Addition
Adding Intervals together is rather easy. To add Intervals together simply add the lowest X value together with the lowest Y value, then add the highest X value with the highest Y value.
| X Values:
| [a,b]
|
| Y Values:
| [c,d]
|
When calculating Intervals the X values are placed "on top of" the Y values. Also the lowest value of either the X of the Y is placed first in the set. When adding you are adding a+c and b+d.
| X Values:
|
| [a,b]
|
| Y Values:
| +
| [c,d]
|
| Result:
|
| [e,f]
|