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...hat are m- and j- specific, e.g., compute X3 where X3 is the sum of X1 of all j in m, and this for each m. The new variable X3 is then added to the data frame (and is the same for all rows with the same m indicator). How can I program this efficiently without running loops? Thanks in advance Jo Reynaerts Ph.D. student LICOS Centre for Institutions and Economic Performance Katholieke Universiteit Leuven Debériotstraat 34/3511 B-3000 Leuven Belgium Jo.Reynaerts@econ.kuleuven.be<mailto:Jo.Reynaerts@econ.kuleuven.be> [[alternative HTML version deleted]]

...s BASIC codes had this (and bounds and masks). However, it takes time and .... For information, I'd like to know if this turns out to be the problem, as it would raise the priority for working on such issues. JN > Message: 57 > Date: Mon, 19 Oct 2009 17:48:12 +0200 > From: "Reynaerts, Jo" <Jo.Reynaerts at econ.kuleuven.be> > Subject: [R] (no subject) > To: "r-help at r-project.org" <r-help at r-project.org> > Message-ID: > <603D249CBE0B304490D0F774142B8E0F01CDCB9A4D68 at ECONSRVEX6.econ.kuleuven.ac.be> > > Content-Type: tex...

...s computed by the contraction mapping using x.in. I used different stopping rules and tolerance levels, but this gives the same result. As I said, I think it's a numerical problem. Has anyone had similar experiences using optim() and could you give some coding advice? Thanks in advance, Jo Reynaerts [[alternative HTML version deleted]]

...one (jo) 77. Re: Accumulating results from "for" loop in a list/array (Schalk Heunis) 78. Is there any "month" object like "LETTERS" ? (megh) 79. Re: Best R text editors? (Patrick Connolly) 80. Constructing variables conditional on two indicators (Reynaerts, Jo) 81. Re: Constructing variables conditional on two indicators (Dimitris Rizopoulos) 82. Re: Linux R version: best? (Patrick Connolly) 83. Re: executing rscript from VB (bartjoosen) 84. how to do this? (Luca Braglia) 85. Re: sppolot: fill below minimum legend value (Paul Hiemstr...