View source for User:Eleanorg/Thematic1.1/Manipulate Longitude 2 - percent

Converts any number within a given range into a percentage value, based on its position within the range.
In this case, the number is a longitude value, which is converted to an integer between 12528 and 41285.

Heavily commented for your viewing pleasure.
<script type=python>
import re


### convert longitude into 5 digit integer
longitude = str(001.2528) 			# must be a string for regex to work
longint = int(re.sub("\.", "", longitude)) 	# removes decimal point and converts back to an integer

### convert integer into percentage of given range
# converts longitude into a percentage, where 1.2528 = 0% and 4.1285 = 100%
# range between numbers is 28703, so 1% of range is 28703/100 ---> 287.03. Longitude equivalent to 1% will be 12528 + (28703/100)
# thus to convert longitude to percentage, work out its distance from 12528 and divide this distance by 287.03.
percent = int((longint - 12528) / 287.03)
</script>