search for: approximated

Displaying 20 results from an estimated 2744 matches for "approximated".

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2017 Sep 25
5
bowed linear approximations
...linear approximations, but > maybe "log" approximations? > However, the approximation methods are only "linear" and "constant" .. there > isn't a "log" method to approximate with. > > So can anyone tell me how to fix the code such that he approximated points > DO lie on the line as plotted with the "log=x" plot parameter? > Oh, and they have to be uniformly distributed along the Log=x axis.. I think > that's the tricky part. > > Any help and/or insight would be greatly appreciated. > > Thank you! > -Ri...
2018 Mar 17
2
Clang executable sizes and build stats
Hi all, I recently did a run where I built clang executables on FreeBSD 12-CURRENT [1], from trunk r250000 (2015-10-11) all through r327700 (2018-03-16), with increments of 100 revisions. This is mainly meant as an archive, for easily doing bisections, but there are also some interesting statistics. From r250000 through r327700: * the total (stripped) executable size grew by approximately 43% *
2011 Feb 18
3
Confidence Intervals on Standard Curve
Hi, I wonder if anyone could advise me with this: I've been trying to make a standard curve in R with lm() of some standards from a spectrophotometer, so as I can express the curve as a formula, and so obtain values from my treated samples by plugging in readings into the formula, instead of trying to judge things by eye, with a curve drawn by hand. It is a curve and so I used the
2017 Sep 26
0
bowed linear approximations
...gt; > maybe "log" approximations? > > However, the approximation methods are only "linear" and "constant" .. > there > > isn't a "log" method to approximate with. > > > > So can anyone tell me how to fix the code such that he approximated > points > > DO lie on the line as plotted with the "log=x" plot parameter? > > Oh, and they have to be uniformly distributed along the Log=x axis.. I > think > > that's the tricky part. > > > > Any help and/or insight would be greatly appreciat...
2017 Sep 25
0
bowed linear approximations
...what I want to do is NOT linear approximations, but maybe "log" approximations? However, the approximation methods are only "linear" and "constant" .. there isn't a "log" method to approximate with. So can anyone tell me how to fix the code such that he approximated points DO lie on the line as plotted with the "log=x" plot parameter? Oh, and they have to be uniformly distributed along the Log=x axis.. I think that's the tricky part. Any help and/or insight would be greatly appreciated. Thank you! -Rich [[alternative HTML version deleted...
2015 Jan 12
3
[LLVMdev] NP-hard problems in the LLVM optimizer?
Hi all. I’ve heard a couple of times that some of the problems solved by various passes in the optimizer are indeed NP-hard, even though the instances are small enough to be tractable (and very quickly). Is this true? If so, which are these problems? Register allocation? Instruction scheduling? Are they solved exactly or by approximations? Or not solved at all (the need of solving them is
2009 Apr 06
2
approximation function
Hi, Having a set of values (non-time series data), what are the approximation functions that could determine the trend of the values? Cheers, Carol [[alternative HTML version deleted]]
2018 Mar 17
0
[cfe-dev] Clang executable sizes and build stats
Thanks for raising this. This is something we've recently been looking at too at Sony, as over the course of PS4's lifetime so far we've seen our clang executable on Windows approximately double in size, which isn't ideal for things like distributed build systems. A graph of clang.exe size on our internal staging branch matches yours closely with it being more of a death by a
2006 Jan 31
1
approximation to ln \Phi(x)
I am using pnorm() with the log.p=T argument to get approximations to ln \Phi(x) and qnorm with the log.p=T argument to get estimates of \Phi^{-1}(exp(x)). What approximations are used in these two functions (I noticed in the source pnorm.c it doesn't look like Abramowitz and Stegen) and where can I find the citation? Thanks, Richard Morey
2018 Mar 17
2
[cfe-dev] Clang executable sizes and build stats
I'm sure the x86 scheduler models are causing bloat. Every time a single instruction appears on a line by itself like this in a scheduler model: def: InstRW<[SBWriteResGroup2], (instregex "ANDNPDrr")>; It causes that instruction to be its own group in the generated output. And its replicated for each CPU. We should look into better using regular expressions or taking
2011 May 15
5
Question on approximations of full logistic regression model
Hi, I am trying to construct a logistic regression model from my data (104 patients and 25 events). I build a full model consisting of five predictors with the use of penalization by rms package (lrm, pentrace etc) because of events per variable issue. Then, I tried to approximate the full model by step-down technique predicting L from all of the componet variables using ordinary least squares
2017 Sep 26
0
bowed linear approximations
...gt; plot(freq,mag,type="b",log="x"); for(i in 1:200){ xx <- > exp(runif(1,log(min(freq)),log(max(freq)) )); yy <- approx(freq,mag,xout=xx, > method = "linear"); points(xx,yy$y,col=rgb(1,0,0)); } > > For completeness, I have been puzzling over why the approximated points > don't lie linearly over the original data set (especially prominent in the bow > between freq=10 and 50). Once I realized (and concurred with) why this bow > exists, I have been struggling with how to make these approximations as > expected.. In my original post, I think I...
2018 Mar 21
0
[cfe-dev] Clang executable sizes and build stats
> On Mar 17, 2018, at 4:04 PM, Craig Topper via cfe-dev <cfe-dev at lists.llvm.org> wrote: > > I'm sure the x86 scheduler models are causing bloat. Every time a single instruction appears on a line by itself like this in a scheduler model: > > def: InstRW<[SBWriteResGroup2], (instregex "ANDNPDrr")>; > > It causes that instruction to be its own
2018 Mar 22
1
[cfe-dev] Clang executable sizes and build stats
I just knocked ~400k off the size of the x86 scheduler tables by reducing from 5k+ entries to 2k+ entries per cpu. ~Craig On Tue, Mar 20, 2018 at 6:34 PM, Andrew Trick <atrick at apple.com> wrote: > > > On Mar 17, 2018, at 4:04 PM, Craig Topper via cfe-dev < > cfe-dev at lists.llvm.org> wrote: > > I'm sure the x86 scheduler models are causing bloat. Every time
2010 Nov 24
0
Laplace Approximation
Does anyone have any R code that shows how to do a Laplace Approximation? I know there are a variety of these numerical approximation algorithms and I'm pretty open at this point, I'm just curious how it's approximated in R code. I have seen some functions in packages, but I think they all call C code, and am looking for an example in R only. Thanks. -- View this message in context: http://r.789695.n4.nabble.com/Laplace-Approximation-tp3058004p3058004.html Sent from the R help mailing list archive...
2007 Oct 09
2
AlgDesign--exact and approximate design
Hi I am trying to generate a design using Algdesign and came across terms of "exact design" and "approxiamte theory design", I did not find a reference to explain what they are, could some one shed some light about this on me? Another question is, I want to measure the main effects and at least two interactions, variables are factors, how do I ensure this in formula,
2011 Dec 07
2
How to scale arrows to approximately fill a plot region?
In a variety of graphic applications, I plot some data, together with arrows representing variables or linear transformations of variables as vectors in the same space, as in a biplot. In my applications, the scale of the arrows is arbitrary -- all that matters is relative length. I'd like to blow them up or shrink them to fit the available space in the plot. The origin is typically at
2007 Nov 30
2
lmer and method call
Hello all, I'm attempting to fit a generalized linear mixed-effects model using lmer (R v 2.6.0, lmer 0.99875-9, Mac OS X 10.4.10) using the call: vidusLMER1 <- lmer(jail ~ visit + gender + house + cokefreq + cracfreq + herofreq + borcur + comc + (1 | code), data = vidusGD, family = binomial, correlation = corCompSymm(form = 1 | ID), method = "ML") Although the model fits, the
2004 Sep 09
1
Blom's approximation to rankits?
Hello, My name is Lisa and I'm a statistician at Princess Margare Hospital. I wonder if there is any function in R that calculate the Normal rankits based on Blom's approximation? Thank you very much Lisa Wang Msc. Princess Margaret hospital Toronto, Ca
2006 Feb 15
3
wilcox.test returned estimates
Hi all, I have being using wilcox.test to test for differences between 2 independent samples. I had understood the difference in location to be conventionally the difference in the sample medians however this is not the case when implemented in R. I have tied ranks and therefore non-exact p-value and confidence intervals are calculated due to the normal approximation. But what exactly is this