Hi Paul, may you compile your PHP binary with --enable-debug and after that run your sample scrit for once. See if there are leaks. Andrey Quoting Paul Hudson <[EMAIL PROTECTED]>: > Er, either the php-internals MARC archive doesn't show all attachments, or > my diff file got stripped en route for not having a .txt extension. I've > attached it again, just to make sure. > > > Paul > -- > > -----Original Message----- > From: Paul Hudson [mailto:[EMAIL PROTECTED] > Sent: 10 February 2004 00:30 > To: '[EMAIL PROTECTED]' > Subject: [PATCH] Bug #24064: Standard deviation > > Hi there, > > Bug #24064 (submitted by [EMAIL PROTECTED]) requests a standard deviation > function for PHP. I realise that any of you could implement this in 10 > minutes, but according to the bug database it is still Open so I figured I > would give it a try myself! > > There are probably a dozen errors in the code and/or places where it could > be better optimised, but I'm hoping one of you might be able to help with > that. So, the attached diff file implements the function array_std_dev(), > to calculate standard deviation using the deviation method. > > With the function in place, standard deviation is calculated like this: > > <?php > $scores = array(18,5,7,18,3,2,10); > print array_std_dev($score); > // prints 6.6833125519211 > ?> > > My first attempt at implementing this was using an extra array to buffer the > deviations - this was more out of curiosity to see how the array stuff > works. Sadly, it caused PHP to segfault and I couldn't figure out why - can > any of you help me spot the brain fart? (I've attached the offending code > in bad_stddev_code.txt) > > Yours, > > > Paul > > PS: I'm not on the internals list, so I would appreciate it if you would CC > me on your reply. >
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