Articles

5 must have R programming tools

-
Image
Follow us We have the truth R, along with Python, is one of the most popular tools for conducting data science. Propelled by a historically strong open-source developer community (R is about 25 years old — older than some data scientists), R is now strongly sought after by employers eyeing data scientists. Although R by itself is extremely powerful, there exist a few other (crucial) tools any R users should become familiar with. Now, in no particular order, we have: 1- RStudio Most R users have probably heard of RStudio. It’s by far one of the most popular R tools in existence and you probably already have it. However, that doesn’t preclude it from inclusion here, because RStudio truly is a must-have. Conveniently, the user interface gives you four quadrants that are a necessity to working efficiently with R: (upper left) your current file, (upper right) your current workspace, which contains variables and other objects, (lower left) an R console and (lower right) a window f
Enregistrer un commentaire
Lire la suite

Bitcoin plummets under $6,000 to a new low for the year after months of stability

-
Image
Bitcoin fell more than 7 percent Wednesday after a relatively calm few months. The cryptocurrency dropped to $5,640.36, hitting a new low for the year. Ethereum and XRP, the second and third largest cryptocurrencies behind bitcoin, dropped 13 percent and 15 percent respectively. Bitcoin hits 2018 low Bitcoin hits 2018 low  1 Hour Ago | 01:15 Bitcoin's moment of relative stability ended abruptly Wednesday. The world's largest cryptocurrency hit its lowest level of the year, falling as much as 9 percent to a low of $5,640.36, according to CoinDesk. Bitcoin had been trading comfortably around the $6,400 range for the majority of the fall, a stark contrast from its volatile trading year. Other cryptocurrencies fared even worse on Wednesday. Ether fell as much as 13 percent while XRP, the third largest cryptocurrency by market capitalization, dropped 15 percent, according to CoinMarketCap.com. The rout is likely being spurred by uncertainty around bitcoin cash, ac
Enregistrer un commentaire
Lire la suite

Melissa McCarthy Lives the Mom Dream in Her New Life of the Party Trailer

-
Image
Follow us We have the truth    According to the trailer released by Warner Bros. Pictures today, the one unusual thing in Melissa McCarthy’s upcoming comedy Life of the Party should be that she’s a newly-single mom enrolled in the same college as her daughter, territory famously explored in 1986 Rodney Dangerfield classic Back to School. However, based solely on the limited footage available, the most remarkable thing about the trailer is how exceedingly chill McCarthy’s kid is about the whole thing. Your mom or dad’s college fantasy (going to all the frat parties, hooking up with extremely young hotties in the library, performing in some kind of fabulous talent show) would be most college-age children’s waking nightmare. But nightmares are much less fun, so bring on Melissa McCarthy dominating a dance circle!
Enregistrer un commentaire
Lire la suite

Technology of Business

-
Image
Follow us We have the truth Imaginez que vous soyez capable de fabriquer une machine, faites vos enchères avec vos pensées seules, sans appuyer sur un bouton, en tapant, en tapotant à l'écran ou en tâtonnant avec des télécommandes, juste de la puissance cérébrale. Eh bien, ce scénario de science-fiction pourrait être plus proche de la réalité que vous ne le pensez. La vie de Bill Kochevar a été changée, apparemment irrévocablement, quand il a été paralysé des épaules vers le bas suite à un accident de vélo il ya près de dix ans. Son avenir semblait sombre. Mais l'année dernière, il a été équipé d'une interface cerveau-ordinateur, ou BCI, qui lui a permis de bouger son bras et sa main pour la première fois en huit ans. Des capteurs ont été implantés dans son cerveau, puis pendant une période de quatre mois, M. Kochevar a entraîné le système en pensant à des mouvements spécifiques, comme tourner son poignet ou saisir quelque chose. Les capteurs ont effectivement
Enregistrer un commentaire
Lire la suite

Analyzing the Linux boot process

-
Image
Follow us We have the truth The oldest joke in open source software is the statement that "the code is self-documenting." Experience shows that reading the source is akin to listening to the weather forecast: sensible people still go outside and check the sky. What follows are some tips on how to inspect and observe Linux systems at boot by leveraging knowledge of familiar debugging tools. Analyzing the boot processes of systems that are functioning well prepares users and developers to deal with the inevitable failures. More Linux resources What is Linux? What are Linux containers? Download Now: Linux commands cheat sheet Advanced Linux commands cheat sheet Our latest Linux articles In some ways, the boot process is surprisingly simple. The kernel starts up single-threaded and synchronous on a single core and seems almost comprehensible to the pitiful human mind. But how does the kernel itself get started? What functions do initrd ( initia
Enregistrer un commentaire
Lire la suite

How debuggers really work

-
Image
Follow us We have the truth Image by : opensource.com A debugger is one of those pieces of software that most, if not every, developer uses at least once during their software engineering career, but how many of you know how they actually work? During my talk at linux.conf.au 2018 in Sydney, I will be talking about writing a debugger from scratch... in Rust ! In this article, the terms debugger/tracer are interchangeably. "Tracee" refers to the process being traced by the tracer. The ptrace system call Most debuggers heavily rely on a system call known as ptrace(2), which has the prototype:long ptrace(enum __ptrace_request request, pid_t pid, void *addr, void *data); This is a system call that can manipulate almost all aspects of a process; however, before the debugger can attach to a process, the "tracee" has to call ptrace with the request PTRACE_TRACEME. This tells Linux that it is legitimate for the parent to attach via ptrace to thi
Enregistrer un commentaire
Lire la suite
-
Image
Follow us We have the truth Image by : opensource.com Google developer advocate Kelsey Hightower says that he always figured that the (now wildly successful) Kubernetes container orchestration platform "would get big on its own at some point." He shared some of the reasons he sees for Kubernetes' success in a podcast recorded in December at CloudNativeCon in Austin. The first is that Kubernetes is an effective platform on which to do other things. It provides "better primitives than I had before" as Hightower puts it. At the same time, he says that this is something people misunderstand about Kubernetes. "It's not the end game," he says. Rather, at some point, it increasingly becomes "the new platform for building other platforms." It's really a story about abstraction, which is arguably at the core of much of the history of the computer industry. The Open Container Initiative (OCI) provides container runtime and
Enregistrer un commentaire
Lire la suite