22.5 Mean

The connection function Mean calculates the arithmetic mean value for each unit over more than one selected file for each unit.NODATA values are excluded from the calculation.

1 ∑n x +x + x + x + ...+ x ¯x = -- xi =-1----2---3---4--------n n i=1 n
(7)

Optionally relative values can be calculated as a percentage of the mean in relation to one of the selected files according to the formula

( ) ( ) 1∑n -1 x1 +-x2 +-x3-+-x4 +-...+-xn 1- ¯xrel = n xi ⋅xi ⋅100 = n ⋅xi ⋅100 i=1
(8)

22.5.1 The Mean Settings Dialog

As a default mean values are calculated. Check the box for relative values and select the relative source to calculate relative values.

[Picture]

Figure 72: Mean Properties Dialog