search for: 4x3

I have the following data frame: > foo w x y z n 1.51550092 1.4337572 1.2791624 1.1771230 q 0.09977303 0.8173761 1.6123402 0.1510737 r 1.17083866 1.2469347 0.8712135 0.8488029 What I want to do is to change it into : > newdf 1 n w 1.51550092 2 q w 0.09977303 3 r w 1.17083866 4 n x 1.43375725 5 q x 0.81737606 6 r x

...ebra but currently I need to understand what the function qr.qty is actually doing. The documentation states that it calculates t(Q) %*% y via a previously performed QR matrix decomposition. In order to do that, I tried following basic example: m<-matrix(c(1,0,0,0,1,0,0,0,1,0,0,1),ncol=3) # 4x3 matrix qr.qty(qr(m),matrix(c(1,2,3,4,2,3,4,5,1,1,1,1,2,2,2,2),nrow=4)) [,1] [,2] [,3] [,4] [1,] -1 -2 -1 -2 [2,] -4 -5 -1 -2 [3,] 3 4 1 2 [4,] -2 -3 -1 -2 As far as I understood the documentation a call such as t(qr.Q(qr(m)))%*%matrix(c(1,2,3,4,2,3,4,5,1...

...Ref.html , and understand the expressivity of aggregate types. What I do not yet have a good feeling for is when to use them. To give a concrete example, I'd like to parse a greyscale image in to an LLVM data structure. At each {x,y} point, there is an Int8 value between 0 and 255. Take a small 4x3 image. I could feed my pixels in to a flat Int8 vector of length 12. I could also feed it in to an array of length 4, of Int8 arrays of length 3. Now take 2 simple functions: one does greyscale brightening, the other does a sobel filter. The first needs only to know the value of 1 pixel at a time,...

Is there a way to apply a function with several arguements over an array? For instance if you had a function d<-function(a,b,c) {a+b+c} and a 4,3 array, could you apply the function over each line of the array? tapply seems to only allow one argument, and I just can't think of a way to explicitly tell R that I am passing it 3 distinct objects instead of 1 complex one. Thank you as

...2,3), sum) db3 <- t(apply(db2, 1, function(poff) 100-(100*abs(poff/sum(poff)-(1/3))) ) ) My request now is about the function at the end of the calculation in db3. IF instead of the difference from a number, here 1/3, I need to calculate the following difference: consider that db3 is a matrix 4x3, I need to calculate (db3[1,1] -db3[1,2])+(db3[1,1] -db3[1,3])*0.5 and store it to a cell, then (db3[1,2] -db3[1,1])+(db3[1,2] -db3[1,3])*0.5 and store it to a cell, then (db3[1,3] -db3[1,2])+(db3[1,3] -db3[1,2])*0.5 and store it to a cell, then repeat this for each of the four row...

...into using the reprex package to check your example next time. I don't do this kind of analysis... I really don't know what to expect from the functions. The final step in your sequence produces a vector of sixteen values, not 1 value, nor 4 values, so I don't know how to obtain the 4x3 result you said you expected... I got 16x3. myframe <- data.frame( ID = c( "Ernie", "Ernie","Ernie","Ernie","Ernie","Ernie") , Timestamp = c( "24.09.2012 08:00", "24.09.2012 09:00"...

...as my firewall, and a separate home server on a HP Microserver [2]. IMHO, keeping the firewall function completely separate simplifies security. that router board can handle 300 Mbit/sec of NAT firewall rules, since I only have 30Mbit internet, thats plenty of headroom. the Microserver has 4x3 TB SATA drives in a raidZ (ZFS) for 7.5 TiB usable. I can muck about with the server at my leisure, and reboot it, and not affect internet routing to my wife. the firewall doesn't need mucking about with and has uptimes measured in months (time between pfSense upgrades). pfSense provid...

Dear all, I have a data similar to this: myframe<- data.frame (ID=c("Ernie", "Ernie","Ernie","Ernie"), Timestamp=c("24.09.2012 08:00", "24.09.2012 09:00", "24.09.2012 10:00", "25.09.2012 10:00"), Longitude=c("8.481","8.482","8.483","8.481"),

On Sat, Nov 2, 2013 at 2:48 PM, Rob Stewart <robstewart57 at gmail.com> wrote: > Hi, I'm getting started with LLVM, with the intention of writing a DSL > that compiles to LLVM IR, to target a new CPU instruction set. I have > two questions: > > 1. Multimedia IO in LLVM > > In the paper "The LLVM Instruction Set and Compilation Strategy" [1], > there is

My OQO has a VIA chipset. From the hwconf: class: VIDEO bus: PCI detached: 0 desc: "VIA Technologies, Inc. CX700M2 UniChrome PRO II Graphics" vendorId: 1106 deviceId: 3157 subVendorId: 1106 subDeviceId: 3157 pciType: 1 pcidom: 0 pcibus: 1 pcidev: 0 pcifn: 0 When I install Centos, I default to the vesa driver, and it operates at the monitor's native 800x480. Of course I

Greetings, I'm rebuilding a machine to function as a gateway/router to Verizon DSL. It has two NICs eth0 and eth1 (static set to 192.168.1.1). eth0 connects to the DSL modem. I've setup Verizon DSL usine pppoe-setup, and it works. I can connect from home machines to the server (192.168.1.1); while logged in to the server, I can connect to both the internet, and the home machines.

Hi, I'm getting started with LLVM, with the intention of writing a DSL that compiles to LLVM IR, to target a new CPU instruction set. I have two questions: 1. Multimedia IO in LLVM In the paper "The LLVM Instruction Set and Compilation Strategy" [1], there is talk about a possible multimedia instruction set in a future LLVM release: "Note that LLVM is a virtual instruction

Hi, I guess this is a good time to start putting together a wish list for a video codec. I see that for audio the compression is around 10X for reasonable quality. I am sure this will start its own thread of conversation. For video you can do 40X fairly easily and the big task is to go to 80X or 100X with reasonable picture quality, say, a peak luma SNR of more than 30 dB. Uncompressed

On Fri, Feb 1, 2019 at 1:19 AM Bruce Hoult <brucehoult at sifive.com> wrote: > On Thu, Jan 31, 2019 at 11:53 PM Luke Kenneth Casson Leighton via > llvm-dev <llvm-dev at lists.llvm.org> wrote: > > > > --- > > crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68 > > > > On Thu, Jan 31, 2019 at 10:22 PM Jacob Lifshay

On Tue, Oct 1, 2019 at 11:08 AM Graham Hunter <Graham.Hunter at arm.com> wrote: > Hi Luke, hi graham, thanks for responding in such an informative fashion. > > On 1 Oct 2019, at 09:21, Luke Kenneth Casson Leighton via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > typedef vec4 float[4]; // SEW=32,LMUL=4 probably > > static vec4 globalvec[1024]; // vscale ==

Hello list. I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without modifications. How did I try it? Created a (non-root) build environment (not a mock ) Installed the kernel.scr.rpm and did a rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee prep-out.log The build failed at the end: Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL Checking