# R/nums.R In DescriptiveStats.OBeu: Descriptive Statistics OpenBudgets.eu

#### Documented in nums

```#' @title
#' Select the numeric columns of a given dataset
#'
#' @description
#' Extract and return a data frame with the columns that include only numeric values
#'
#' @usage nums(data)
#'
#' @param data A numeric vector, matrix or data frame.
#'
#' @return This function returns a data frame with the numeric columns of the input dataset.
#'
#' @author Kleanthis Koupidis
#'
#' @examples
#' # with data frame as input
#' nums(iris)
#'
#' # with vector as input
#' vec <- as.vector(iris\$Sepal.Width)
#' nums(vec)
#'
#' # with matrix as input
#' Matrix <- cbind(Uni05 = (1:200)/21, Norm = rnorm(200),
#'         `5T` = rt(200, df = 5), Gam2 = rgamma(200, shape = 2))
#' nums(Matrix)
#'
#' # OpenBudgets.eu Dataset Example:
#' Wuppertal_df
#' nums(Wuppertal_df[,-4])
#'
#' @rdname nums
#'
#' @export

nums<-function(data){

data <- as.data.frame(data)

# Check if all are categorical
stopifnot(all(sapply(data, is.factor) | sapply(data, is.character))==F)

if(ncol(data)>=2){
num <- sapply(data, is.numeric)

data.num <- data[num]

data.num <- as.data.frame(data.num)
} else data.num <- data

return(data.num)
}
```

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DescriptiveStats.OBeu documentation built on Sept. 22, 2017, 5:06 p.m.