Solved

# Python plotting

Posted on 2013-01-10
Medium Priority
338 Views
Hi

Can anybody tell me why the following code won't work? I get a syntax error on

plt.figure()

This is the code:

import matplotlib.pyplot as plt
import math

def plotBinomial():
prob = input( 'Enter probability of success: ')
n = input( 'Enter the number of successes: ')
Nmax = input( 'Enter the maximum number of trials: ')

x = []
y = []

for N in range( n, Nmax + 1 ):
x.append( N )
y.append( probability( prob, n, N )

plt.figure()
plt.title( 'Varying N and probability p = ' + str( prob ) )
plt.xlabel( 'N' )
plt.ylabel( 'Probability' )
plt.grid( True )
plt.plot( x, y )
plt.show()
plt.close()

def probability( prob, n, N ):
nCr = math.factorial( N ) / ( math.factorial( n ) * math.factorial( N - n ) )
P = nCr * ( prob**n ) * ( 1 - prob )**( N - n )
return P
0
Question by:IssacJones
[X]
###### Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

• Help others & share knowledge
• Earn cash & points
• Learn & ask questions

LVL 17

Accepted Solution

gelonida earned 1200 total points
ID: 38762646
You forgot a closing parenthesis in the line before.

y.append( probability( prob, n, N )

should be
y.append( probability( prob, n, N ))

This is a rather classical issue with syntax checking.
The parser doesn't know whether you forgot the closing parenthesis or whether you wanted to write a multi-line statement.
0

Author Closing Comment

ID: 38762795
Excellent!
0

## Featured Post

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A set of related code is known to be a Module, it helps us to organize our code logically which is much easier for us to understand and use it. Module is an object with arbitrarily named attributes which can be used in binding and referencing. …
Introduction of Lists in Python: There are six built-in types of sequences. Lists and tuples are the most common one. In this article we will see how to use Lists in python and how we can utilize it while doing our own program. In general we can al…
Learn the basics of strings in Python: declaration, operations, indices, and slicing. Strings are declared with quotations; for example: s = "string": Strings are immutable.: Strings may be concatenated or multiplied using the addition and multiplic…
Learn the basics of lists in Python. Lists, as their name suggests, are a means for ordering and storing values. : Lists are declared using brackets; for example: t = [1, 2, 3]: Lists may contain a mix of data types; for example: t = ['string', 1, T…
###### Suggested Courses
Course of the Month12 days, 20 hours left to enroll

#### 777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.