Transform that allows condition
Defines new variables under condition for data frame
dtransform(data, ...)
data |
is data frame |
... |
new variable definitions including possible if condition |
data(mena) xx <- dtransform(mena,ll=log(agemena)+twinnum) xx <- dtransform(mena,ll=log(agemena)+twinnum,agemena<15) xx <- dtransform(xx ,ll=100+agemena,ll2=1000,agemena>15) dsummary(xx,ll+ll2~I(agemena>15))
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