[R] Issue with Transform function in R

[Bhaskar Mitra]

Hello Everyone,


I am trying to replace the values in the 2nd column (Variable 1)
corresponding to certain dates  (Date)


with NAs as shown below. Both Date and Variable1 are numeric vectors . I am
trying to use the transform function


as shown below but it doesn’t seem to work even though if I am not getting
any error


Any suggestions/help in this regard?

regards,

---------------------------------------------------------------------------------------------------------------------------------------------------------



Df1 <- data.frame(Date, Variable1)




a1 <- transform(Df1, ifelse(Date  > "010301000300 " && Date <
"010501000300", Variable1 ==NA, Variable1))


Original Data frame



     Date                          Variable1

010101000300                     1

010201000300                     2

010301000300                     3

010401000300                     4

010501000300                     5

010601000300                     6

010701000300                     7

 .

.

.

……….




Transformed data frame (i hope to transform)



      Date                       Variable1

010101000300                    1

010201000300                    2

010301000300                   NA

010401000300                   NA

010501000300                    NA

010601000300                    6

010701000300                    7



……….

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