Specify Line and Marker Appearance in Plots - MATLAB & Simulink

Customize the lines and markers in a plot.
Many plotting functions have a single argument for specifying the color, the line style, and the marker. For example, the plot function has an optional linespec argument for specifying one or more of these aspects. (Alternatively, you can set properties to modify the plot after creating it.)
You can modify other aspects of lines by setting properties. For example, Line objects have a LineWidth property for controlling the line's thickness. To create a thicker line, you can specify the LineWidth as a name-value argument when you call the plot function. In this case, set the LineWidth to 3. Return the Line object as p so you can set other properties later.

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LineSpec (MATLAB Functions)