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Article #102

Re: Combining vectors

#102
From: Ron L. Dilsavor
Date: Wed, 27 Jan 1993 15:58
33 lines
1606 bytes
In article <1k5hf2INNlgs@shelley.u.washington.edu> phantom@stein2.u.washington.edu (The Phantom) writes:
>In article <1993Jan26.182616.11550@vax.oxford.ac.uk> reese@vax.oxford.ac.uk writes:
>>
>>
>>I want to take two vectors and combine them, e.g.
>>[ a b c d e]  and [ f g h i j ] 
>>become  [ a f b g c h d i e j ]
>>
>
>say a=[ a b c d e ] and b=[ f g h i j ] -- an easy way to do this would be
>using ...
>
>len=length(a);			%assuming length(a), length(b) are equal
>FOR count=1:len,
>	c((count*2)-1)=a(count);
>	c((count*2)=b(count);
>END
>
>that seems to work, anyway. just work with the commands for picking out 
>certain matrix spots and FOR loops, and you should be able to comprise 
>something that works both ways.
>
>mt
>

Try to avoid using slow FOR loops if you can.
Here is a neat way which is faster

c(2:2:2*length(b))=b;
c(1:2:length(c))=a;

Ron Dilsavor
dilsavor@ee.eng.ohio-state.edu
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From: dilsavor@dosequis.eng.ohio-state.edu (Ron L. Dilsavor)
Subject: Re: Combining vectors
Message-ID: <1993Jan27.155815.23225@ee.eng.ohio-state.edu>
Sender: news@ee.eng.ohio-state.edu
Organization: The Ohio State University Dept of Electrical Engineering
References: <1993Jan26.182616.11550@vax.oxford.ac.uk> <1k5hf2INNlgs@shelley.u.washington.edu>
Date: Wed, 27 Jan 1993 15:58:15 GMT
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