I'm a beginner with R.
I have two vectors in character format. I tried to get the intersection of
these two vectors using intersect£¨£©. But there is no result. The process is
below:
> a<-c("CREB2¡± ,¡°ELK1¡± ,¡°ELK4¡± ,¡°MYC¡± ,¡°NR4A1¡± ,¡°FOS¡± ,¡°SRF¡±
> ,¡°TAU¡± ,¡°STMN1¡± ,¡°CPLA2")> a[1] "CREB2¡± ,¡°ELK1¡± ,¡°ELK4¡± ,¡°MYC¡±
> ,¡°NR4A1¡± ,¡°FOS¡± ,¡°SRF¡± ,¡°TAU¡± ,¡°STMN1¡± ,¡°CPLA2">
> b<-c("CAMK2¡±,¡°CPKC¡±,¡°CBL¡±,¡°STAT5A¡±,¡°FAK¡±,¡°ABL1¡±,¡°JUN¡±,¡°ELK1¡±,¡°MYC")>
> b[1]
> "CAMK2¡±,¡°CPKC¡±,¡°CBL¡±,¡°STAT5A¡±,¡°FAK¡±,¡°ABL1¡±,¡°JUN¡±,¡°ELK1¡±,¡°MYC">
> intersect(a,b)character(0)
However when I tried intersect£¨£©with another two vectors, it works. The
example is like this:
> c<-c("a", "b", "e", "c", "e", "f")> c[1] "a" "b" "e" "c" "e" "f"> d<-c("a",
> "g", "f", "b", "e")> d[1] "a" "g" "f" "b" "e"> intersect(c,d)[1] "a" "b" "e"
> "f"
I think something must be wrong in my way with first two vectors(a,b). Could
anyone give me a kind help to tell me the reason for that? Thank you very much.
Hui Xue
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