search for: teetor

I've tried various commands. ?plot, Teetor's book, "R Cookbook", and Mittal's book, "R Graphs Cookbook" without seeing how to write the command to create scatterplots from my data.frame. The structure is: > str(chemdata) 'data.frame': 14886 obs. of 4 variables: $ site : Factor w/ 148 levels &quo...

...d using dedicated distros, such as Raspian, when Ubuntu went all-in on RPi support, which happened in their newest release focal (20). The dedicated distros often have an unhelpful attitude -- e.g., "you should use *this* package, not *that* package" -- that doesn't work for me. Paul Teetor, Elgin, IL USA http://quantdevel.com/public On Wednesday, July 15, 2020, 09:26:27 AM CDT, Dirk Eddelbuettel <edd at debian.org> wrote: On 15 July 2020 at 14:03, Paul Teetor wrote: | Dear R-SIG-Debian folks, | | I seem to be chasing my tail, despite having a simple goal: | | - I...

...than the AWS box that currently hosts my web site, RStudio server, and Shiny server! For the truly curious, you can view my RPi cluster here:?https://photos.app.goo.gl/kALwoYCVxJ32VgxEA Thanks again, Dirk. Your contributions to Debian and Ubuntu are foundational for my computing platforms. Paul Teetor, Elgin, IL USA http://quantdevel.com/public On Wednesday, July 15, 2020, 11:52:03 AM CDT, Dirk Eddelbuettel <edd at debian.org> wrote: On 15 July 2020 at 16:35, Paul Teetor wrote: | Thank you very much, Dirk. That nudge solved the problem, of course. I am embarrassed. I was so fi...

...In grep(), it doesn't matter which of a or b matches. It's only in sub() or gsub() that it makes a difference. Do you know an authoritative reference that discusses those functions? ChatGPT: [long irrelevant answer about sub and gsub, with a reference to "R Cookbook" by P. Teetor.] Me: Teetor's book is not authoritative, and the other reference doesn't discuss ambiguous alternation. ... finally we get to the interesting part ... ChatGPT: I apologize for the mistake in my previous answer. A more authoritative reference for the behavior of regular expressions i...

...buntu 20.04 is an LTS release, and (3) ARM is a supported architecture, or so I thought. Paul PS - Yes, the ARM processors in question are a Raspberry Pi cluster. Don't snicker. Hey, it's got 16 cores, 16 GB RAM total, and a terabyte of space. And it's paid for, no monthly fee. Paul Teetor, Elgin, IL USA

...p(), it doesn't matter which of a or b matches. It's only in sub() or gsub() that it makes a difference. Do you know an authoritative reference that discusses those functions? > > ChatGPT: [long irrelevant answer about sub and gsub, with a reference to "R Cookbook" by P. Teetor.] > > Me: Teetor's book is not authoritative, and the other reference doesn't discuss ambiguous alternation. > > ... finally we get to the interesting part ... > > ChatGPT: I apologize for the mistake in my previous answer. > > A more authoritative reference for...

...the shorter vectors.  I think I'm missing something quite basic.   v1 <- c(1,2,3,4) v2 <- c(1,2) lst1 <- list(v1,v2)   Of course there is the intuitive:   as.data.frame(lst1)   However, the recycling rule (expectedly) reclycles 1,2 versus using NAs as placeholders.   Then, looking into Teetor's R Cookbook, there is a piece of code that looked (from the description) like it might do the trick:   do.call(rbind, Map(as.data.frame,lst1)   But I get the error: Error in match.names(clabs, names(xi)) :   names do not match previous names   Thinking the source of the error had to do with t...

I want to create individual data.frames for each of the 8 param factors in chemdata. The syntax I tried (based on Teetor's book, page 132) and R's response are: > ars <- subset(chemdata, select=c(site,sampdate,param,quant), subset=(param = "As")) Error in subset.data.frame(chemdata, select = c(site, sampdate, param, : 'subset' must evaluate to logical I'm asking for column...

...-project.org/doc/bib/R-books.html), but I cannot find instructions for doing that. Can anyone tell me, whom should I contact in order to add a new book? (I added the title to the wiki's list of books, but the bibliography and the list don't seem to be connected.) Thank you! Paul Paul Teetor Elgin, IL USA http://www.linkedin.com/in/paulteetor "For quant traders, there are no bad days in the market. It's just more data."

...eated because I couldn't do the first time and certainly couldn't do it after that. Help with any/all snags would be very appreciated. I'm a 2 1/2 month [R] user who's reading everything online (incl. manuals) & ordering every book I can (looking at Dalgaard, Crawly's and Teetor's very helpful books right now). Loops and their usage is a foreign thing to me, despite studying them, and unfortunately I think that my function may call for them. I also realize that beyond 10 predictors may make this function way to bulky. I'm running the latest version of R (2.12.2...

On 15 July 2020 at 14:03, Paul Teetor wrote: | Dear R-SIG-Debian folks, | | I seem to be chasing my tail, despite having a simple goal: | | - Install R 4.0.2 | - On Ubuntu 20.04 | - For an ARM processor (not Intel/AMD). | | Can someone please suggest a Debian/Ubuntu repository of the required packages (e.g., r-base-core) built for A...

On 15 July 2020 at 19:44, Paul Teetor wrote: | Hmmmm. Perhaps I'm using the wrong terminology. My logic is: (1) I am running Ubuntu focal on the cluster. I am with you so far. | (2) Ubuntu focal is built on Debian bullseye but Not really. Ubuntu does their own thing, and their own snapshots. There is no relationship to Debian _...

...s, including: getting started, data structures, input and output, general statistics, graphics, linear regression, useful tricks, and more. I hope you find it useful. Paul PS - This announcement is shamelessly self-serving since I am the author. I apologize if I have offended anyone. Paul Teetor Elgin, IL USA http://www.linkedin.com/in/paulteetor "For quant traders, there are no bad days in the market. It's just more data."

...l99) and wins (http://bit.ly/9PdD5C) a major Open Source award in New Zealand. An article in InfoWorld notes that R is "a programming language on the rise": http://bit.ly/aLLdU9 O'Reilly has published a "Rough Cuts" preview of the forthcoming "R Cookbook" by Paul Teetor: http://bit.ly/cUC5da Revolution Analytics names Lee Edlefsen as Chief Scientist: http://bit.ly/a9b7zc Other non-R-related stories in the past month included the Data Science Venn Diagram (http://bit.ly/d5AzgN), busting gay stereotypes with data analysis (http://bit.ly/aRza7H), World Statistics D...

Greetings, I'd be grateful if a good Samaritan helps me to approach this problem.... with my data, I've created the following model lm(formula = OUTCOME ~ VAR1 + VAR2) summary(model) Call: lm(formula = OUTCOME ~ VAR1 + VAR2) Residuals: Min 1Q Median 3Q Max -1.4341 -0.3621 0.1879 0.4994 0.7696 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 1.89020

2 years ago at one Meetup in Paris, Marc Girondot, professor at University Paris-Saclay, presented his cluster built with 12 Odroid (equivalent to Rapsberry Pi). The stack was almost the same size than your picture as there was no fan and a narrower distance between each PCB card. There were many more cables. For a total cost of less than 1000 ? and an electrical consumption reduced by a

...schoolers celebrate World Statistics Day with R: http://bit.ly/ubU4fE I posted slides from my presentation "100% R and More" on the features Revolution R Enterprise adds to open source R: http://bit.ly/ugQlse A profile of quantitative developer and author of "R Cookbook", Paul Teetor: http://bit.ly/sMYRsC A report from the ACM Data Mining Camp includes several applications of R: http://bit.ly/vIq96a A list of the "Top 50 Statistics Blogs" includes several that post content related to R: http://bit.ly/uk8kio Antonio Piccolboni gave a presentation to the Bay Area R U...

Marta, Seguramente, al desconocer tu objetivo, no te servirá de mucho lo que te diga. No se si quieres escribir un paquete para mapas o simplemente hacer un mapa con la librería ggmap sin preocuparte de la magia interna. Si lo que necesitas es lo segundo puede que te sirva el siguiente ejemplo: http://journal.r-project.org/archive/2013-1/kahle-wickham.pdf