plot functions not working: Error finding class matlab.gra​phics.char​t.primitiv​e.Line

Hey all,

Everytime I try to plot something I get the following error:

Error finding class matlab.graphics.chart.primitive.Line.

For example,

>> plot(x, y)

Error using plot

Error finding class matlab.graphics.chart.primitive.Line.

Thank you!

[Anjaneyulu Bairi]

can you post your entire code or attach here?

thanks.

[Jack Michael]

@Anjaneyulu Bairi

>> plot(x, y)

Error using plot

Error finding class matlab.graphics.chart.primitive.Line.

[Walter Roberson]

Reinstall MATLAB.

[Steven Lord]

Before reinstalling MATLAB, a slightly smaller hammer that might resolve the problem (if the cause is a corrupted MATLAB search path) would be to try restoredefaultpath.

[Jack Michael]

Even upon reinstalling, I am getting the same error. I have even tried installing previous verisons.

Answer 1

[Shubham]

Hi Jack,

The error message you're seeing suggests that MATLAB is having trouble locating the class definition for the Line object, which is a fundamental part of MATLAB's plotting system. This could be due to several reasons, such as a corrupted MATLAB installation, issues with the MATLAB path, or problems with Java on your system.

Here are some steps you can try to resolve this issue:

1. Ensure that the MATLAB path has not been altered to exclude important directories. You can reset the path to the default by using the command:

restoredefaultpath;
rehash toolboxcache;
matlab.graphics.chart.primitive.Line;

2. Sometimes, clearing the Java cache can resolve issues related to MATLAB's Java-based components:

clear java;

3. Try reinstalling the MATLAB as there might be a deeper issue with the MATLAB installation.