Udo, Tomasz is correct. As the code inside the "if" statement assumes at least 10 data points are available, the "if" statement must test for >= 10, not < 10 which is what yours is doing.
GP --- In [email protected], Udo Harke <[EMAIL PROTECTED]> wrote: > > HI; > > YOU SHOULD CODE > > if( !(BarCount >= 10) ) > { > > ..... put code that assumes that you have 10 data points available here. > > } > > instead! > > Regards, > > Udo > > "Tomasz Janeczko (groups)" <[EMAIL PROTECTED]> wrote: > Hello, > > You must not assume that you have some fixed number of > data elements available. *Always* perform a check for BarCount. > > So instead of: > > for (i = 0; i < 10; i++) myArr[i] = 0; > > always include check: > > for (i = 0; i < 10 AND i < BarCount; i++) myArr[i] = 0; > > alternatively: > > if( BarCount >= 10 ) > { > > ..... put code that assumes that you have 10 data points available here. > > } > > Best regards, > Tomasz Janeczko > amibroker.com > ----- Original Message ----- > From: "gp_sydney" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Saturday, June 16, 2007 2:08 AM > Subject: [amibroker] Re: New file uploaded to amibroker > > > > I still do not understand what the difference between the size of an > > > array and the number of elements in an array is. > > > > They are the same, but when you have a loop writing only 10 elements > > to an array, that's not how many elements are in the array, it's only > > the number of elements you've changed. The array might have 1000 > > elements and all you've done is overwrite the first 10. > > > > The size of an array is how many elements it's physically possible to > > change because there's actually memory allocated for their storage. In > > AmiBroker that's always BarCount. > > > > As I sort-of mentioned before, using arrays where the index is > > something other than bars, and you fix the range of the index to > > something other than BarCount, can easily lead to problems. If you > > have such a formula in a backtest and run that across all symbols, the > > moment you hit a symbol where BarCount is less than the maximum index > > you use, you'll get an overflow error. > > > > For example, if you have the following code in a backtest: > > > > for (i = 0; i < 10; i++) myArr[i] = 0; > > > > and run it over all symbols, if you hit a new listing that only has > > five bars on the chart then you'll get an overflow error when myArr[5] > > is referenced for that symbol. > > > > Regards, > > GP > > > > > > > > > > Please note that this group is for discussion between users only. > > > > To get support from AmiBroker please send an e-mail directly to > > SUPPORT {at} amibroker.com > > > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > > http://www.amibroker.com/devlog/ > > > > For other support material please check also: > > http://www.amibroker.com/support.html > > > > Yahoo! Groups Links > > > > > > > > > > >
