I need help on small code

My code

function q=perfectbinomial(n,p)
i=0:floor(sqrt(n));
x=i.^2;
q=sum(binomialpmf(n,p,x));

Output supposed to be the below -

>> perfectbinomial(100,0.5)

ans =

0.0811

The message I am getting is -

>> perfectbinomial(100,0.5)

Unrecognized function or variable 'binomialpmf'.

Error in perfectbinomial (line 4)

q=sum(binomialpmf(n,p,x));

[darova]

What is this binomialpmf?

Answer 1

[Image Analyst]

Your binomialpmf() function is not in your current folder or one your search path. Did you mean binomialpdf - perhaps you misspelled your function. Is it a toolbox function? If so, it's not in any toolbox that I've bought.

Did you mean

BinomialDistribution

A BinomialDistribution object consists of parameters, a model description, and sample data for a binomial probability distribution

The binomial distribution models the total number of successes in repeated trials from an infinite population under the following conditions:

• Only two outcomes are possible for each of n trials.
• The probability of success for each trial is constant.
• All trials are independent of each other.

Creation

There are several ways to create a BinomialDistribution probability distribution object.

• Create a distribution with specified parameter values using makedist.
• Fit a distribution to data using fitdist.
• Interactively fit a distribution to data using the Distribution Fitter app.