python - Plotting color changing with yaxis value -


i trying plot color changing line graph. when trying read file , plot same graph getting following error. please suggest changes made color changing graphs , markers @ same time.

input file: 

a_001,12:00,65452,abcd a_002,13:00,24562,cdfa a_003,13:30,2232351,ggadg c_234,13:00,46526,fwfd d_423,14:00,97669,gage

col[1] x axis , col[2] y axis values.

program:

# ma masked array import csv import datetime dt numpy import logical_or, arange, sin, pi numpy import ma matplotlib.pyplot import  plot, show   x,y = [],[] csv_reader = csv.reader(open('input.csv')) line in csv_reader:     x.append(int(line[2]))     y.append(dt.datetime.strptime(line[1],'%h:%m'))  upper = 30000 lower = 10000  supper = ma.masked_where(y < upper, y) slower = ma.masked_where(y > lower, y) smiddle = ma.masked_where(logical_or(y<lower, y>upper), y)  plot(x, slower, 'g', x, smiddle, 'b', x, supper, 'r', 'o-') show()

error

traceback (most recent call last):   file "map_line_color.py", line 22, in <module>     plot(x, slower, 'g', x, smiddle, 'b', x, supper, 'r')   file "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 2987, in plot     ret = ax.plot(*args, **kwargs)   file "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 4137, in plot     line in self._get_lines(*args, **kwargs):   file "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 326, in _grab_next_args     seg in self._plot_args(remaining[:isplit], kwargs):   file "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 295, in _plot_args     x, y = self._xy_from_xy(x, y)   file "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 214, in _xy_from_xy     = self.axes.yaxis.update_units(y)   file "/usr/lib/pymodules/python2.7/matplotlib/axis.py", line 1336, in update_units     converter = munits.registry.get_converter(data)   file "/usr/lib/pymodules/python2.7/matplotlib/units.py", line 137, in get_converter     xravel = x.ravel()   file "/usr/lib/python2.7/dist-packages/numpy/ma/core.py", line 4025, in ravel     r._mask = ndarray.ravel(self._mask).reshape(r.shape) valueerror: total size of new array must unchanged

there several issues in code.

  1. you mixed xand y.
  2. you need convert yinto numpy array.
  3. you had issues in plot() regarding formats of lines.

this whole code:

import csv import datetime dt numpy import logical_or, arange, sin, pi numpy import array, ma matplotlib.pyplot import  plot, show   x,y = [],[] csv_reader = csv.reader(open('input.csv')) line in csv_reader:     y.append(int(line[2]))     x.append(dt.datetime.strptime(line[1],'%h:%m'))  y = array(y)   upper = 30000 lower = 10000  supper = ma.masked_where(y < upper, y) slower = ma.masked_where(y > lower, y) smiddle = ma.masked_where(logical_or(y<lower, y>upper), y)  plot(x, slower, x, smiddle, x, supper) show()

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