Hi I'm new to R programming and trying to write program for Reverse and
Complementary Base. the objective is to Design A DNA primer. So I have a DNA
sequence with base A T C G and A complement to T; T=A;C=G;G=C. I just figure
out How to Reverse It Already. but for the Complement i can only make it answer
for just 1 base but cant be all of the sequence. and i dont know how to
combine reverse and complement function. here is my code and im totallt confuse
with it. Cn someone help me with this problem? You will be my life savior!
thank you! strReverse <- function(x) sapply(lapply(strsplit(x, NULL), rev),
paste, collapse="") strReverse(c("ATCGGTCAATCGA")) complement.base =
function(base){ if(base == 'A' | base == 'a') print("T") if(base == 'T'
| base == 't') print("A") if(base == 'G' | base == 'g') print("C") if(base
== 'C' | base == 'c') print("G")} complement.base(base="A")
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