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MathGroup Archive 2002

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Re: Stumped again on a simple list

  • To: mathgroup at smc.vnet.net
  • Subject: [mg32814] Re: [mg32795] Stumped again on a simple list
  • From: Sseziwa Mukasa <mukasa at jeol.com>
  • Date: Thu, 14 Feb 2002 01:43:30 -0500 (EST)
  • Organization: JEOL (USA) Ltd.
  • References: <200202121123.GAA12116@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

"1.156" wrote:

> Greetings cypherers all,
>
> I make a simple list ii and I find I can make other lists easily by algebraic moves like
> jj=ii/2, etc.  But when I want make a new list which splits two different formula, I'm stumped.
>
> Here's a stripped down version to illustrate my problem.  I want to use the value in the original
> array to determine how to make the new array.  The If[] is the only thing I can find to make
> this decision.  But, it seems I'm not even close when I try:
>
> ii=Table[z,{z,50,1400,5}];
>
> jj=If[ii<100,50,200]
>
> I've looked around a good bit but have not stumbled into any topic that appears to bear on this problem.
>
> Can I please ask a kind soul to (again) point me in the right direction?
>
> Thanks, Rob

ii < 100 will result in a list, in this case what you want to do is map the transformation across the list:

jj=If[#<100,50,200]&/@ii

Regards

Ssezi



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