Re: Using package functions in Manipulate/DynamicModule

*To*: mathgroup at smc.vnet.net*Subject*: [mg109149] Re: Using package functions in Manipulate/DynamicModule*From*: Albert Retey <awnl at gmx-topmail.de>*Date*: Mon, 19 Apr 2010 04:11:59 -0400 (EDT)*References*: <hq0mqd$k0u$1@smc.vnet.net>

Hi, > So, I decided to try for the cell to just load the package whenever it > needs to be displayed for the first time. > "Initialization:>Needs["AddOns'"]" seemed to be perfect. However, it > doesn't work as expected. > For example: (SS and IListPlot are from AddOns.m) > Manipulate[ > IListPlot[SS[p, 100] @@ Range[100]], {p, 1, 100, 1}, > Initialization -> Needs["AddOns`"], SaveDefinitions -> True] > doesn't work and tells me there are double definitions in Global` and > AddOns` of IListPlot and SS (right after starting the kernel) I think your problem are namespaces and the time when symbols are created: When the Manipulate is seen, the variables IListPlot and SS will be created as variables in the Global` context, and only afterwards the package is loaded, creating the same variables in the AddOns`-Context. To prevent this there are several ways, one of the most straightforward would be to use explicitly the full long names of the symbols, that is (presumably) AddOns`IListPlot and AddOns`SS. There are several other possibilities, like only creating the symbols when the body is evaluated with something like: Symbol["IListPlot"][Symbol["SS"][p, 100] @@ Range[100]] for your ultimate goal to include everything in one notebook there seem to be solutions, but I don't know of anything "simple"... hth, albert