#!/usr/bin/env python

# -*- coding: utf-8 -*-

"""

Plotting terminal based scatterplots

"""

import sys

import optparse

from .utils.helpers import (drange,

box_text,

printcolour,

colour_help)

from .utils.commandhelp import scatter

def get_scale(series, is_y=False, steps=20):

min_val = min(series)

max_val = max(series)

scaled_series = []

for x in drange(min_val, max_val, (max_val-min_val)/steps):

if x > 0 and scaled_series and max(scaled_series) < 0:

scaled_series.append(0.0)

scaled_series.append(x)

if is_y:

scaled_series.reverse()

return scaled_series

def plot_scatter(points,

size,

pch,

colour='white',

title='Plot1'):

"""

Form a complex number.

Arguments:

points -- iterable containing (x, y) coordinate pairs

size -- size of the plot

pch -- shape of the points (any character)

colour -- colour of the points

title -- title of the plot

"""

xs = [point[0] for point in points]

ys = [point[1] for point in points]

plotted = set()

if title:

print box_text(title, 2*len(get_scale(xs, False, size))+1)

print "-" * (2*len(get_scale(xs, False, size))+2)

for y in get_scale(ys, True, size):

print "|",

for x in get_scale(xs, False, size):

point = " "

for xp, yp in zip(xs, ys):

if xp <= x and yp >= y and (xp, yp) not in plotted:

point = pch

plotted.add((xp, yp))

if x==0 and y==0:

point = "o"

elif x==0:

point = "|"

elif y==0:

point = "-"

printcolour(point, True, colour)

print "|"

print "-"*(2*len(get_scale(xs, False, size))+2)

def main():

parser = optparse.OptionParser(usage=scatter['usage'])

parser.add_option('-f', '--file', help='a csv w/ x and y coordinates', default=None, dest='f')

parser.add_option('-t', '--title', help='title for the chart', default="", dest='t')

parser.add_option('-x', help='x coordinates', default=None, dest='x')

parser.add_option('-y', help='y coordinates', default=None, dest='y')

parser.add_option('-s', '--size',help='y coordinates', default=20, dest='size', type='int')

parser.add_option('-p', '--pch',help='shape of point', default="x", dest='pch')

parser.add_option('-c', '--colour', help='colour of the plot (%s)' % colour_help, default='default', dest='colour')

opts, args = parser.parse_args()

if opts.f is None and (opts.x is None or opts.y is None):

opts.f = sys.stdin.readlines()

if opts.f or (opts.x and opts.y):

plot_scatter(opts.f, opts.x, opts.y, opts.size, opts.pch, opts.colour, opts.t)

else:

print "nothing to plot!"

if __name__=="__main__":

main()