That was quick - thanks herman. The problem was a divide by zero!
Why this got past me was that the zeroes in the closing price seemed to occur well before number of bars required for the actual calculation . I will look up stdev in the group anyway, sometimes it gets a bit frustrating looking through a couple of hundred posts and not findind the answer! Live and learn! Thanks again RZ ________________________________ From: Herman <[email protected]> To: ics4mer <[email protected]> Sent: Sat, 27 March, 2010 1:31:17 AM Subject: Re: [amibroker] problems with stdev? This was discussed some time back and has a logical explanation. Do a search for StDev( herman > Hi, > Getting a 0.0000 during explorations with stdev. > Not all stocks, just some. > However, using the same code, I get successful plots. > Can't find anything in the manual to indicate why this is > happening, and there seems to be no odd data in the symbol which might cause > it to go astray. > Here is the code, with some debug statements: > VSPR = (C/Ref(C,-1) ); //works OK > VSLog = log(C/Ref(C, -1)); // works OK > VolStd = StDev(log(C/ Ref(C,-1) ),200); // Fails, gives 0.000000 > Anyone have similar probs? > TIA > RZ > ------------ --------- --------- ------ > **** IMPORTANT PLEASE READ **** > This group is for the discussion between users only. > This is *NOT* technical support channel. > TO GET TECHNICAL SUPPORT send an e-mail directly to > SUPPORT {at} amibroker.com > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at > http://www.amibroke r.com/feedback/ > (submissions sent via other channels won't be considered) > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroke r.com/devlog/ > Yahoo! Groups Links
