The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.
One of a set of tools we're offering as a way of saying thank you for being a part of the community.
Solved
plotting in python using binomial
Posted on 2011-09-02
Hi
I am trying to learn python and graphing. Could anybody help me with the following?
I want to plot a graph of probabilities using the Binomial which I will write as B(N,n,p); where N is the total number of events, n is the number of successes and p is the probability of a success.
What I want to do is plot the probability of the n events occurring for varying N but fixed n and p.
For example, if n = 20 and p = 0.1, I would like to work out the probability of P(n=20, p=0.1) for N = 20, ... , 100.
Could someone give me the Python code which would allow me to do this?
Thanks in advance
Issac
I am trying to learn python and graphing. Could anybody help me with the following?
I want to plot a graph of probabilities using the Binomial which I will write as B(N,n,p); where N is the total number of events, n is the number of successes and p is the probability of a success.
What I want to do is plot the probability of the n events occurring for varying N but fixed n and p.
For example, if n = 20 and p = 0.1, I would like to work out the probability of P(n=20, p=0.1) for N = 20, ... , 100.
Could someone give me the Python code which would allow me to do this?
Thanks in advance
Issac
[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
-
3
-
2
5 Comments
Maybe I've made the question too complex?
If it helps, can anybody tell me how to do the following?
(1) Using x in the range 0 to 20, plot y=x^2 and plot the graph.
(2) Is there a library function which will allow me to calculation combiations i.e. nCr values?
Thanks in advance
Issac
If it helps, can anybody tell me how to do the following?
(1) Using x in the range 0 to 20, plot y=x^2 and plot the graph.
(2) Is there a library function which will allow me to calculation combiations i.e. nCr values?
Thanks in advance
Issac
Active today
Are you searching the tool formaking graphs or you already use some?
For the combinatorics, the standard module itertools implements some generators that return combinations and permutations. See http://docs.python.org/library/itertools.html
For the combinatorics, the standard module itertools implements some generators that return combinations and permutations. See http://docs.python.org/library/itertools.html
Hi pepr
To plot the graph I was going to use matplotlib (?)
Essentially all I'm asking is given a function, be it y = x^2, y = sin x + x^3, or whatever and an array of x values e.g. x = -2, -1, 0, 5, 10, how do I plot the graph.
I come from a C++ background, so I assumed that you could have an array of x values e.g. x[5] (for the above) from which I could then calculate the corresponding y values y[5], and then pass these into some kind of plotting routine e.g. matplotlip must have something I suspect.
Any ideas?
To plot the graph I was going to use matplotlib (?)
Essentially all I'm asking is given a function, be it y = x^2, y = sin x + x^3, or whatever and an array of x values e.g. x = -2, -1, 0, 5, 10, how do I plot the graph.
I come from a C++ background, so I assumed that you could have an array of x values e.g. x[5] (for the above) from which I could then calculate the corresponding y values y[5], and then pass these into some kind of plotting routine e.g. matplotlip must have something I suspect.
Any ideas?
Active today
Well, it depends. I do not know matplotlib. It is likely that it offers mathematical functions including somethin like numpy (that is not part of the standard Python). Python has the math standard module -- see http://docs.python.org/library/math.html and some mathematical functions built into the interpreter. However, it may be much more efficient to use the matplotlib's equivalents. It could also be the case that you prepare x list and the function and the matplotlib computes the results on its own. I do not know. Just generally, the python list type can be used as a heterogeneous dynamic array, zero-based indexing. You can calculate a separate list of y values or a list of tuples with the point coordinates, etc:
a.py
It prints:
a.py
def fn(x):
return x**2
xlst = [-2, -1, 0, 5, 10]
ylst = []
points = []
for x in xlst:
ylst.append(fn(x))
points.append( (x, fn(x)) )
print xlst
print ylst
print points
It prints:
c:\tmp\_Python\IssacJones\Q_27288526>python a.py
[-2, -1, 0, 5, 10]
[4, 1, 0, 25, 100]
[(-2, 4), (-1, 1), (0, 0), (5, 25), (10, 100)]
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
On September 29, 2012, the Python 3.3.0 was released; nothing extremely unexpected, yet another, better version of Python. But, if you work in Microsoft Windows, you should notice that the Python Launcher for Windows was introduced wi…
Learn the basics of if, else, and elif statements in Python 2.7.
Use "if" statements to test a specified condition.:
The structure of an if statement is as follows:
(CODE)
Use "else" statements to allow the execution of an alternative, if the …
Learn the basics of modules and packages in Python.
Every Python file is a module, ending in the suffix: .py: Modules are a collection of functions and variables.: Packages are a collection of modules.: Module functions and variables are accessed us…
Suggested Courses
Course of the Month4 days, 21 hours left to enroll
670 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.