MATLAB Programming Fundamentals - MathWorks

Examine Values While Debugging

While your program is paused, you can view the value of any variable currently in the

workspace. Examine values when you want to see whether a line of code produces the

expected result or not. If the result is as expected, continue running or step to the next

line. If the result is not as you expect, then that line, or a previous line, might contain an

error.

Select Workspace

To examine a variable during debugging, you must first select its workspace. Variables

that you assign through the Command Window or create using scripts belong to the base

workspace. Variables that you create in a function belong to their own function

workspace. To view the current workspace, select the Editor tab. The Function Call

Stack field shows the current workspace. Alternatively, you can use the dbstack

function in the Command Window.

To select or change the workspace for the variable you want to view, use either of these

methods:

• From the Editor tab, in the Debug section, choose a workspace from the Function
  Call Stack menu list.


• From the Command Window, use the dbup and dbdown functions to select the
  previous or next workspace in the Function Call Stack.

To list the variables in the current workspace, use who or whos.

View Variable Value

There are several ways to view the value of a variable while debugging a program:

• View variable values in the Workspace browser and Variables Editor.

The Workspace browser displays all variables in the current workspace. The Value

column of the Workspace browser shows the current value of the variable. To see more

Examine Values While Debugging