There is not currently a way of switching them off since - we can't easily have two different types of float parameters since that would require, for example, committing to a particular parameter never being optimized and cause all sorts of problems if two people write code that disagreed on this decision

- the memory usage for a scheme to keep track of whether certain parameters have derivatives or not is not likely to be much lower than assuming they all do

Are you having memory issues?

On Dec 19, 2008, at 12:43 AM, Friedrich Foerster <foerster@biochem.mpg.de > wrote:

> hi all, > > when checking the attributes of my IMP particles i discovered that > all float attributes have derivative values. is there any option to > switch that off? > now i get derivatives for fixed parameters such as radii or mass > weights, which are a mere waste of memory. > a possible solution would be to distinguish attributes into > variables and parameters. > > thanks > > frido > > -- > > Friedrich Foerster > Max-Planck Institut fuer Biochemie > Am Klopferspitz 18 > D-82152 Martinsried > > Tel: +49 89 8578 2651 > Fax: +49 89 8578 2641 > > foerster@biochem.mpg.de > > www.tomotronic.org > > > > > > > _______________________________________________ > IMP-dev mailing list > IMP-dev@salilab.org > https://salilab.org/mailman/listinfo/imp-dev