Article View: comp.soft-sys.matlab
Article #85Re: Combining vectors
From: Weizheng Wang
Date: Wed, 27 Jan 1993 14:47
Date: Wed, 27 Jan 1993 14:47
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1864 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 the following: % assignment of your vector x = ['a' 'b' 'c' 'd' 'e']; y = ['f' 'g' 'h' 'i' 'j']; % assign an index vector ind = [1:length(x)]; %assign the vector z(ind*2-1) = x; z(ind*2) = y; %reverse assignment %assign an index in a reverse way: ind2 = [length(x) : -1 : 1]; %assign the vector z2(ind*2-1) = x(ind2); z2(ind*2) = y(ind2); Actually, the contents of ind and ind2 can be any number in the index range. I believe the example shows the most efficient and flexible way to use MATLAB.
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Path: arc1-ca.pugleaf.net!sparky!uunet!news.univie.ac.at!scsing.switch.ch!univ-lyon1.fr!ghost.dsi.unimi.it!rpi!gatech!usenet.ins.cwru.edu!agate!spool.mu.edu!howland.reston.ans.net!usc!usc!not-for-mail From: wang@nyquist.usc.edu (Weizheng Wang) Newsgroups: comp.soft-sys.matlab Subject: Re: Combining vectors Date: 27 Jan 1993 06:47:57 -0800 Organization: University of Southern California, Los Angeles, CA Lines: 47 Message-ID: <1k67atINNb9p@nyquist.usc.edu> References: <1993Jan26.182616.11550@vax.oxford.ac.uk> <1k5hf2INNlgs@shelley.u.washington.edu> NNTP-Posting-Host: nyquist.usc.edu