[R] Question on meaning of '%+%', '%?%' (? = various single letter) in code

and it failed to work! I loaded xts package (must have xts and zoo installed b/c xts has a dependency on zoo.) Entered the following: > library(xts) > data(sample_matrix) > x1 <- sample_matrix > x1 > x3 <- x1 %/% x1 > x3 > x4 <- x1 %+% x1 MH (Mike Hilt comment): After ente

[R] Can't read xlsx file into R. Seem, Seem to have XLConnect loaded.

t; OlPrcFl <- loadWorkbook(“Oil Dly YTD1204 v01.xlsx”, create = FALSE) Error: unexpected input in "OlPrcFl <- loadWorkbook(“" I can read an xlsx file in when I do: > OlPrcFl <- loadWorkbook(file.choose()) That is not a real, long-term sol