(*args)]
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ygetter = lambda iterable: map(itemgetter(1), iterable)
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columns = (yloop(ygetter(pairs), y_bin_ends) for pairs in columns_pairs)
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rows = list(zip(*columns))
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for idx, row in enumerated_reversed(rows):
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y_bin_mid = y_bin_ends[idx] - y_bin_width * 0.5
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print("{:10.4f} {}".format(y_bin_mid, "".join(row)))
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if __name__ == '__main__':
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# Some examples
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ys = [math.cos(x/5.0) for x in range(180)]
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num_x_chars = min(70, len(ys))
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plot(ys, num_x_chars=num_x_chars, num_y_chars=15)
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xs = [50.0*random.random() for x in range(180)]
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ys = [math.cos(x/5.0) for x in xs]
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num_x_chars = min(70, len(ys))
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plot(ys, x_vals=xs, num_x_chars=num_x_chars, num_y_chars=15)
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k = 20
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ys = [random.gauss(0, 0.5) + math.cos(x/5.0/k) for x in range(180*k)]
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num_x_chars = min(160, len(ys))
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plot(ys, num_x_chars=num_x_chars, num_y_chars=25) |