Search results
Aug 14, 2009 · 471. They're different characters. \r is carriage return, and is line feed. On "old" printers, \r sent the print head back to the start of the line, and advanced the paper by one line. Both were therefore necessary to start printing on the next line. Obviously that's somewhat irrelevant now, although depending on the console you may still ...
Introduction. R is a free, open-source programming language designed specifically for data mining, statistical analysis, data visualization, and machine learning. R’s capacity for visualizing data makes it popular with data scientists and data analysts. Making sense of data can be tricky, and it helps to have graphs, charts, and images when ...
It is a physical constant that is featured in many fundamental equations in the physical sciences, such as the ideal gas law, the Arrhenius equation, and the Nernst equation . The gas constant is the constant of proportionality that relates the energy scale in physics to the temperature scale and the scale used for amount of substance.
By default, R regex will match any part of a provided string. We can change this behavior by specifying a certain position of an R regex pattern inside the string. Most often, we may want to impose the match from the start or end of the string. For this purpose, we use the two main anchors in R regular expressions:
The operators <- and = assign into the environment in which they are evaluated. The operator <- can be used anywhere, whereas the operator = is only allowed at the top level (e.g., in the complete expression typed at the command prompt) or as one of the subexpressions in a braced list of expressions.
DataCamp’s R resources include: In-depth and easy to understand R guides and cheat sheets. DataCamp Signal™ where you can test your R skills on a range of assessments. Practice projects to help solidify what you’ve learned. Guided projects where you’ll use R to interpret real-world data.
Basically, the result is (1:length(x))[x] in typical cases; more generally, including when x has NA 's, which(x) is seq_along(x)[!is.na(x) & x] plus names when x has. If arr.ind == TRUE and x is an array (has a dim attribute), the result is arrayInd(which(x), dim(x), dimnames(x)), namely a matrix whose rows each are the indices of one element ...
