Template:Calculate increment/doc
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What it does
Calculates suitable increments for {{scalemarkers}}. Increments are 1, 2 or 5 times an appropriate power of 10.
Variable 1 = from; Variable 2 = to.
Examples:
"{{calculate increment|10|30}}"
gives "2" [1]
Problems it has
It doesn't deal with small (<10) scales yet.
How it does it
First we need to select the "base value" - i.e. what we're going to multiply by the power of 10. We use the following brackets:
- 14<35: 20
- 35-70 : 50
- 70->14: 10
To generate the first two digits is quite laborious. This code generates a suitably rounded number; we need to divide that by 10 n times.
1 round (2-1)}}
1
Then we need to select the power of 10.
0; 10