## Main.MatlabFunctions History

June 21, 2020, at 04:11 AM by 136.36.211.159 -
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April 26, 2016, at 12:48 PM by 45.56.3.173 -

#### Custom MATLAB Functions

User-defined MATLAB functions are custom routines that accept inputs, perform some type of specialized calculation, and return and output. This tutorial exercise demonstrates how to create a custom script file and use it to perform custom calculations.

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(:title MATLAB Statistical Functions:) (:keywords big data, data analysis, Mathworks, MATLAB, statistics, average, min, max, stdev, university course:) (:description Introduction to statistical functions in MATLAB, implemented to analyze a data set:)

The following tutorial is an introduction to MATLAB functions such as average, standard deviation, maximum, minimum, and conditional counting.

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#### MATLAB Source Code

 % clear session and screen
clear all; clc
% create a new column vector with 10 elements
%  with random numbers between 0 and 100
y = rand(10,1) * 100;
disp(y)
% basic statistics
mean(y)
max(y)
min(y)
std(y)
% define a new anonymous function
avg = @(x) sum(x)/length(x)
% check new function
disp('Average with avg function: ')
avg(y)
disp('Average with mean function: ')
mean(y)
% number of values below 50
% boolean vector of 0 or 1 values
disp(y<50)
% display result
disp('Number of values below 50: ')
z = y<50;
disp(sum(z))


Data statistics can also be completed with a spreadsheet program like Microsoft Excel and Python where the data sets are arrays or matrices instead of tables in a spreadsheet. Click on the appropriate link for additional information and source code.

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