how call a function by same name in 2 different contexts?

*To*: mathgroup at smc.vnet.net*Subject*: [mg56715] how call a function by same name in 2 different contexts?*From*: "steve" <nma124 at hotmail.com>*Date*: Wed, 4 May 2005 00:34:23 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

There is a function called FourierTransform that is part of standard Mathematica. When I load the SignalProcessing package (a standalone Mathematica application), it also comes with its own version of FourierTransform function. The question is how can I, after loading the SignalProcessing package, specify explicitly which function I wish to call? I found that I could do the above as follows. To call the standard function type System`FourierTransform[Sin[t],t,w] To call the function in SignalProcessing package, do Needs["SignalProcessing`"] SignalProcessing`Support`SigProc`FourierTransform[Sin[t],t,w] The problem with the above solution is that I had to know before hand inside which context the FourierTransform function lived in the SignalProcessing package, by typing the command Context[FourierTransform] SignalProcessing`Support`SigProc` Is there a better way to do this? Why can't I just say something like "Call the FourierTransform function which is part of the SignalProcessing package" without having to know the full contextPath? But the bigger problem is that after I loaded the SignalProcessing package, the Context[FourierTransform] does NOT list the System`FourierTransform any more, even though I call still access this context as follows System`FourierTransform[Sin[t],t,w] It seems that loading the SignalProcessing package hides the context of the FourierTransform function in the System package as you can see: Context["FourierTransform"] System` Needs["SignalProcessing`"] Context["FourierTransform"] SignalProcessing`Support`SigProc` I was expecting this output Context["FourierTransform"] SignalProcessing`Support`SigProc` System` So that I can see where each function is and then call any one I want without ambiguity. Any idea how to handle all of this stuff? I do not think it is nice that one package hides away another function of the same name in different package. The whole idea of using packages is so that this sort of thing should not happen ! Is there a way to unload a specific package after loading it without having to restart Mathematica to clean things out? Thank you for any insight into this issue nma124

**Follow-Ups**:**Re: how call a function by same name in 2 different contexts?***From:*Omega Consulting <info@omegaconsultinggroup.com>

**Re: how call a function by same name in 2 different contexts?***From:*"Hermann Schmitt" <schmitther@t-online.de>