Hi all,

I have a data set which treat missing value as NA and now I need to replace
all these NA's by using number in the same row but different column.

Here is the part of my data:
 V1 V2 V3 V4 V5 V6 V7  0 0 0 1.2 0 0 0.259  0 0 12.8 0 23.7 0 8.495  6 0
81.7 0.2 0 20 19.937  0 1.5 60.9 0 0 15.5 13.900  1 13 56.8 17.5 32.8 6.4
27.654  4 3 66.4 2 0.3 NA 17.145


I want to replace (V6, 6) with (V7, 6). I have about 1000 NA's in V6 which
I want to replace  with the same row in V7. The other values in V6, I want
to keep remain the same.

How to achieve this? Assuming my data is called "Targetstation",  I have
tried this:

Targetstation <- within(Targetstation, v6 <- replace(v6, is.na(v6), v7[is.na
(v6)]))

But R gives me this:

Warning messages:

1: In is.na(v6) : is.na() applied to non-(list or vector) of type 'NULL'

2: In is.na(v6) : is.na() applied to non-(list or vector) of type 'NULL'


How to solve this?

Thank you in advance.

Regards,

Dila.

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