Set folder for storing idprefs.mat containing System Identification app startup information
The System Identification app systemIdentification allows a large number of variables for customized choices. These include the window layout, the default choices of plot options, and names and directories of the four most recent sessions with the System Identification app. This information is stored in the file idprefs.mat, which should be placed on the user's MATLABPATH. The default, automatic location for this file is in the same folder as the user's startup.m file.
midprefs is used to select or change the folder where you store idprefs.mat. Either type midprefs and follow the instructions, or give the folder name as the argument. Include all folder delimiters, as in the PC case
or in the UNIX® case