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HI Dave,
Thanks for your reply and explanation. Now, I
understand better after you and Herman explanation.
Tks
KK
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
Dave Merrill
To: <A
href=""
title=amibroker@xxxxxxxxxxxxxxx>amibroker@xxxxxxxxxxxxxxx
Sent: Monday, January 19, 2004 12:52
PM
Subject: RE: [amibroker] Strange
subscript out of range
<SPAN
class=974062604-19012004>KK, please excuse if I'm saying stuff you already
know, and please someone set me straight if I'm off base.
<SPAN
class=974062604-19012004>
<SPAN
class=974062604-19012004>As I understand it, in AB *every* array, no matter
how it's used in your code, is sized to the number of bars in the current
ticker, ie, BarCount elements, starting at [0] and ending at [BarCount-1]. For
example, say you needed an array of 10 particular numbers for use as MA
periods you want to cycle through for whatever reason. That array actually has
BarCount elements, always, even if you use only the first 10. For a stock with
many years of data, that's thousands of unused elements. You also need to be
careful to access only array elements that actually exists, or you'll get
subscript out of range errors; that's the reason for stopping your loop at i
< BarCount. Watch this especially when you hit a stock with no data. You
can't even put those 10 numbers in an array in that case.
<SPAN
class=974062604-19012004>
<SPAN
class=974062604-19012004>If you're used to programming in other general
purpose languages, you may find this aspect of arrays in AB a little
counterintuitive. I know I did, but they're still really
useful.
<SPAN
class=974062604-19012004>
<SPAN
class=974062604-19012004>Dave
<BLOCKQUOTE
>
Thanks for your help. Just for discussion
purpose, isn't count=0 at the beginning of my code should have initialise
all count array to 0 (zero) ?
The problem is solved after I changed the
for(j=1;j<500;j++) to for(j=1;j<barcount;j++). The key is using
barcount, although I'm still not really understand the rationale behind but
it is working now.
Graham, thanks to you too. That is another way
to do it but a bit slow.
best regards
KKSend BUG
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