In addition: There were 21 warnings (use warnings() to see them)
> warnings()
Komunikaty ostrzegawcze:
1: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
2: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
3: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
4: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
5: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
6: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
7: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
8: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
9: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
10: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
11: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
12: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
13: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
14: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
15: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
16: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
17: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
18: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
19: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
20: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf
21: In max(MF.temp[m, ], na.rm = TRUE) :
  no non-missing arguments to max; returning -Inf