- How do I count repeated values in R?
- What is length r?
- Is true in R?
- How do you calculate percentages in R?
- What does the Which function do in R?
- What is a logical vector in R?
- What is Summarise in R?
- Is there a count function in R?
- What is NROW function in R?
- How do you find out the percentage?
- What is mutate in R?
- How do you find the percentage of a group of data?
- How do I use complete cases in R?
- What does NCOL mean in R?
- How do I count true values in R?

## How do I count repeated values in R?

You can use the table function in R to get the count of each duplicated gene.

This gives you a data.

frame of the number of duplicates for each ID..

## What is length r?

length() function gets or sets the length of a vector (list) or other objects. … length() function can be used for all R objects. For an environment it returns the object number in it. NULL returns 0. Most other objects return length 1.

## Is true in R?

isTRUE() returns TRUE if its argument value is equivalent to TRUE , and returns FALSE otherwise. isTRUE() makes R programming much easier. R now also has isFALSE() , but by design it does not mean the same thing as !

## How do you calculate percentages in R?

To calculate percent, we need to divide the counts by the count sums for each sample, and then multiply by 100. This can also be done using the function decostand from the vegan package with method = “total” .

## What does the Which function do in R?

The which() function will return the position of the elements(i.e., row number/column number/array index) in a logical vector which are TRUE. Unlike the other base R functions, the which() will accept only the arguments with typeof as logical while the others will give an error.

## What is a logical vector in R?

A logical vector is a vector that only contains TRUE and FALSE values. In R, true values are designated with TRUE, and false values with FALSE. … The result is a vector of length 2, which are the values of x for which the logical vector y was true.

## What is Summarise in R?

Source: R/summarise.R. summarise.Rd. summarise() creates a new data frame. It will have one (or more) rows for each combination of grouping variables; if there are no grouping variables, the output will have a single row summarising all observations in the input.

## Is there a count function in R?

The table() function in Base R does give the counts of a categorical variable, but the output is not a data frame – it’s a table, and it’s not easily accessible like a data frame.

## What is NROW function in R?

nrow(data) The nrow R function returns the number of rows that are present in a data frame or matrix.

## How do you find out the percentage?

1. How to calculate percentage of a number. Use the percentage formula: P% * X = YConvert the problem to an equation using the percentage formula: P% * X = Y.P is 10%, X is 150, so the equation is 10% * 150 = Y.Convert 10% to a decimal by removing the percent sign and dividing by 100: 10/100 = 0.10.More items…

## What is mutate in R?

In R programming, the mutate function is used to create a new variable from a data set. In order to use the function, we need to install the dplyr package, which is an add-on to R that includes a host of cool functions for selecting, filtering, grouping, and arranging data.

## How do you find the percentage of a group of data?

Divide using the calculator to find the percentage in decimal form. Divide the top number — the number of pairs of black shoes, — by the total number of shoes, 12. The answer, when rounded, is 0.42. Multiply the decimal by 100, since 12 is 100 percent of the total.

## How do I use complete cases in R?

cases function is often used to identify complete rows of a data frame. We can use complete. cases() to print a logical vector that indicates complete and missing rows (i.e. rows without NA). Rows 2 and 3 are complete; Rows 1, 4, and 5 have one or more missing values.

## What does NCOL mean in R?

ncol returns the number of columns in x@data . I.e. the number of columns with additional information to each spectrum (e.g. “x”, “y”, …

## How do I count true values in R?

2 AnswersTo count TRUE values in a logical vector, you can use the following functions:In vector where there are NA values:The length function counts the return value of NA’s as a TRUE value.In vectors having no TRUE values:So the best solution to count TRUE values is to use the sum() function along with the na.More items…•