Hi I have a code to plot a histogram and I am trying to add a best fit line following this example
http://matplotlib.sourceforge.net/examples/pylab_examples/histogram_demo.html but run into this error Traceback (most recent call last): File "/home/Astro/count_Histogram.py", line 54, in <module> l = plt.plot(bins, y, 'r--', linewidth=1) File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 2467, in plot ret = ax.plot(*args, **kwargs) File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 3893, in plot for line in self._get_lines(*args, **kwargs): File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 322, in _grab_next_args for seg in self._plot_args(remaining, kwargs): File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 300, in _plot_args x, y = self._xy_from_xy(x, y) File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 240, in _xy_from_xy raise ValueError("x and y must have same first dimension") ValueError: x and y must have same first dimension My Code import matplotlib.pyplot as plt import math import numpy as np import mpl_toolkits.mplot3d.axes3d import matplotlib.mlab as mlab counts = [] F = '/home/Astro/outfiles/outmag21_5dr_38_68.txt' f = open(F) for line in f: if line != ' ': columns = line.split() count = columns[3] count = int(count) counts.append(count) C = np.array(counts, dtype=float) avg = sum(C)/len(C) diff = C-avg sigma = np.sqrt((1./len(C))*(diff**2)) bins = 20 plt.hist(C, bins, range=None, normed=False, weights=None, cumulative=False, bottom=None, histtype='bar', align='mid', orientation='vertical', rwidth=None, log = False, color=None, label=None) plt.title("") plt.text(25,20,'M < -21.5' '\n' 'N Halos 3877' '\n' 'Length Cell 38.68Mpc' '\n' 'N Cells 269' '\n' 'Avg Halo per Cell 14.35 ') plt.xlabel("Halos/Cell") plt.ylabel("Number Cells with N Halos") y = mlab.normpdf( bins, avg, sigma) print(len(y)) l = plt.plot(bins, y, 'r--', linewidth=1) plt.show() My first question is do x and y refer to the values in l = plt.plot(bins, y, 'r--', linewidth=1) which for my case are bins and y? if that is the case how can I get then to be the same first dimension? -- View this message in context: http://old.nabble.com/ValueError%3A-x-and-y-must-have-same-first-dimension-tp34218704p34218704.html Sent from the matplotlib - users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
