[SOLVED] Percentage

[Minase]

anyone know how i can do this thing?

i have 0 and 1 and 1 has just a 2 % procent of  coming as result,0 has 98 (it come almoust everytime)

anyone know how to do it?thanks

[unkwntech]

If your talking about using weighted random, where one number occurs, more often then the other then I can help but I don't understand your question.

[Minase]

first lets say i have 2 variables

$a = 0;

$b = 1;

$ap = 2;  // variable $a procent

$bp = 98 // variable $b procent

 

i want a random result ,but based on defined procent

like

rand(0,1); and 0 to have 2% chance and 1 98%

thank you

[unkwntech]

This is a weighted random, I'll post back in a few minutes, I have a function for this, but I need to find it.

[Minase]

ok thank you very much

[Barand]

<?php
$ar = array (0,0);
$ar = array_pad($ar,100,1);

shuffle($ar);

for ($i=0; $i<50; $i++)
{
    if ($ar[array_rand($ar)]==1)
    {
        echo "1", '<br/>';
    }
    else echo "0", '<br/>';
}
?>

[corbin]

Couldn't you just do:

 

<?php
$r = rand(0, 99);
$number = ($r < 2) ? 0 : 1;

 

 

There are 2 numbers less than 2 (0 and 1), therefore 2/100 = 2% chance.

There are 98 numbers not less (in other words, greater than or equal to) than 2, so there's a 98% chance of 1.

 

 

Or is this way not random enough or something?

[Minase]

thanks