Sometimes, you don't need to run through the whole body of a function to get the answer. In that case you can return early from that function using return(). To check if x is divisible by n, you can use is_divisible_by(x, n) from assertive. Alternatively, use the modulo operator,...
IfRcannot figure out how to coerce an object, this can result in NAs being produced always numbers -> other data type R objects have attributes(metadata for object) Not all R objects contain attributes, in which case theattributes()function return NULL 5.2 Matrix m <- matrix(1:9, nrow=3...
Consequently, the concept of agribusiness, which was originally introduced in the 1950s at the time of Fordist agriculture in the USA, has had to mutate in order to encapsulate agricultural production based on business-friendly state interventions, policy liberalization, and the dominance of ...
In aprevious post, we reviewed how to import daily prices, build a portfolio, and calculate portfolio returns. Today, we will visualize the returns of our individual assets that ultimately get mashed into a portfolio. The motivation here is to make sure we have scrutinized our assets before th...
It is often set in claustrophobic spaces, either real or imaginary. One of its most prominent features is its ability to mutate and adapt to different times and spaces, becoming an effective reflection of societal fears. The Gothic is above all a hybrid mode: it often appears in collaboration...
In this chapter, you'll learn to do three things with a table: filter for particular observations, arrange the observations in a desired order, and mutate to add or change a column. You'll see how each of these steps allows you to answer questions about your data. View Details The gapmi...
chap03-tidyverse02-tidyr.md chap03-tidyverse03-stringr.md chap03-tidyverse04-lubridate.md chap03-tidyverse05-rvest.md chap04-Rplots01-introduction.md chap04-Rplots02-parameter.md chap04-Rplots03-layout.md chap04-Rplots04-statistics.md
here is a brief introduction to a few basic survival concepts and their mathematical expressions. You don’t strictly need to know these formulas to conduct an analysis using packages in R. This would be of interest to those who prefer to peek a little under the hood to see some of the ...
tidyr Set of functions to create tidy data stringr Function set to work with characters readr An easy and fast way to import data forcats Tools to easily work with factors In addition to the mentioned packages, lubridate is also used very frequently to work with dates and times, and also ...
Journal of Proteomics & Bioinformatics- Open Access www.omicsonline.com Research Article JPB/Vol.2/August 2009 MUTATER: Tool for the Introduction of Custom Position Based Mutations in Protein and Nucleotide Sequences 来自 Citeseer 喜欢 0 阅读量: 22 作者: AMBA Ahmed 年份: 2014 ...