This example shows how to provide help for the programs you write. Help text appears
in the Command Window when you use the
Create help text by inserting comments at the beginning of your program. If your
program includes a function, position the help text immediately below the function
definition line (the line with the
function keyword). If the function
arguments block, you also can position the help text
immediately below the
For example, create a function in a file named
includes help text:
function c = addme(a,b) % ADDME Add two values together. % C = ADDME(A) adds A to itself. % % C = ADDME(A,B) adds A and B together. % % See also SUM, PLUS. switch nargin case 2 c = a + b; case 1 c = a + a; otherwise c = 0; end
When you type
help addme at the command line, the help text
displays in the Command Window:
addme Add two values together. C = addme(A) adds A to itself. C = addme(A,B) adds A and B together. See also sum, plus.
The first help text line, often called the H1 line, typically includes the program
name and a brief description. The Current Folder browser and the
lookfor functions use the H1 line to display information about
See also links by including function names at the end of
your help text on a line that begins with
% See also. If the function
exists on the search path or in the current folder, the
command displays each of these function names as a hyperlink to its help. Otherwise,
help prints the function names as they appear in the help
You can include hyperlinks (in the form of URLs) to Web sites in your help text.
Create hyperlinks by including an HTML
element. Within the anchor, use a
matlab: statement to execute a
web command. For
% For more information, see <a href="matlab: % web('https://www.mathworks.com')">the MathWorks Web site</a>.
End your help text with a blank line (without a
%). The help system
ignores any comment lines that appear after the help text block.
When multiple programs have the same name, the
determines which help text to display by applying the rules described in Function Precedence Order. However,
if a program has the same name as a MathWorks® function, the Help on Selection option in
context menus always displays documentation for the MathWorks function.