|
Size: 1845
Comment:
|
Size: 1838
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 5: | Line 5: |
| Note that the below macros demonstrate how to operate on externally declared macros (e.g. `define !year() 2021 !enddefine`). If passing a value into a macro as an argument, the `!eval()` call can be eliminated. | Note that the below macros demonstrate how to operate on externally declared macros (e.g. `define !year() 2021 !enddefine`). If passing a value into a macro as an argument, the `!EVAL` can be eliminated. |
SPSS Macro Arithmetic
SPSS macros do not offer any numeric functions or operators directly, but certain forms of arithmetic can be hacked with string functions.
Note that the below macros demonstrate how to operate on externally declared macros (e.g. define !year() 2021 !enddefine). If passing a value into a macro as an argument, the !EVAL can be eliminated.
Contents
Addition
!a + 1
define !main()
*Short.
!let !c = !length(!concat(!blanks(!eval(!a)), !blanks(1)))
*Readable.
!let !c = !length(
!concat(
!blanks(!eval(!a)),
!blanks(1)
)
)
!enddefine
!a + !b
define !main()
*Short.
!let !c = !length(!concat(!blanks(!eval(!a)), !blanks(!b)))
*Readable.
!let !c = !length(
!concat(
!blanks(!eval(!a)),
!blanks(!eval(!b))
)
)
!enddefine
Subtraction
!a - 1
define !main()
*Short.
!let !c = !length(!substr(!blanks(!eval(!a)),2))
*Readable.
!let !c = !length(
!substr(
!blanks(!eval(!a)),
2
)
)
!enddefine
!a - !b
define !main()
*Short.
!let !c = !length(!substr(!blanks(!eval(!a)),!length(!concat(!blanks(!eval(!b)),!blanks(1)))))
*Readable.
!let !c = !length(
!substr(
!blanks(!eval(!a)),
!length(
!concat(
!blanks(!eval(!b)),
!blanks(1)
)
)
)
)
!enddefine
Multiplication
!a * !b
define !main()
!let !sum = !blanks(0)
!do !x = 1 !to !eval(!a)
!let !sum = !concat(!sum, !blanks(!eval(!b)))
!doend
!let !c = !length(!sum)
!enddefine