What is the function of the 'clear' command in MATLAB?

The 'clear' command in MATLAB is primarily used to remove all variables from the workspace, allowing for a clean slate where new variables can be created without interference from old ones. This is particularly useful when running scripts or functions where residual data from previous computations may cause errors or unexpected results. By ensuring that the workspace is clear, users can avoid conflicts that may arise from leftover variables.

While the command window, graph settings, and specific variable deletions are important functionalities in MATLAB, they are not the purpose of the 'clear' command. For instance, the command to clear the command window is 'clc', resetting graph settings involves separate commands related to graphical properties, and deleting a specific variable could be done with 'clear variableName'. Thus, the role of 'clear' is strictly focused on workspace management regarding variables, making it essential for effective programming and debugging in MATLAB.