Warning – backtrace mode

In the backtrace warning mode, MATLAB provides the necessary information on the error along with the location of error in the code. This mode is useful when working with large codes where it is hard to find the error manually. The location displayed by MATLAB is a hyperlink that will redirect you to the error statement.

Backtrace mode can also be turned in two manners, similar to verbose mode.

warning on backtrace

—OR—

warning(‘on’, ‘backtrace’)

Let us see an example of each variant.

Example 3

We shall use the same example of removing the not existing path to generate an error.

The output is:

As can be seen, MATLAB gives the location of the error-generating statement with a hyperlink. 

Example 4

Now, we shall use the other variant to generate the same results.

Here, we use warning as a function call to turn on backtrace mode. We shall receive the same output as before.

MATLAB displays warnings whenever there are errors in the execution of a code. These messages vary in detail depending on the method chosen by the user for their warning messages. MATLAB provides two modes of warning messages

1. Verbose 
2. Backtrace

In verbose mode, MATLAB gives information on the error as well a method to suppress the warning. On the other hand, in backtrace mode, MATLAB gives the location inside a code execution where, the warning generated.

In this article, we shall see how to use warning displays using the above modes.