Standard Deviation of a matrix
Hi
Hi! The sample below should give you what you want: M = matrix(runif(100), 10, 10) sd(as.numeric(M)) So the as.numeric command is the key. It transforms the matrix to a 1D vector. Or alternatively without using as.numeric: M = matrix(runif(100), 10, 10) M dim(M) = 100
or dim(M)<-NULL
M sd(M) Here I use the dim command to set the dimensions to a vector of 100
long.
cheers, Paul On 08/02/2011 11:07 AM, chakri wrote:
Hello, My R knowledge could not take me any further, so this request ! I have a matrix of dimensions (1185 X 1185). I want to calculate
standard
deviation of entire matrix.
sd function of {stats} calculates standard deviation for each
row/column,
giving 1 X 1185 matrix as result. I would like to have 1 X 1 matrix as result. Any ideas, how to do this ? TIA Chakri -- View this message in context: http://r.789695.n4.nabble.com/Standard-
Deviation-of-a-matrix-tp3711991p3711991.html
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