/usr/share/gretl/scripts/ps2-1.inp is in gretl-common 2016a-1.
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1 2 3 4 5 6 7 | # PS2.1 using DATA2-1, illustrating frequency distributions, Section 2.1
open data2-1
help freq
# Because SHAZAM and gretl have different command structures, the outputs
# don't correspond exactly
freq vsat
freq msat
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