Re: [R] Centered difference operation on matrix with R

Dear list members, The answer is in package "pracma", function "gradient". Regards, Pascal Oettli On Fri, Mar 28, 2014 at 2:51 PM, Pascal Oettli wrote: > Dear list members, > > I am wondering whether there is any more efficient way to calculate > centered difference on matrix in R? Please see h

[R] Centered difference operation on matrix with R

Dear list members, I am wondering whether there is any more efficient way to calculate centered difference on matrix in R? Please see herewith an example: lon <- matrix(rep(seq(0,2,length.out=1e3), 1e3), 1e3, 1e3) lat <- matrix(rep(seq(0,2,length.out=1e3), each=1e3), 1e3, 1e3) x <- matrix(rep(seq