[R] inverse cumsum

[Alfredo Alessandrini]

I've a matrix like this:

1985     1.38     1.27     1.84     2.10     0.59     3.47
1986     1.05     1.13     1.21     1.54     0.21     2.14
1987     1.33     1.21     1.77     1.44     0.27     2.85
1988     1.86     1.06     2.33     2.14     0.55     1.40
1989     2.10     0.65     2.74     2.43     1.19     1.45
1990     1.55     0.00     1.59     1.94     0.99     2.14
1991     0.92     0.72     0.50     1.29     0.54     1.22
1992     2.15     1.28     1.23     2.26     1.22     3.17
1993     1.50     0.87     1.68     1.97     0.83     2.55
1994     0.69     0.00     0.76     1.89     0.60     0.87
1995     1.13     1.04     1.19     1.52     1.13     1.78

Can I utilise a cumsum inverse? from 1995 to 1985?


Thank you,

Alfredo