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angara
2000 Oct 27
0
R reference card
...jects.
{\tt rm(object)}: removes objects
{\tt dim(matrix)}: dimensions of a matrix
{\tt dimnames(x)}: names of dimensions
{\tt length(vector)}: length of a vector
{\tt 1:3}: is the vector {\tt 1,2,3}
{\tt rep(x,n)}: repeats the vector {\tt x n} times
{\tt c(1,2,3)}: creates the same vector
\hangpara{2em}{1}{\tt cbind(a,b,c), rbind()}: binds columns or
rows into a matrix
{\tt merge}: merge data frames
{\tt matrix(numbers,rows,colmuns)}: creates a matrix
{\tt data.frame(vector list)}: makes a data frame
\hangpara{2em}{1}{\tt as.factor(), as.matrix(), as.vector()}: conversion
\hangpara{2em}{...