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This is an small example of how my actual SPSS data file looks like:

Group Meas1 Meas2
1,00 20,00 50,00
1,00 20,00 50,00
1,00 20,00 50,00
2,00 40,00 45,00
2,00 40,00 45,00
2,00 40,00 45,00
3,00 10,00 40,00
3,00 10,00 40,00
3,00 10,00 40,00
4,00 20,00 35,00
4,00 20,00 35,00
4,00 20,00 35,00

I would like to calculate the difference between 'Meas1' from 'Group' 1 and 'Meas2' from 'Group' 2, the difference between 'Meas1' from 'Group' 2 and 'Meas2' from 'Group' 3 and the difference between 'Meas1' from 'Group' 3 and 'Meas2' from 'Group' 4. The answers of these calculations would be 45-20 = 25, 40-40 = 0 and 35-10 = 25. But how do I perform these calculations in SPSS? Or what is the syntax for this type of calculation? Does anyone know? Many thanks in advance!
  maandag 8 januari 2018 @ 20:44:54 #2
85514 ralfie
!Yvan eht nioj
pi_176374430
I guess you can start with a split file

https://libguides.library.kent.edu/SPSS/SplitData
pi_176647910
one approach would be to construct new variables first (e.g. meas12). Values to be based on the right group and meas combo as outlined above. After that a simple compare means will do the trick.
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