Re: Invalid index error

[Geraint Paul Bevan]

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Rich Shepard wrote:
| On Sun, 1 Aug 2004, Geraint Paul Bevan wrote:
|
|
|>The final value of the loop counter i is 6, but you are referencing
|>element a1(i+1) and 6+1=7 which is beyond the end of the array.
|
|
|   Sigh. Of course.
|
|   What is the better way of writing this, then?
|
| Thanks,
|
| Rich
|

To use the for loop, you just need to change (i+1) to (i):

octave:1> a = rand(1,6)
a =

~  0.81472  0.13548  0.90579  0.83501  0.12699  0.96887

octave:2> product = 1;
octave:3> for i = 1:6
| product = product * a(i)
| endfor
product = 0.81472
product = 0.11038
product = 0.099978
product = 0.083482
product = 0.010601
product = 0.010271

However, in this case, you can make use of Octave's "prod" function to
save yourself a little work:

octave:4> prod(a)
ans = 0.010271


- --
Geraint Bevan
http://homepage.ntlworld.com/geraint.bevan

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