In R, how to count TRUE values in a logical vector

In R, how to count TRUE values in a logical vector



1.r - Counting the Number of Elements With The Values of x ...

Description:My preferred solution uses rle, which will return a value (the
label, x in your example) and a length, which represents how many times
that value appeared in sequence.



2.R Language Definition - Cran

Description:1 Introduction. R is a system for statistical computation and
graphics. It provides, among other things, a programming language, high
level graphics, interfaces to ...



3.R & Bioconductor - Manuals

Description:ls() or objects() # Lists R objects created during session,
they are stored in file '.RData' when exiting R and the workspace is
saved. rm(my_object1, my_object2, ...)



4.R: Pearson's Chi-squared Test for Count Data

Description:Pearson's Chi-squared Test for Count Data Description.
chisq.test performs chi-squared contingency table tests and
goodness-of-fit tests. Usage chisq.test(x, y = NULL ...



5.Bit Twiddling Hacks - Stanford University

Description:Compute the integer absolute value (abs) without branching int
v; // we want to find the absolute value of v unsigned int r; // the
result goes here int const ...



6.R: Data Input - ETH Zürich

Description:Details. This function is the principal means of reading
tabular data into R. Unless colClasses is specified, all columns are read
as character columns and then ...



7.Boolean algebra - Wikipedia, the free encyclopedia

Description:In mathematics and mathematical logic, Boolean algebra is the
subarea of algebra in which the values of the variables are the truth
values true and false, usually ...



8.Epistemology - Wikipedia, the free encyclopedia

Description:Epistemology is the branch of philosophy concerned with the
nature and scope of knowledge and is also referred to as "theory of
knowledge". It questions what ...



9.Statistical Computing with R: A tutorial - Welcome to the ...

Description:0.1. What is R? R is a software package especially suitable
for data analysis and graphical representation. Functions and results of
analysis are all stored as ...



10.R commands - personality-project

Description:A short list of the most useful R commands. A summary of the
most important commands with minimal examples. See the relevant part of
the guide for better examples.