Emmanuel Courcelle wrote: > Hello > > I am testing the analysis capabilities of Base 2.1, and I do not > understand the plugin called "JEP extra value calculator": > what is its aim, and how does it work ?
It can calculate new values for each spot using the intensities and other already existing extra values. It uses the JEP (Java Expression Parser; http://www.singularsys.com/jep/) for parsing the formula used to calculate the extra values. The extra values are stored in the database. > When I try to use it, he asks me for an "Extra value type". He wants me > to select a value type, so I have to create a new extra value type: he > then asks me for an External ID. What does this mean ? All extra values must be registered by a server administrator before it can be used. It was a requirement made by our user group. The "External ID" allows you to reference the calculated values later on. You can for example use them in filters, and for doing more calculations. If you for example have an extra value called 'x' you could create a filter: xtra('x') > 0 or create a new extra value: logx = log(xtra('x')) /Nicklas ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ The BASE general discussion mailing list basedb-users@lists.sourceforge.net unsubscribe: send a mail with subject "unsubscribe" to [EMAIL PROTECTED]
