In pyferret 7.5 : yes? LET lon=I[I=1:10]*36 yes? LIST MOD(lon ,360), MOD(lon-360,360), MOD(lon-720,360), MOD(lon+360,360) X: 0.5 to 10.5 Column 1: EX#1 is MOD(LON ,360) Column 2: EX#2 is MOD(LON-360,360) Column 3: EX#3 is MOD(LON-720,360) Column 4: EX#4 is MOD(LON+360,360) EX#1 EX#2 EX#3 EX#4 1 / 1: 36.0 -324.0 -324.0 36.0 2 / 2: 72.0 -288.0 -288.0 72.0 3 / 3: 108.0 -252.0 -252.0 108.0 4 / 4: 144.0 -216.0 -216.0 144.0 5 / 5: 180.0 -180.0 -180.0 180.0 6 / 6: 216.0 -144.0 -144.0 216.0 7 / 7: 252.0 -108.0 -108.0 252.0 8 / 8: 288.0 -72.0 -72.0 288.0 9 / 9: 324.0 -36.0 -36.0 324.0 10 / 10: 0.0 0.0 -0.0 0.0 The result of EX#2 and EX#3 puzzles me. From what I remember from my math studies, the MOD function should return a result in the interval [0,360[. All EX#s should print the same result than EX#1 and EX#4. Is this a bug or a feature ? If this is a feature, it should be at last documented. And another MOD function with the "correct" behaviour would be strongly appreciated ;-) Olivier — Olivier Marti - LSCE Bât 714 p. 1049 MERMAID Team Normal situation : +33 1 69 08 77 27 Corona lockdown : +33 6 45 36 43 74 |
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