Regtest for only dumping masses or charges

regtest/basic/rt16b/mcnew_onlycharges.reference

+#! FIELDS index charge
+ 0                    0.5
+ 1                    0.5
+ 2                    0.5
+ 3                    0.5
+ 4                    0.5
+ 5                   -0.5
+ 6                   -0.5
+ 7                   -0.5
+ 8                   -0.5
+ 9                   -0.5
+ 10                   -2.5
+ 11                   -3.5
+ 12                   -4.5
+ 13                   -5.5
+ 14                   -6.5
+ 15                   -7.5
+ 16                      0
+ 17                      0
+ 18                      0
+ 19                      0
+ 20                      0
+ 21                      0
+ 22                      0
+ 23                      0
+ 24                      0
+ 25                      0
+ 26                      0
+ 27                      0
+ 28                      0
+ 29                      0
+ 30                      0
+ 31                      0
+ 32                      0
+ 33                      0
+ 34                      0
+ 35                      0
+ 36                      0
+ 37                      0
+ 38                      0
+ 39                      0
+ 40                      0
+ 41                      0
+ 42                      0
+ 43                      0
+ 44                      0
+ 45                      0
+ 46                      0
+ 47                      0
+ 48                      0
+ 49                      0
+ 50                      0
+ 51                      0
+ 52                      0
+ 53                      0
+ 54                      0
+ 55                      0
+ 56                      0
+ 57                      0
+ 58                      0
+ 59                      0
+ 60                      0
+ 61                      0
+ 62                      0
+ 63                      0
+ 64                      0
+ 65                      0
+ 66                      0
+ 67                      0
+ 68                      0
+ 69                      0
+ 70                      0
+ 71                      0
+ 72                      0
+ 73                      0
+ 74                      0
+ 75                      0
+ 76                      0
+ 77                      0
+ 78                      0
+ 79                      0
+ 80                      0
+ 81                      0
+ 82                      0
+ 83                      0
+ 84                      0
+ 85                      0
+ 86                      0
+ 87                      0
+ 88                      0
+ 89                      0
+ 90                      0
+ 91                      0
+ 92                      0
+ 93                      0
+ 94                      0
+ 95                      0
+ 96                      0
+ 97                      0
+ 98                      0
+ 99                      0
+ 100                      0
+ 101                      0
+ 102                      0
+ 103                      0
+ 104                      0
+ 105                      0
+ 106                      0
+ 107                      0

regtest/basic/rt16b/mcnew_onlymasses.reference

+#! FIELDS index mass
+ 0                      2
+ 1                      2
+ 2                      2
+ 3                      2
+ 4                      2
+ 5                      1
+ 6                      1
+ 7                      1
+ 8                      1
+ 9                      1
+ 10                      2
+ 11                      3
+ 12                      4
+ 13                      5
+ 14                      6
+ 15                      7
+ 16                      1
+ 17                      1
+ 18                      1
+ 19                      1
+ 20                      1
+ 21                      1
+ 22                      1
+ 23                      1
+ 24                      1
+ 25                      1
+ 26                      1
+ 27                      1
+ 28                      1
+ 29                      1
+ 30                      1
+ 31                      1
+ 32                      1
+ 33                      1
+ 34                      1
+ 35                      1
+ 36                      1
+ 37                      1
+ 38                      1
+ 39                      1
+ 40                      1
+ 41                      1
+ 42                      1
+ 43                      1
+ 44                      1
+ 45                      1
+ 46                      1
+ 47                      1
+ 48                      1
+ 49                      1
+ 50                      1
+ 51                      1
+ 52                      1
+ 53                      1
+ 54                      1
+ 55                      1
+ 56                      1
+ 57                      1
+ 58                      1
+ 59                      1
+ 60                      1
+ 61                      1
+ 62                      1
+ 63                      1
+ 64                      1
+ 65                      1
+ 66                      1
+ 67                      1
+ 68                      1
+ 69                      1
+ 70                      1
+ 71                      1
+ 72                      1
+ 73                      1
+ 74                      1
+ 75                      1
+ 76                      1
+ 77                      1
+ 78                      1
+ 79                      1
+ 80                      1
+ 81                      1
+ 82                      1
+ 83                      1
+ 84                      1
+ 85                      1
+ 86                      1
+ 87                      1
+ 88                      1
+ 89                      1
+ 90                      1
+ 91                      1
+ 92                      1
+ 93                      1
+ 94                      1
+ 95                      1
+ 96                      1
+ 97                      1
+ 98                      1
+ 99                      1
+ 100                      1
+ 101                      1
+ 102                      1
+ 103                      1
+ 104                      1
+ 105                      1
+ 106                      1
+ 107                      1

regtest/basic/rt16b/plumed.dat

 # this is just to check if charges are read properly from mc file
 DUMPMASSCHARGE FILE=mcnew
 
+DUMPMASSCHARGE ONLY_MASSES FILE=mcnew_onlymasses
+DUMPMASSCHARGE ONLY_CHARGES FILE=mcnew_onlycharges
+
 c1: CENTER MASS ATOMS=1-10
 c2: CENTER MASS ATOMS=11-20
 d:  DISTANCE ATOMS=c1,c2