xianyi

#include <cblas.h>
#include <stdio.h>

void main()
{
  int i=0;
  double A[6] = {1.0,2.0,1.0,-3.0,4.0,-1.0};         
  double B[6] = {1.0,2.0,1.0,-3.0,4.0,-1.0};  
  double C[9] = {.5,.5,.5,.5,.5,.5,.5,.5,.5}; 
  cblas_dgemm(CblasColMajor, CblasNoTrans, CblasTrans,3,3,2,1,A, 3, B, 3,2,C,3);

gizmaa

Plotting

Last Update: May 13, 2019
Offline Version

Contents

• Translating
• Important Note
Basic Plot

xianyi

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
extern void dgeqrt3_(long * m, long *n, double * a, long *lda, double *t, long *ldt, long*info);

int main(int argc, char**argv)
{
  int in, i;
  long n,info=1;

ggggggggg

The archive paper provides 10 example hard complex divions with answers.  It also provides an algorith for measuring the accuracy of the result in "bits", which I have implemented.  The robust cdiv algorithm is said to get 53 bits for all but #8 on the hard problems, where it gets 52 bits. I reproduce all of the results (also the default julia / reproduces results for smith's algorithm), except I get 0 bits on #5.  I've tracked this down to the division of b/c returning zero inside robust_cdiv2, after r is also zero. But it's not clear how to fix it.


cdiv #1 ,53 bits accurate, 1.1125369292536007e-308 - 1.1125369292536007e-308im
cdiv #2 ,53 bits accurate, 8.98846567431158e307 + 0.0im
cdiv #3 ,53 bits accurate, 1.4334366349937947e104 - 3.645561009778199e-304im
cdiv #4 ,53 bits accurate, 8.98846567431158e307 + 0.0im
cdiv #5 ,0 bits accurate, 3.757668132438133e109 - 2.0e-323im
cdiv #6 ,53 bits accurate, 2.0e-323 + 1.048576e6im
cdiv #7 ,53 bits accurate, 3.8981256045591133e289 + 8.174961907852354e295im

chrismccoy

# alias to edit commit messages without using rebase interactive
# example: git reword commithash message
reword = "!f() {\n  GIT_SEQUENCE_EDITOR=\"sed -i 1s/^pick/reword/\" GIT_EDITOR=\"printf \\\"%s\\n\\\" \\\"$2\\\" >\" git rebase -i \"$1^\";\n git push -f;\n}; f"

# aliases to change a git repo from private to public, and public to private using gh-cli
alias gitpublic="gh repo edit --accept-visibility-change-consequences --visibility public"
alias gitprivate="gh repo edit --accept-visibility-change-consequences --visibility private"

# delete all your repos using gh-cli (please do not run this unless you want to delete all your repos)
gh repo list --limit 300 --json url -q '.[].url' | xargs -n1 gh repo delete --yes

soofaloofa-zz

A comparison of Collection+JSON, HAL, JSON-LD and SIREN media types.

Discussion at 

http://sookocheff.com/posts/2014-03-11-on-choosing-a-hypermedia-format/

trevnorris

The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.

When you want to generate the flame graph, run the following (folder locations taken from install script):

sudo sysctl kernel.kptr_restrict=0
# May also have to do the following:
# (additional reading http://unix.stackexchange.com/questions/14227/do-i-need-root-admin-permissions-to-run-userspace-perf-tool-perf-events-ar )
sudo sysctl kernel.perf_event_paranoid=0

d3.js in IPython 2.0.ipynb

joyrexus

A quick overview of the node.js streams interface with basic examples.

This is based on @brycebaril's presentation, Node.js Streams2 Demystified

Overview

Streams are a first-class construct in Node.js for handling data.

Think of them as as lazy evaluation applied to data.

davidvthecoder

package main

import (
	"log"
	"math"
)

func Round(val float64, roundOn float64, places int ) (newVal float64) {
	var round float64
	pow := math.Pow(10, float64(places))