How can I use fitdist function

Hello,

I tried to use the function fitdist. The only result is an error:

Undefined function 'fitdist' for input arguments of type 'double'.

Error in FitaNormalDistributiontoDataExample (line 13) pd = fitdist(x,'Normal')

This was the result of running the code from help file: C:\Users\...\Documents\MATLAB\Examples\FitaNormalDistributiontoDataExample\FitaNormalDistributiontoDataExample.m

%%Fit a Normal Distribution to Data  

% Copyright 2015 The MathWorks, Inc.

Load the sample data. Create a vector containing the patients' weight data.

load hospital
x = hospital.Weight;

Create a normal distribution object by fitting it to the data.

pd = fitdist(x,'Normal')

Plot the pdf of the distribution.

x_values = 50:1:250;
y = pdf(pd,x_values);
plot(x_values,y,'LineWidth',2)

What is wrong here?

Answer 1

[Jaimin]

Hi @Juergen Maier

The error message you are encountering suggests that MATLAB does not recognize the “fitdist” function. This could be due to a few reasons:

• The “fitdist” function is part of the Statistics and Machine Learning Toolbox. Make sure that this toolbox is installed and licensed on your MATLAB environment.
• Ensure that your MATLAB path is set correctly and that you are using a version of MATLAB that supports the “fitdist” function.
• It is possible that another function or script named “fitdist” is shadowing the built-in function. Check your current directory and the MATLAB path for any files named “fitdist.m”.

Here's how you can troubleshoot and resolve the issue:

• Go to the MATLAB “Command Window” and type “ver”. This will list all installed toolboxes. Look for "Statistics and Machine Learning Toolbox" in the list.
• Use the which command to check if the function is recognized: “which fitdist”.

For more information kindly refer following MathWorks documentation.

https://www.mathworks.com/products/statistics.html

I hope this will be helpful.

[Juergen Maier]

The answer is a little bit late ;-)