Write to a Diary File

To keep an activity log of your MATLAB^® session, use the diary function. diary creates a verbatim copy of your MATLAB session in a disk file (excluding graphics).

For example, if you have the array A in your workspace,

A = [ 1 2 3 4; 5 6 7 8 ];

execute these commands at the MATLAB prompt to export this array using diary:

Turn on the diary function. Optionally, you can name the output file diary creates:
```
diary my_data.out
```
Display the contents of the array you want to export. This example displays the array A. You could also display a cell array or other MATLAB class:
```
A =
    1     2     3     4
    5     6     7     8
```
Turn off the diary function:
```
diary off
```
diary creates the file my_data.out and records all the commands executed in the MATLAB session until you turn it off:
```
A =

     1     2     3     4
     5     6     7     8

diary off
```
Open the diary file my_data.out in a text editor and remove the extraneous text, if desired.