Array from for loop?

[MikeUK]

I need some help please.  All the tutorials I've seen tell you how to search an array using a loop, but how do you create an array from the following?

 

for ($a = 0; $a <= 100; $a ++) {

for ($b = 0; $b <= 50; $b ++) {

 

                //Put each value of $b and each value $a into an array

                  $new_array[$a][$b]= $x // Doesn't work!

 

                }

}

 

What I'm trying to do is create an array of all the $a values and $b values and then get an average for each set. Any array I try to create inside the loop is storing only one value. The next iteration is overwriting it like it would a variable.  Any ideas? I'd really appreciate any help.

 

Thanks

Mike

[jonsjava]

Declare the array first

<?php
$new_array = array();
for ($a = 0; $a <= 100; $a ++) {   
      for ($b = 0; $b <= 50; $b ++) {

                //Put each value of $b and each value $a into an array
                  $new_array[$a][$b]= $x // Doesn't work!

                }
}

[MikeUK]

Done that it still doesn't work

[sasa]

add ; after $x

<?php
$new_array = array();
for ($a = 0; $a <= 100; $a ++) {   
      for ($b = 0; $b <= 50; $b ++) {

                //Put each value of $b and each value $a into an array
                  $new_array[$a][$b]= $x; // Doesn't work!

                }
}

[morph07]

<?php
$new_array = array();
for ($a = 0; $a <= 100; $a ++) 
{   
      for ($b = 0; $b <= 50; $b ++) 
      {
            $new_array[$a]=$b;    
       }
}
?>

 

[BlueSkyIS]

oh my. if what you really want to do is "create an array of all the $a values and $b values and then get an average for each set":

 

<?php
$array_a = array();
$array_b = array();
for ($a = 0; $a <= 100; $a ++) {   
$array_a[] = $a;
}

for ($b = 0; $b <= 50; $b ++) {   
$array_b[] = $b;
}

echo "Average of array_a is ".array_sum($array_a)/count($array_a)."<BR>";
echo "Average of array_b is ".array_sum($array_b)/count($array_b)."<BR>";
?>

[MikeUK]

Thanks to you all for taking the time to reply    I did manage to do it after reading through a library book and did it in pretty much the same way as the last example.

 

Thanks again!