search for: ghellmund

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2010 May 30
1
Calling fft from C
Hi I have made a R function 'convolve2' for convolution of two real valued vectors based on Rs 'convolve' with option type="open" - see below. (exp.length and irf.length are variables set in another part of the program) I wish to implement the function convolve2 in C and use it in a function used from R with .Call - e.g. I need to call fft in C. All I can find in the
2005 Dec 19
0
Guide - install Rcmdr and JGR on (SUSE) Linux
Hi! I have made a guide describing how to install Rcmdr and JGR on SUSE 10.0. Here it is: http://www.hellmund.dk/RSUSEGUI.html If you have installed R on SUSE with the package found on CRAN - and all the packages on my list was present at the time of installation of R - it might not be necessary to install R from source - give me some feedback on this, please! I might extend the guide to
2005 Apr 29
2
Subarrays
Define an array > v<-1:256 > dim(v)<-rep(4,4) Subarrays can be obtained as follows: > v[3,2,,2] [1] 71 87 103 119 > v[3,,,2] [,1] [,2] [,3] [,4] [1,] 67 83 99 115 [2,] 71 87 103 119 [3,] 75 91 107 123 [4,] 79 95 111 127 In the general case this procedure is very tedious. Given an array A, dim(A)=(dim_1,dim_2,...,dim_d) and two vectors