From help-request at octave dot org Sun Feb  6 16:34:55 2005
Subject: Re: unit sample sequence ->step
From: Quentin Spencer <qspencer at ieee dot org>
To: NZG <ngustavson at emacinc dot com>
CC: help at octave dot org
Date: Sun, 06 Feb 2005 16:37:14 -0600

I would implement that like this (assuming, like you do, that the input 
vector t contains time indices):

u=zeros(size(t));
u(find(t>=0))=1;



NZG wrote:

>It does, my bad, I meant the unit step.
>
>function retval = u(t)
>for i = 1:length(t)
>if (t(i) >= 0)
>retval(i)=1;
>else
>retval(i)=0;
>endif
>endfor
>endfunction
>
>
>NZG.
>
>On Friday 04 February 2005 12:39 pm, you wrote:
>  
>
>>On Thu, Feb 03, 2005 at 09:21:32PM -0600, NZG wrote:
>>    
>>
>>>Is there an easy way to generate  vector/matrix representing  the unit
>>>sample sequence in Octave?
>>>
>>>thx,
>>>NZG.
>>>      
>>>
>>If "unit sample sequence" means the same as at
>>
>>  http://www.swarthmore.edu/NatSci/echeeve1/Class/e71/E71L1/E71L1.html
>>
>>then it's just u=zeros(1,n); u(d)=1.  For example:
>>
>>octave> u=zeros (1, 4); u(2)=1
>>u =
>>
>>  0  1  0  0
>>
>>
>>Geordie McBain
>>www.aeromech.usyd.edu.au/~mcbain
>>    
>>
>
>
>
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