search for: ai2

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2007 Jul 31
3
Nonlinear optimization with constraints
Hello R community, I am using R for creating a model using optimization. I would like to ask if there is R-function/package for solving the problem below: Minimize sum(abs(exp^(Ai1 x1 + Ai2 x2 + ... + Aim xm - bi) - 1)), for each i = 1, ..., n. subject to Ai1 x1 + Ai2 x2 + ... + Ajm xm - bi <= c, where c is a scalar. (x is a vector of variables, A is nxm matrix, b is a vector) [[alternative HTML version deleted]]
2005 Sep 01
6
png scaling problem
scaling<-4 xywidth<-480 resolution<-150 png(filename = "c:/r/anschluss/plots/4.png", width = xywidth*scaling, height = xywidth*scaling,pointsize = 12, bg = "white", res = resolution*scaling) ...... barplot(xrow,col = barcolors,cex.axis=scaling, ylab="mean time till attachment in sec",cex.lab=1.2*scaling) I tried to scale the barplot but there is one
2010 Mar 22
1
SQL-select using native R methods ?
Hi I have a problem in R that I have been trying to solve but without success. I am trying to join two tables on two variables : an ID and a date (optional) that will be common between the two tables In SQL (and SAS PROC SQL) I am a frequent user of the "select" command and I am used to the following nomenclature : select a.*, b.c, b.y, b.z from table1 a, table2 b where
2013 Nov 10
0
[linux-3.10 test] 21641: regressions - FAIL
...; Paul Durrant <paul.durrant@citrix.com> Paul Moore <paul@paul-moore.com> Pavel Parkhomenko <ra85551@gmail.com> Roel Kluin <roel.kluin@gmail.com> Russell King <rmk+kernel@arm.linux.org.uk> Rusty Russell <rusty@rustcorp.com.au> Salva Peiró <speiro@ai2.upv.es> Sathya Perla <sathya.perla@emulex.com> Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Seif Mazareeb <seif@marvell.com> Takashi Iwai <tiwai@suse.de> Tony Prisk <linux@prisktech.co.nz> Toralf Förster <toralf.foerster@gmx.de> Vlad Y...
2017 May 19
5
[llvm] r303387 - [InstCombine] add more tests for xor-of-icmps; NFC
[adding llvm-dev for wider audience] On Fri, May 19, 2017 at 12:28 PM, Daniel Berlin <dberlin at dberlin.org> wrote: > > > On Fri, May 19, 2017 at 11:00 AM, Davide Italiano <davide at freebsd.org> > wrote: > >> On Fri, May 19, 2017 at 10:00 AM, Sanjay Patel <spatel at rotateright.com> >> wrote: >> > Is "VRP" (value range