Hi, 


My data.frame "A" has FID like this

FID

a

a
b
b
b
c
c
d
d
d
d

Now my second data.frame "B" has age value for a, b, c, d like

FID Age

a      5

b      7
c      9
d      3

How can search for the Age column in "B" and replace the values in "A" so that my new "A" looks like this

FID Age

a      5
a      5
b      7
b      7
b      7
c      9
c      9
d      3
d      3
d      3
d      3

Thanks you

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