Yesterday I tried to insert some more R code into knime. scatterplot smoothed density library("geneplotter")  ## from BioConductor require("RColorBrewer") ## from CRAN x1  [Read more...]

So today I’m going to follow another R-course which is supposed to tell me more about Flowcytometry in R. I’ll keep you up to date [Read more...]

The version 0.22 of solaR includes a new method, mergesolaR. It is designed to merge daily time series of several solaR objects. For example, we can obtain the daily irradiation of the whole set of meteorological stations of Madrid (Spain) and use this information to calculate the productivity of a grid ... [Read more...]

[Read more...]

Part 1. Finding alpha. The first question to resolve in Exercise 3 is to pick a good learning rate alpha. This require making an initial selection, running gradient descent and observing the cost function. Read More: 221 Words Totally [Read more...]

Recently I wrote a couple of small functions as a result of work done by myself and others in my lab group. The first is a function that determines what sites in a sequence alignment are ambiguous (i.e. not A, G, C or T). require(ape)data(woodmouse)is.... [Read more...]

If you're planning to attend the worldwide R user conference useR! 2011, don't forget that April 1 (this Friday) is the deadline for submitting abstracts for contributed talks and posters. Early-bird discounts for attendee registrations expire on Friday as well. (Revolution Analytics is a proud sponsor of useR! 2011, and chief scientist Lee ... [Read more...]

(This post got published on The Statistics Forum yesterday.) The short book review section of the International Statistical Review sent me Raquel Prado’s and Mike West’s book, Time Series (Modeling, Computation, and Inference) to review. The current post is not about this specific book, but rather on why ... [Read more...]

Over the last several days, I have had the “pleasure” of getting parallel processing with R running on the the Ohio Supercomputer Center’s (OSC) Glenn cluster. I am working on a project that uses GenMatch from Sekhon’s Matching, which uses … Continue reading → [Read more...]

Today I’m checking which plot function works fastest, I did this via this blogpost. https://www.r-bloggers.com/five-ways-to-visualize-your-pairwise-comparisons/ But I’m not doing this in an Rgui, but in Knime. I read in an example ACS file, ... [Read more...]

[Read more...]

A recent post listed at R Bloggers (https://www.r-bloggers.com/r-guis-which-one-fits-you/) made some erroneous statements about R Commander. Here is a revised description of R Commander with some issues addressed from the earlier blog:R Commander works ... [Read more...]

This is a quick update to some code posted while back, related to plotting filled polygons within a lattice panel function. After attempting to use the originally described function to plot data with NA, I quickly realized that a more robust approach w... [Read more...]

Having wrapped up a recent flurry of R ANOVA articles (and exhausted my knowledge of the subject), I decided to take a look at the R Tutorial Series' Google Analytics data from the past few months. Since I posted the Two-Way Omnibus ANOVA article on J... [Read more...]

Overfitting is a problem when trying to predict financial returns.  Perhaps you’ve heard that before.  Some simple examples should clarify what overfitting is — and may surprise you. Polynomials Let’s suppose that the true expected return over a period of time is described by a polynomial. We can easily ... [Read more...]

Today Left Censored became a contributor to R-Bloggers. If you’ve never heard of it, R-Bloggers is a blog aggregator that brings together R-related posts from a large number of blogs across the Internet. It’s an excellent resource for those who … Continue reading → [Read more...]

In what seems like an endless cuRse, I found this week I had to re-grade a dozen R exams a TA’s did not grade properly! The grades I (X) got are plotted below against those of my TA (Y). There is little connection between both gradings… As if this ... [Read more...]

The gap of the new “digital divide” between those who only use computers when they are as easy to use as iPads and smartphones and those who like (or at least accept) to type commands to perform jobs, seems to get bigger and bigger. R – the lingua franca of statistical ... [Read more...]

R can be used to perform various matrix calculations. This include functions for creating matrices (matrix), addition (+), multiplication (%*%) and inversion (solve). Fast Tube by Casper Other useful resources are provided on the Supplementary Material... [Read more...]

I think I have found a superior solution to integrating Ultraedit and R. See my post over at IDM Users forum. [Read more...]