[social4i size="small" align="align-left"][This article was first published onJason Bryer, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Cluster analysis is a statistical procedure for grouping observations using an observation-centered approach as compared to variable-centric approaches (e.g. PCA, factor analysis). Whether a preprocessing step for predictive modeling or the primary analysis, validation is critical for determining generalizability across d ...继续阅读 (56)

[social4i size="small" align="align-left"][This article was first published ondatascienceconfidential - r, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.I’m going to discuss some horrifying ideas in this post, so let’s begin with some good news!I’vepreviously studiedtech layoffs. According to my main source of datalayoffs.fyi, the weekly number of layoffs has been steadily declining. In the US, this has been compensated by a huge number of layoffs in the g ...继续阅读 (54)

看似不带任何“市场偏见”的风险平价模型本身已构成一个明确的观点：四种不同经济情景在未来发生的概率相等，谁能轻易能下这一定论或做这一假设？前言市面上有很多讲关于全天候策略和风险平价模型如何运作的研报，它们大多是在基于不同资产的历史波动率和协方差矩阵的近似实现，本文批判均值-方差的优化方法。回测结果能说明什么？选取国内A股市场能买到的投资标的，其中大部分标的都使用挂钩指数表示，剔除了分红、管理费、基金折溢价等无关因素，回测结果更保守（黄金ETF可以替代成黄金T+D价格）。数据周期：2020年9月30日-2025年7月31日风险指标：投资品种过去半年的历史波动率和不同资产之间的协方差矩阵三个策略：象限间风险平价、象限间最大化夏普比例、象限内最大夏普+象限间风险平价回测设定：交易费用万分之二，夏普比例的无风险利率是年化1.5%，没有考虑期间内任何分红收益，持仓不超过100%总资产各类资产的收益率情况不同资产之间协方差矩阵根据这个协方差我们可以把资产分割成几组相对独立的资产：黄金、国债、商品、红利、国内宽基、海外宽基。我根据国内资本市场的情况，毕竟基于构建中国版全天候策略的想法，所以在象限设置时候海外宽基更多基于避险和分散的目的，把资产类别添加到四个象限：超预期通胀+超预期增长（过热）：国内宽基、商品超预期通胀+增长不及预期（滞胀）：黄金、商品、海外宽基、红利通胀不及预期+超预期增长：国内宽 ...继续阅读 (59)

[social4i size="small" align="align-left"][This article was first published onpharmaverse blog, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.------------- typical setup ---------------------------- post begins here ---------------A Centralized Metadata Object Focus on Clinical Trial Data Programming Workflows • metacore{metacore}and GitHub – pharmaverse/metatools{metatools}have a new package maintainerHi, everyone! I’mLiamand I’m excited to announc ...继续阅读 (41)

[social4i size="small" align="align-left"][This article was first published onDataGeeek, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Morgan Stanley analysts believe that the One Big Beautiful Bill will be a boon for Big Tech, as it will provide a cash influx to AI giants, thereby enhancing their dominance in future AI competitions.But Trump’s 1 August tariffs, which compensate for tax cuts in the aforementioned bill, seemed not to benefit the tech firms, ...继续阅读 (50)

[social4i size="small" align="align-left"][This article was first published onChris Bowdon, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Time to finally patch a hole in the leaky roof of my knowledge: what are Generalised Linear Models anyway?Groundwork: what are Linear Models anyway?Generalised Linear Models (GLMs) are a short step from Linear Models,provided you have the right understanding of linear models. There’s also some stats jargon to get a handl ...继续阅读 (55)

[social4i size="small" align="align-left"][This article was first published onAlbert Rapp, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Shiny in a NutshellVideoCheckout the full R-Shiny playlist herePLAYLISTCodePress to unfold codelibrary(shiny) ui <- bslib::page_fluid( sliderInput( 'my_slider', # Input ID 'Select your number', # Input label # Input-specifc stuff min = 0, max = 1, value = 0.5, step = 0.1 ), selectInput( ...继续阅读 (60)

[social4i size="small" align="align-left"][This article was first published onjakub::sobolewski, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Your code often relies on external systems—LLMs, APIs, databases, or third-party libraries. While these are essential for functionality, they don’t need to be part of your tests.Here’s a practical pattern to test your code without relying on external dependencies, so your tests remain fast, reliable, and cheap.Check ...继续阅读 (57)

[social4i size="small" align="align-left"][This article was first published onStencilled, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Introducing AMI – Adaptive Media Intelligence, a platform that democratizes data access through conversational analytics, interactive dashboards, and AI-powered insights.Toleave a commentfor the author, please follow the link and comment on their blog:Stencilled.R-bloggers.comoffersdaily e-mail updatesaboutRnews and ...继续阅读 (53)

[social4i size="small" align="align-left"][This article was first published onThe Jumping Rivers Blog, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.In this blog post, we are going to use data from the{gapminder}R package, along with global spatial boundaries from‘opendatasoft’. We are going to plot the life expectancy of each country in the Americas and animate it to see the changes from 1957 to 2007.The {gapminder} package we are using is from theGapmind ...继续阅读 (62)

In a bustling city like Sydney, maintaining a clean and hygienic environment is crucial for business success. While every industry can benefit from professional cleaning, certain sectors see more significant advantages from dedicated services. Whether you operate in Menai, Merrylands, or anywhere else across the region, understanding how tailored cleaning can impact your industry is […]The postIndustries That Benefit Most from Commercial Cleaning in Sydneyappeared first onJ L I Blog. ...继续阅读 (33)

[social4i size="small" align="align-left"][This article was first published onForwards, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Forwards members Heather Turner and Ella Kaye were invited to attend the “Data Science for Girls” open event hosted byR-GirlsatGreen Oak Academy, Birmingham, UK on July 9 2025. They joined other guests fromAscentandHealth Data Research UKto find out how students at this girls’ school have been using R.From left to right: Yan ...继续阅读 (56)

“诗馀”也就是词。此《诗馀画谱》（又名《草堂诗馀意》）由明末宛陵汪氏辑。全不分卷，其内容撷取南宋《草堂诗馀》书中精粹的唐宋词百篇，请名家书翰，徽派名家摹刻历代名家作品为之配图，一词一图，相映成趣。此为绍兴图书馆藏明万历四十年宛陵汪氏刊本（残七十二幅）。 ...继续阅读 (61)

[social4i size="small" align="align-left"][This article was first published onjakub::sobolewski, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.When writing specifications, it’s easy to get caught up in implementation details, especially when adding specifications after the software was built.Let’s see how we can add specifications for existing code and get Cucumber specifications that reflect business concepts rather than UI specifics that makes extension ...继续阅读 (56)

[social4i size="small" align="align-left"][This article was first published onR Works, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.1. Introduction1.1. The use of AI agents and the case for “prompt” choicesWeintroducedthe use of the AI pair programmer, Copilot, while working withtidyverse. In this post, we walk the reader through the fundamental driver of successfully using AI agents – prompting. Prompting is the method of instructing an LLM to perform a ...继续阅读 (63)

[social4i size="small" align="align-left"][This article was first published onR Works, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.In June, one hundred twenty-three new packages made it to CRAN. Here are my Top 40 picks in twenty-one categories: AI, Chess, Computational Methods, Data, Decision Analysis, Ecology, Epidemiology, Finance, Genomics, Linguistics, Machine Learning, Mathematics, Medical Statistics, Music Theory, Networks, Programming, Statistics ...继续阅读 (53)

[social4i size="small" align="align-left"][This article was first published onR on Biofunctor, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.In this week’s episode of the “Hidden Monads in R” series, I’ll explore the vector aspect of R data structures, and see how the flatmap operation can be quite useful.Flatmap? Aren’t all maps flat?The Nobel Prize organisation providesan APIwith information about the prizes and laureates. We can retrieve a JSON file, wh ...继续阅读 (56)

嵩山为五岳之“中岳”。此《中岳图》册由清人绘制。全册共十二开，依次描绘无名寺、中岳庙、少林寺、龙泉寺、会善寺、法王寺、嵩岳寺、莲花峰、少阳河、轘辕关、嵩山南面、北面等景点。画山中胜景古迹，同时写明方位或景点。此册现藏于台北故宫博物院。 ...继续阅读 (54)

[social4i size="small" align="align-left"][This article was first published onjakub::sobolewski, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.From my experience, LLMs are much better at writing JavaScript code than they are at writing R code at the moment.I wanted to check how well Copilot does with refactoring existing Playwright and Cucumber test code.Refactoring existing test codeBefore refactoring, I had a single step definition file that contained al ...继续阅读 (62)

[social4i size="small" align="align-left"][This article was first published onR-posts.com, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Join our workshop onEfficient R – How to write faster code, which is a part of our workshops for Ukraine series!Here’s some more info:Title:Efficient R – How to write faster codeDate:Thursday, August 28th, 18:00 – 20:00 CEST (Rome, Berlin, Paris timezone)Speaker:Selina Baldauf, Selina is a theoretical ecologist and a scie ...继续阅读 (53)

此《少林寺志》由清代叶封、焦钦宠等采辑，施奕簪、焦如蘅等续编。这是历史上第一部关于少林寺的专志。全书不分卷，内容包含：绘图、形胜、营建、古迹、祥异、艺林、题咏等内容。此为清乾隆十三年刊本。 ...继续阅读 (60)

[social4i size="small" align="align-left"][This article was first published onR4Good.Academy R-Bloggers, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.What is the goal of the post? Reframe the goal to relate it to your reader. What value do you offer then? What the message I want them to take away? So what? Because... repeat. You will learn how to quickly get to optimal decisions about discretionary spending and portfolio allocation for a single-perso ...继续阅读 (53)

此《百兽图》卷由清代华嵒绘。画卷描绘沃野滩涂、溪涧幽谷、沟壑密林间绘犬、牛、羊、马、狼、虎、鹿、猴、熊等九种近百只畜兽及其生长环境，其间生长着竹、柏、松、柳、梧桐、芦苇等各色植物。百兽率舞寓意政治清明，天下太平。此卷现藏于北京故宫博物院。 ...继续阅读 (58)

[social4i size="small" align="align-left"][This article was first published onAdam's Software Lab, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.IntroductionIn thefirst partof this series, I looked at using R in Excel to obtain descriptive statistics. In this second part of the series I am going to look at using R in Excel to perform linear regression, specifically using thelm()function.lm()is a real workhorse function. It can be used to carry out bot ...继续阅读 (52)

[social4i size="small" align="align-left"][This article was first published onAdam's Software Lab, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.IntroductionThe purpose of this series of posts is to demonstrate some use-cases forR in Excelusing theExcelRAddIncomponent (disclaimer: I am the developer of this add-in:ExcelRAddIn). The fundamental rationale for the add-in is that it allows access to the extensive R ecosystem within an Excel worksheet. Exc ...继续阅读 (61)

[social4i size="small" align="align-left"][This article was first published onAdam's Software Lab, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.IntroductionIn the last post in this series I am going to look at calling Python from R. Even though Excel now provides a means of calling Python scripts directly, using the=PY()formula in a worksheet, there are still occasions when it is beneficial to call Python via R. For example, it turns out that importi ...继续阅读 (58)

[social4i size="small" align="align-left"][This article was first published onAdam's Software Lab, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.IntroductionWe have already seen how to obtain descriptive statistics inPart Iand how to uselm()inPart II. In this part (Part III) of the series we will look at using R in Excel to perform forecasting and time series analysis.In the previous two parts we have seen different ways to handle the output from R fu ...继续阅读 (53)

[social4i size="small" align="align-left"][This article was first published onThe Jumping Rivers Blog, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Do you use R? Would you like to play a part in sustaining it? Find out about the R Dev Day that is returning as a satellite event toShiny in Production 2025. This post will answer questions you may have, such as: “Do I need to be an R guru to participate?”, “What will I be expected to do?”, and “Is there a cos ...继续阅读 (55)

此《小学五书》由宋代张时举编纂。全书集录管子《弟子职》、班昭《女诫》、吕大钧兄弟《乡约》《乡仪》以及司马光《居家杂仪》五种有关家训、处世的著作，供蒙童学习。此为清初毛氏汲古阁影宋抄本，现藏中国国家图书馆。 ...继续阅读 (55)

[social4i size="small" align="align-left"][This article was first published onrOpenSci - open tools for open science, and kindly contributed toR-bloggers]. (You can report issue about the content on this pagehere)Want to share your content on R-bloggers?click hereif you have a blog, orhereif you don't.Before sending DELETE THE INDEX_CACHE and re-knit!Dear rOpenSci friends, it’s time for our monthly news roundup!blablaYou can read this poston our blog. Now let’s dive into the activity at and around rOpenSci!rOpenSci HQOpen Science with a Latin American Identity: Meet the New Cohort of the rOpe ...继续阅读 (55)