Skip to content
MathWorks - Mobile View
  • Melden Sie sich bei Ihrem MathWorks Konto anMelden Sie sich bei Ihrem MathWorks Konto an
  • Access your MathWorks Account
    • Eigener Account
    • Mein Community Profil
    • Lizenz zuordnen
    • Abmelden
  • Produkte
  • Lösungen
  • Forschung und Lehre
  • Support
  • Community
  • Veranstaltungen
  • MATLAB erhalten
MathWorks
  • Produkte
  • Lösungen
  • Forschung und Lehre
  • Support
  • Community
  • Veranstaltungen
  • MATLAB erhalten
  • Melden Sie sich bei Ihrem MathWorks Konto anMelden Sie sich bei Ihrem MathWorks Konto an
  • Access your MathWorks Account
    • Eigener Account
    • Mein Community Profil
    • Lizenz zuordnen
    • Abmelden

Videos und Webinare

  • MathWorks
  • Videos
  • Videos Homepage
  • Suche
  • Videos Homepage
  • Suche
  • Vertrieb kontaktieren
  • Testsoftware
1:51 Video length is 1:51.
  • Description
  • Full Transcript
  • Related Resources

Validating Function Inputs

Use function argument validation in MATLAB® to declare specific restrictions on function input arguments. You can constrain the class, size, and other aspects of function input values without writing code in the body of the function to perform these tests.

Creating robust functions that check input arguments for errors can result in code that looks complicated and is difficult to understand.

Note that most of the code for this simple function is error checking code.

Using function input argument validation, you can constrain the class, size, and other aspects of function inputs without writing a lot of code in the body of the function to perform these tests.

And it provides users with clear error messages.

With function input argument validation, you can include a default value for optional input arguments—in this case, (0,0)—and MATLAB will override it if the user provides a value.

Now let's look at an example function that plots a quadrilateral.

The algorithm requires row vectors containing four elements for the operations to work.

But what happens when we pass in column vectors instead? I’ll do this by transposing one of our inputs.

In the case of 1D arrays, function input argument validation automatically transposes the inputs to the expected orientation for you.

This function also accepts two custom name-value pairs—LineType and LineThickness—which are defined in the code as a struct.

Using this syntax enables auto-complete suggestions for your custom name-value pairs.

With function input argument validation, you can eliminate cumbersome argument-checking code and improve the readability, robustness, and maintainability of your code.

Read the documentation to learn more.

Related Products

  • MATLAB

Bridging Wireless Communications Design and Testing with MATLAB

Read white paper
Related Information
Read Documentation

Feedback

Featured Product

MATLAB

  • Request Trial
  • Get Pricing

Up Next:

2:46
Varargin and Nargin - Variable Inputs to a Function

Related Videos:

7:15
Arduino and MATLAB: Reading Inputs and Writing Outputs
3:22
Functions with Multiple Inputs or Outputs
4:05
Managing Code in MATLAB: Functions of Variable Numbers of...
5:14
Converting from a Formula to a Script to a Function

View more related videos

MathWorks - Domain Selector

Select a Web Site

Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .

  • Switzerland (English)
  • Switzerland (Deutsch)
  • Switzerland (Français)
  • 中国 (简体中文)
  • 中国 (English)

You can also select a web site from the following list:

How to Get Best Site Performance

Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.

Americas

  • América Latina (Español)
  • Canada (English)
  • United States (English)

Europe

  • Belgium (English)
  • Denmark (English)
  • Deutschland (Deutsch)
  • España (Español)
  • Finland (English)
  • France (Français)
  • Ireland (English)
  • Italia (Italiano)
  • Luxembourg (English)
  • Netherlands (English)
  • Norway (English)
  • Österreich (Deutsch)
  • Portugal (English)
  • Sweden (English)
  • Switzerland
    • Deutsch
    • English
    • Français
  • United Kingdom (English)

Asia Pacific

  • Australia (English)
  • India (English)
  • New Zealand (English)
  • 中国
    • 简体中文Chinese
    • English
  • 日本Japanese (日本語)
  • 한국Korean (한국어)

Contact your local office

  • Vertrieb kontaktieren
  • Testsoftware

MathWorks

Accelerating the pace of engineering and science

MathWorks ist der führende Entwickler von Software für mathematische Berechnungen für Ingenieure und Wissenschaftler.

Entdecken Sie…

Produkte

  • MATLAB
  • Simulink
  • Software für Studierende
  • Hardware-Unterstützung
  • File Exchange

Testen oder Kaufen

  • Downloads
  • Testsoftware
  • Vertrieb kontaktieren
  • Preise und Lizenzierung
  • Store

Lernen

  • Dokumentation
  • Tutorials
  • Beispiele
  • Videos und Webinare
  • Schulungen

Support

  • Hilfe zur Installation
  • MATLAB Answers
  • Consulting
  • License Center
  • Support kontaktieren

Über MathWorks

  • Jobs & Karriere
  • Newsroom
  • Soziales Engagement
  • Berichte von Anwendern
  • Über MathWorks
  • Select a Web Site United States
  • Trust Center
  • Handelsmarken
  • Datenschutz
  • Datendiebstahl verhindern
  • Status von Anwendungen

© 1994-2022 The MathWorks, Inc.

  • Facebook
  • Twitter
  • Instagram
  • YouTube
  • LinkedIn
  • RSS

Folgen Sie uns