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Topic: set option flag in function definition
Replies: 1   Last Post: Sep 19, 2012 4:57 AM

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Alexei Boulbitch

Posts: 483
Registered: 2/28/08
Re: set option flag in function definition
Posted: Sep 19, 2012 4:57 AM
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Dear Experts,

I had one question regarding to the function definition.

I want to have a function that executes certain operation when I chose the
corresponding option flag.

For example,

a function called "f"

when I call it like f[arg1,arg2,arg3, optionX]
it executes command

If I call it like f[arg1,arg2,arg3,optionY]
it executes command

If I call it like f[arg1,arg2,arg3,optionSomethingElse]
it returns me
"No appropriate option flag was found. Please indicate correct options"

This looks a bit like scripts running in UNIX. I am wondering if I can do
the same in Mathematica easily?

Thank you so much for your kind help!

The trivial solution would be to use If operator or a Piecewise function. For example:

f[arg1_,arg2_,arg3_, option_]:=If[option==optionX, arg1/arg2+arg3,
If[option==optionY, arg1*arg2-arg3, Print["No
appropriate option flag was found. Please indicate correct options"]

Is it unacceptable for whatever reason?

Have fun. Alexei

Alexei BOULBITCH, Dr., habil.
ZAE Weiergewan,
11, rue Edmond Reuter,
L-5326 Contern, LUXEMBOURG

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