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|is a numerical vector. Which ONE of the following best describes what the R code below will calculate? sum(!is.na(y))

|is a numerical vector. Which ONE of the following best describes what the R code below will calculate? sum(!is.na(y))

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The vector y is a numerical vector. Which ONE of the following best describes what the R code below will calculate?  

sum(!is.na(y))

A logical vector of the same length as the vector y, which takes the value TRUE for values in y which are NOT missing and FALSE for values in y which ARE missing.
 
Replaces each value in y with TRUE if it is not missing and FALSE if it is missing
 
The number of non-missing values in the vector y.
 
The number of missing values in the vector y.
 
The propostion of non-missing values in the vector y.
The vector y is a numerical vector. Which ONE of the following best describes what the R code below will calculate? sum ( !is.na(y))] O A logical vector of the same length as the vector y, which takes the value TRUE for values in y which are NOT missing and FALSE for values in y which ARE missing. O Replaces each value in y with TRUE if it is not missing and FALSE if it is missing O The number of non-missing values in the vector y. The number of missing values in the vector y. O The propostion of non-missing values in the vector y.
Transcribed Image Text:The vector y is a numerical vector. Which ONE of the following best describes what the R code below will calculate? sum ( !is.na(y))] O A logical vector of the same length as the vector y, which takes the value TRUE for values in y which are NOT missing and FALSE for values in y which ARE missing. O Replaces each value in y with TRUE if it is not missing and FALSE if it is missing O The number of non-missing values in the vector y. The number of missing values in the vector y. O The propostion of non-missing values in the vector y.
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