[R] matrix indexing/subset error

Carl Sutton suttoncarl at ymail.com
Mon May 30 20:38:46 CEST 2016

Hi Guru's
In my quest to understand R I have what I thought was a simple exercise that now has me baffled.  Why the error message after running this code?  I am totally baffled by the error message.  I was expecting rows 1 and 3 of the x matrix to be returned, and have not a clue as to why this becomes a subscript difficulty.  The manual was of no help in this matter.

x <- c(1:3,2:4)
x  <- matrix(x, nrow = 3)
z <- c(1:4,1,1,0,0,1,0,1,0)
z <- matrix(z, ncol = 3)
x[x[,2]>= 3,]
z %% 2 == 1
x[z %% 2 == 1,]Error in x[z%%2 == 1, ] : (subscript) logical subscript too long
Many thanks for your assistance.
Carl Sutton CPA

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