On 9/26/12 12:31 PM, Benjamin Root wrote:
On Wed, Sep 26, 2012 at 12:10 PM, Paul Tremblay
<paulhtremb...@gmail.com <mailto:paulhtremb...@gmail.com>> wrote:
Thanks. I know when doing 8/9 in python 2.x you get 0. With python
3 you get a decimal (Hooray, Python 3!).
I ran the script I submitted with python 3. Do I need to change
the defects and totals from integers to floats to make my chart
work universally?
P.
Here is my latest version of the Pareto chart. If the developers feel it
is worthy, then they can include it in the gallery. Otherwise, it will
have to remain in these threads, useful when, needing such a chart,
someone searches the web and ends up here.
import matplotlib.pyplot as plt
import numpy as np
# the data to plot
defects = [32.0, 22.0, 15.0, 5.0, 2.0]
labels = ['vertical', 'horizontal', 'behind', 'left area', 'other']
the_sum = sum(defects) # ie, 32 + 22 + 15 + 5 + 2
the_cumsum = np.cumsum(defects) # 32, 32 + 22, 32 + 22 + 15, 32 + 22 +
15 + 5, 32 + 22, + 15 + 5 + 2
percent = (np.divide(the_cumsum, the_sum)) * 100
ind = np.arange(len(defects)) # the x locations for the groups
width = .98 # with do of the bars, where a width of 1 indidcates no
space between bars
x = ind + .5 * width # find the middle of the bar
fig = plt.figure() # create a figure
ax1 = fig.add_subplot(111) # and a subplot
ax2 = ax1.twinx() # create a duplicate y axis
rects1 = ax1.bar(ind, defects, width=width) # draw the chart
line, = ax2.plot(x, percent) # draw the line
ax1.set_ylim(ymax=the_sum) # without these limits, graphs will not work
ax2.set_ylim(0, 100)
ax1.set_xticks(x) # set ticks for middle of bars
ax1.set_xticklabels(labels) # create the labels for the bars
ax1.set_ylabel('Defects') # create the left y axis label
ax2.set_ylabel('Percentage') # create the right y axis label
plt.show()
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