Given a rectangular grid with unit spacing, what is the expected distance between two random vertices, where distance is measured in the L1 metric? (Here "random" means "uniformly at random.") I recently needed this answer for some small grids, such as the one to the right, which is a 7 x 6
El pasado 17 de junio Colombia eligió a Iván Duque, el candidato del Centro Democrático, como su próximo presidente. El ganador junto con su gabinete, que ejercerán desde el próximo 7 de agosto y hasta el 2022, recibirán un país que aunque se recupera económicamente, aún enfrenta grandes retos en
Ich blinzele, kann kaum was sehen. Die Sonne scheint mir direkt ins Gesicht. Hell, schmerzhaft, stechend – aber ich weiß, dass alle meine Sinne geschärft sein müssen. Ich bemühe mich zu sehen, was vor mir liegt. Denn ich fahre 60 km/h und fühle mich dabei fast blind. Und um mich
I usually create very technical graphs, that just focus on conveying the information in a concise and straightforward manner (no wasted colors, and nothing to distract you from the data). But sometimes, depending on your audience and the purpose of the graph, you might need to create a graph that
PC Magazine defines the broad industry term Software as a Service (SaaS) as, “Software that is rented rather than purchased. Instead of buying applications and paying for periodic upgrades, SaaS is subscription based, and upgrades are automatic during the subscription period.” SaaS, according to the same source, is ideally suited
Before grabbing that streaming data so quickly, Joyce Norris-Montanari says you should ask a few questions.
Find out about the new edition of Ron Cody's latest best selling book.
Continued fractions show up in surprising places. They are used in the numerical approximations of certain functions, including the evaluation of the normal cumulative distribution function (normal CDF) for large values of x (El-bolkiny, 1995, p. 75-77) and in approximating the Lambert W function, which has applications in the modeling
Many of the most beautiful areas in the US are owned by the government, to preserve them and allow access for everyone to enjoy them. And most US schools are traditionally closed during the summer, which provides families a great opportunity to go visit state and federal lands (parks, forests,
Are you curious? Do you have a passion for science, technology, engineering and math (STEM)? Do you enjoy robotics or statistics? Do you like to solve hard problems? If you answered yes to any of the above, you might have what it takes to be a data scientist. Recently, I
암 치료는 매우 힘든 과정입니다. 따라서 환자별 최적의 치료법을 선택하고, 환자가 효과 없는 치료법으로 인해 필요 이상의 고통을 받지 않도록 하는 것이 중요한데요. 검사를 통해 치료의 진척 상황을 측정할 수는 있지만, 많은 환자들이 치료 과정을 변경하기에는 너무 늦은 시기까지 처방의 효과를 알지 못합니다. 그렇다면 만약 특정 암 치료의 효과를 수일
Let’s face it: teaching students to write well is a remarkably complex task. Whether they’re explicating an Emily Dickinson poem or reporting lab results for a science class, student writers must express themselves clearly and forcefully—and that usually involves revision. As James Baldwin knew, rewriting is both painful and
Hybrid computers that marry CPUs and devices like GPUs and FPGAs are the fastest computers, but they are hard to program. This post explains how deep learning (DL) greatly simplifies programming hybrid computers.
Hace algún tiempo, asistí a una presentación en la que un ejecutivo de un fabricante de teléfonos argumentaba que el teléfono perfecto debería incluir un botón para cada funcionalidad importante: para ajustar el volumen, para tomar fotos, para hacer llamadas. En ese mismo evento, un representante de Apple aseguraba que
In the SAS/IML language, you can only concatenate vectors that have conforming dimensions. For example, to horizontally concatenate two vectors X and Y, the symbols X and Y must have the same number of rows. If not, the statement Z = X || Y will produce an error: ERROR: Matrices
机上で男女が世界地図を広げて、何かの打ち合わせをしています。 航空会社A社の企画担当が、競合他社の路線を分析しているのか？ それとも、これから二人で行く海外旅行のプランを立てているのか？ いえいえ、これはSAS Visual Analyticsで作成されたダッシュボードの画面です。 このダッシュボードの構成は以下の通りです。 ・使用しているデータ：OpenFlightsで公開されている世界の空港の利用状況のデータ ・真ん中の世界地図：「ネットワークダイアグラム」オブジェクトを使用し、背景に地図を表示して、路線を描画 バブルの大きさは、利用頻度を表しています。 ・左側の棒グラフ：利用頻度の高いトップ１０の航空会社 ・右下と左下の数値：「キーの値」オブジェクトを使用し、注目すべき指標をクローズアップしています。例えば右下の値は、利用頻度が最も高い空港名とその数を示しています。 ・人の手や机、カメラ、パソコン等は背景に使用している画像です。 今、このダッシュボードでは、左側の棒グラフ上で「Air China」が選択され、ネットワークダイアグラムと２つの指標はAir Chinaに自動的に絞り込まれた内容が表示されています。 でも、まだ、これは張りぼて？ と思っていませんか。 以下は、左側の棒グラフ上で「US Airways」を選択した状態です。 ネットワークダイアグラムや２つの指標の内容が変わっているのがわかりますね。 ご覧の通り、インタラクティブなダッシュボードです。 みなさんも、こんなクールなダッシュボードで戦略を練ってみれば、新たなアイデアが湧いてくるかもしれませんね。 このブログは、SAS CommunityサイトのVisual Analytics ギャラリーに公開されている内容に基づいています。
If you're good at games like Wheel of Fortune, Scrabble, or Words with Friends, you've probably figured out that certain letters appear more often than others. But do you have a cool way to figure out which letters appear most & least frequently? How about using a computer to plot
인공지능(AI), 사물인터넷(IoT) 등 다양한 디지털 기술이 융합되면서 기업의 마케팅 전략도 혁신을 거듭하고 있습니다. 특히 고객이 특정 순간과 장소에서 기대하는 바를 충족시키는 ‘개인화된 경험’이 핵심 마케팅 역량으로 떠올랐는데요. 이를 위해서는 고객 데이터를 실시간으로 분석해 개별 고객의 특성과 원하는 바를 보다 잘 이해하고, 언제 어디서나 고객의 소비 여정과 함께하는 실시간 마케팅(Real-time marketing) 전략을 구현해야
Note: The following concludes an eight-part serialization of selected content from Steve Morlidge's The Little (Illustrated) Book of Operational Forecasting. Good forecasts don’t always ‘look right’ Many forecasters believe that they can tell how good a forecast is by ‘eyeballing’ it. Good forecasts just ‘look right’ or so they would
A SAS programmer recently asked me how to compute a kernel regression in SAS. He had read my blog posts "What is loess regression" and "Loess regression in SAS/IML" and was trying to implement a kernel regression in SAS/IML as part of a larger analysis. This article explains how to
Note: Following is an eight-part serialization of selected content from Steve Morlidge's The Little (Illustrated) Book of Operational Forecasting. The measurement challenge So here is the forecasters dilemma: There will always have forecast error. The challenge is to work out the cause of the error and to take the appropriate
Using relative file paths in your SAS programs? Use the new DLGCDIR function to manage your SAS working directory -- even in SAS Enterprise Guide or SAS Studio -- to ensure your programs are working the way they ought to.
We'll take a short break from the Steve Morlidge book serialization, to announce that SAS Research & Development has again provided $10,000 in funding for the SAS/IIF grant program. Both academics and industry practitioners are encouraged to apply and conduct original research for improving the practice of forecasting. SAS/IIF Grants
This blog post highlights more SAS Global Forum papers chosen by SAS Press authors.
IFRS 17은 보험 업계에 대대적인 변화의 바람을 일으키고 있습니다. 이 새로운 국제회계기준이 발효되는 2021년 1월은 아직 먼 미래처럼 느껴질 수 있지만, 유럽 일반개인정보보호법(GDPR) 경험을 통해 배웠듯이 모든 과정은 놀랍도록 빠르게 진행될 것입니다. 무엇보다 IT 솔루션은 급하게 구현할 수 있는 것이 아닙니다. 충분한 시간을 갖고 현명한 결정을 내리기 위해서는 지금 바로 행동에
Note: Following is an eight-part serialization of selected content from Steve Morlidge's The Little (Illustrated) Book of Operational Forecasting. The forecasting challenge It is not possible to forecast any future outcomes precisely. Only the signal is potentially forecastable – noise is unforecastable in principle. And all forecasts assume that the
My buddy Chris recently blogged about accessing the IoT data from an M&M jar being monitored in one of the breakrooms at SAS. Now I'm going to take things a step further and analyze that data with some graphs. Grab a snack, and follow along, as we dig into this
As a third-year intern here at SAS and rising sophomore in college, I’ve been fortunate enough to have completed a few projects in various corners of the tech space. Having gathered my third data point this summer, and in the spirit of SAS #analytics, I’ve started making some data-driven inferences
A frequent topic on SAS discussion forums is how to check the assumptions of an ordinary least squares linear regression model. Some posts indicate misconceptions about the assumptions of linear regression. In particular, I see incorrect statements such as the following: Help! A histogram of my variables shows that they
Note: Following is an eight-part serialization of selected content from Steve Morlidge's The Little (Illustrated) Book of Operational Forecasting. Data Series are different – and it matters to forecasters The nature of demand that is to be forecast, as represented by patterns in the historic data series, that is to
