How to Change Line Style in MATLAB: Simple Guide

In MATLAB, you change a line style by setting the LineStyle property when plotting, for example plot(x, y, 'LineStyle', '--') for dashed lines. You can use styles like solid ('-'), dashed ('--'), dotted (':'), and dash-dot ('-.').

Syntax

The basic syntax to change line style in MATLAB is:

• plot(x, y, 'LineStyle', style) where style is a string defining the line pattern.
• Common styles include '-' (solid), '--' (dashed), ':' (dotted), and '-.' (dash-dot).

matlab

plot(x, y, 'LineStyle', '--')

Example

This example shows how to plot a sine wave with different line styles.

matlab

x = linspace(0, 2*pi, 100);
y = sin(x);
plot(x, y, 'LineStyle', '--', 'Color', 'b', 'LineWidth', 2)
title('Sine Wave with Dashed Line')
xlabel('x')
ylabel('sin(x)')

Output

A plot window opens showing a blue sine wave with a dashed line style and line width of 2.

Common Pitfalls

Common mistakes when changing line styles include:

• Using the line style character directly in the format string without quotes, e.g., plot(x, y, --) which causes errors.
• Confusing the LineStyle property with the color or marker properties.
• Not specifying the LineStyle property name, which can lead to unexpected default styles.

Correct usage example:

matlab

plot(x, y, 'LineStyle', '--') % Correct

% Wrong usage example:
% plot(x, y, --) % This will cause an error

Quick Reference

Line Style	Symbol	Description
Solid	'-'	Continuous solid line
Dashed	'--'	Line with dashes
Dotted	':'	Line with dots
Dash-dot	'-.'	Line with dash-dot pattern
None	'none'	No line displayed

Key Takeaways

Use the 'LineStyle' property in plot functions to change line appearance.

Common line styles are solid ('-'), dashed ('--'), dotted (':'), and dash-dot ('-.').

Always specify 'LineStyle' as a string to avoid syntax errors.

Combine 'LineStyle' with 'Color' and 'LineWidth' for better plot customization.

Refer to the quick reference table for line style symbols.