[R] able to estimate in the excel but not in R, any suggestion?

[Marna Wagley]

Hi R users,
I was trying to estimate some values in r but could not figure out how to
write the script in r. Although I was able to estimate it correctly in the
excel. For example I have the following data set.

daT<-structure(list(sd = c(0.481, 0.682, 0.741, 0.394, 0.2, 0.655, 0.375),
mcd = c(51.305, 51.284, 51.249, 51.2, 51.137, 51.059, 50.968), ca =
c(49.313, 69.985, 75.914, 40.303, 20.493, 66.905,38.185)), class =
"data.frame", row.names = c(NA, -7L))
head(daT)

In this data set, I need to estimate in the column name "ca", In the excel
I estimated the value using the following formula:
IF(A2>B2*2,PI()*B2^2,((0.5*A2)*SQRT(B2^2-(0.5*A2)^2)+B2^2*ASIN((0.5*A2)/B2))*2)

But when I wrote the following code in the R, it did not work
attach(daT)
daT$ca<-if(sd>mcd*2,pi()*mcd^2,((0.5*sd)*sqrt(mcd^2-(0.5*sd)^2)+mcd^2*asin((0.5*sd)/mcd))*2)

Your suggestion would be highly appreciated.

Sincerely,

MW

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