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 Home Brew Forums > pH for dummies?
12-03-2012, 08:36 PM   #21
jmf143
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Quote:
 Originally Posted by SpeedYellow LOL, you got me there AJ. Had to learn Fortran for my bsme in late 80s/early 90s. I was trying to think Excel but apparently came out Fortran . . .
Excel does use RAND(), though it can also be typed rand().
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12-04-2012, 07:20 AM   #22
W0rthog
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Is there such thing as random in computing? The number must be derived from somewhere.

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12-04-2012, 01:27 PM   #23
ajdelange
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No, and the more correct terminology is 'pseudo random'. A good PRN generator will produce, on subsequent calls, a sequence of numbers that have many of the properties of truly random numbers such as statistical independence and an autocorelation function which is 0 (except at 0 lag). But while a modern generator will produce very long runs, eventually the sequence will repeat.

The sequences are also pseudo random in the sense that you can get the same sequence every time by 'seeding' the generator with the same initial state. The seed goes in the parentheses e.g. RAND(seed) at the first call. RAND will produce the same set of 1000 numbers for each sequence you generate in which the first call uses the same seed.

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12-04-2012, 02:13 PM   #24
afr0byte
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One could always use this: http://www.fourmilab.ch/hotbits/. It's very slow, though.

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12-05-2012, 02:12 PM   #25
liquiditynerd
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Ah ouai, je comprend ca, amigo. Cest tres different tambein, eh. Yo soy confused. Danke sohn.

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12-05-2012, 02:13 PM   #26
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Quote:
 Originally Posted by liquiditynerd Ah ouai, je comprend ca, amigo. Cest tres different tambein, eh. Yo soy confused. Danke sohn.
sohn = schoen?
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12-05-2012, 03:52 PM   #27
RobertRGeorge
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Quote:
 Originally Posted by afr0byte sohn = schoen?
sohn = Societie Officiale de Hombrew Naturelle
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