Standard PC Installation Procedure (MATLAB Installation Guide for PC) MATLAB Installation Guide for PC     Setting Up MATLAB Environment Options To include welcome messages, default definitions, or any MATLAB expressions that you want executed every time MATLAB is invoked, create a file named startup.m in the $MATLAB\toolbox\local directory. MATLAB executes this file each time it is invoked. Configuring Certain Release 12.1 Products Certain Release 12.1 products require additional configuration. The following table lists these products and the commands used to configure them. If you installed any of these products, see the documentation for that product for detailed configuration information. Product Command MATLAB Notebook notebook -setup MATLAB Runtime Server rtsetup Real-Time Windows Target rtwintgt -setup Excel Link Versions By default, Excel Link (a separately orderable product) supports Excel 97. However, the installer puts two versions of Excel Link in the toolbox\exlink subdirectory. Files with 95 appended to their names (e.g. excllink95.xla and ExliSamp95.xls) correspond to Excel 7. Files without this identifier (e.g., excllink.xla and ExliSamp.xls) correspond to Excel 97. Use the appropriate files for your version of Excel.  After You Install Finding Information About MATLAB