3 replies to this topic

[kobena]

Hello all;

I have the following arrays:

volume_array=(100,200,350,400); and
height_array=(1,5,8,10);

a height_array value corresponds to a value in the volume_array with the same key.

Does someone know how to efficiently get the corresponding volume for a height of 7 assuming a linear relationship?

I have been looking at the php array functions for sometime now without any luck.

[Larry]

This fetches the key from the array where the value is 7:
$key = array_keys($height_array, 7);

Then $volume_array[$key] gets you the value you need.

[kobena]

Thanks Larry for your response.
When i try i get the message "Warning: Illegal offset type"

This i believe is due to the fact that ( i may be wrong though) "7" is not in the height_array it is to be extrapolated between 5 and 8.

[kobena]

Thanks all; i found the solution. Will post it in due course.