|
PureBytes Links
Trading Reference Links
|
Hi All,
I've got some code to determine the bar number for a bar that
corresponds to a previous date. What's strange is that I always get
an array index error, eventhough the debug window shows the code
executing successfully twice before it fails on a third execution --
all three executions coming from a single click of the Apply button
in the editor window. The code is below, followed by the debug output
for the trace statements. If I create a new indicator, paste the code
in and click apply, I'll see the candle chart flash, and then I'll
get an array index error. If I look at the debug output, everything
looks fine through those first two executions of the code (why two?)
and then suddenly -- with no user intervention whatsoever -- an array
of datenums becomes empty on a third run through the script.
Can anyone identify the issue? This is driving me nuts. I'm hoping I
won't have to rewrite everything in vbscript of vb or something to
avoid this craziness.
_TRACE(" ");
_TRACE("Starting...");
_TRACE(" ");
DN = DateNum();
nLastDateNum = LastValue(DN);
nLastBarNum = LastValue(BarIndex());
bContinue = False;
bLoop = True;
bDebug = True;
noBarsBack = 80;
startBar = 0;
nCurBar = 0;
// -- We want bar index for 10/19/1999
nYear = 1999; nMonth = 10; nday = 19;
nExploreDate = (10000 * (nYear - 1900)) + (100 * nMonth) + nDay;
if (nExploreDate > 0) {
bLoop = True;
bContinue = False;
// -- There have to be enough bars
if (nLastDateNum >= nExploreDate
&& nLastBarNum >= (noBarsBack+1)) {
// -- keep moving 1/2 the direction
// just moved toward desired bar
idx = int(nLastBarNum /2);
previdx = nLastBarNum;
swapidx = 0;
while (bLoop) {
// -- Let's see in dbg view what I have
_TRACE("idx: " + idx);
_TRACE("DN[idx]: " + WriteVal(DN[idx], 7.0));
testDN = DN[idx];
if (testDN == nExploreDate) {
bLoop = False;
if (idx >= (noBarsBack+1)) {
startBar = idx;
bContinue= True;
}
} else if (testDN < nExploreDate) {
// -- move 1/2 the distance of last move forward
swapidx = idx;
idx = idx + int( abs((previdx - idx))/ 2);
previdx = swapidx;
if (idx==previdx) bLoop = False;
} else {
swapidx = idx;
idx = idx - int(abs((previdx - idx))/ 2);
previdx = swapidx;
if (idx==previdx) bLoop = False;
}
}
}
// -- if (nExploreDate > 0)
} else {
startBar = nLastBarNum;
noBarsRequired = noBarsBack+1;
bProcess = True;
}
GraphXSpace=7;
// -- Plot basic candle chart
PlotOHLC(Open, High, Low, Close,
"BIdx = " + BarIndex() +
"\n" + "O = " + O + "\n"+"H = "+ H + "\n"+"L = " + L
+ "\n"+"C ",
colorBlack, styleCandle);
// *************************************
Debug output:
[22140]
[22140] Starting...
[22140]
[22140] idx: 721
[22140] DN[idx]: 1,010,814
[22140] idx: 360
[22140] DN[idx]: 1,000,309
[22140] idx: 180
[22140] DN[idx]: 990,623
[22140] idx: 270
[22140] DN[idx]: 991,029
[22140] idx: 225
[22140] DN[idx]: 990,826
[22140] idx: 247
[22140] DN[idx]: 990,928
[22140] idx: 258
[22140] DN[idx]: 991,013
[22140] idx: 263
[22140] DN[idx]: 991,020
[22140] idx: 261
[22140] DN[idx]: 991,018
[22140] idx: 262
[22140] DN[idx]: 991,019
[22140]
[22140] Starting...
[22140]
[22140] idx: 721
[22140] DN[idx]: 1,010,814
[22140] idx: 360
[22140] DN[idx]: 1,000,309
[22140] idx: 180
[22140] DN[idx]: 990,623
[22140] idx: 270
[22140] DN[idx]: 991,029
[22140] idx: 225
[22140] DN[idx]: 990,826
[22140] idx: 247
[22140] DN[idx]: 990,928
[22140] idx: 258
[22140] DN[idx]: 991,013
[22140] idx: 263
[22140] DN[idx]: 991,020
[22140] idx: 261
[22140] DN[idx]: 991,018
[22140] idx: 262
[22140] DN[idx]: 991,019
[22140]
[22140] Starting...
[22140]
[22140] idx: 721
[22140] DN[idx]: {EMPTY}
On the third run -- and I have no idea why the code executes three
times for one button click -- DN[idx]: {EMPTY} is suddenly empty.
This makes absolutely no sense to me. Thanks for your help on this.
Gordon
------------------------ Yahoo! Groups Sponsor --------------------~-->
Make a clean sweep of pop-up ads. Yahoo! Companion Toolbar.
Now with Pop-Up Blocker. Get it for free!
http://us.click.yahoo.com/L5YrjA/eSIIAA/yQLSAA/GHeqlB/TM
--------------------------------------------------------------------~->
Check AmiBroker web page at:
http://www.amibroker.com/
Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/amibroker/
<*> To unsubscribe from this group, send an email to:
amibroker-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|