A Matlab interface to Dapper - an OPeNDAP in-situ data service Dapper is a newly emerging, community-standard OPeNDAP server for in situ data. DapperM is a Matlab interface to data served by the Dapper OPeNDAP server. Matlab functions include an interactive lat/lon/depth/time data selection tool and functions for obtaining and using selected profile and time series datasets. The functions are described below, and an example is given. Documentation is built into Matlab for convenience of the user.