Dear R-helpers,

I have two rows in my dataframe:

ID    VALUE
1A    10
1B    15

and I would like to combine these two rows into a single (new) row in my
dataframe:

ID    VALUE
1    25

...simply by specifying a new value for ID and summing the two VALUES.

I have been trying to do this with with rbind, but it's not working.

I'd appreciate any pointers.

Thanks, Mark Na

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