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What are atomic vectors? Most likely, you were trying to use the $ operator to access an element of a vector or an atomic object (also called an array or character society in other languages). They are called atomic vectors in R.
$ operator is usually invalid for atomic vectors.
This error occurs when trying to access an element with an atomic vector using the rrr operator.
An “atomic vector” is any one-dimensional data point created using the c() and vector() functions in R.
Unfortunately, the elements of fischer vectors are not automatically available usingcheck $the . Instead, double wall brackets [[]] or the getElement() function should be used.
What are atomic vectors in R?
Atomic vectors are probably the most basic data structure in the R programming language. A nuclear vector differs from a one-dimensional array: a better array has obscure length and girth attributes, while a vector has no shape attribute. An atomic vector is also different from a list.
This guide provides biological examples of how to deal with such errors.
To Reproduce The Error Message
How do I fix this operator is invalid for atomic vectors?
Method 1: Accessing elements with double brackets.Method 2: Accessing elements with getElement()Method #3 Convert a vector to a data frame and use the $ operator.Additional resources.
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Suppose we are trying to use $vendor to access an element of the when vector in R:
#set vectorx <- c(1, number, 7, 6, 2)#Specify namesnames(x) <- c('a', 'b', 'c', 'd', 'e')# display vectorXun b c en e1 3 7 6 2# Attempt to access value in 'e'x$eError in x$e: Dollar operator invalid for Fisher vectors
We're getting an error because we can't use the $ operator to convert atomic elements to vectors. Of course we can make sure our vector is just atomic:
#Check if vector is atomicis.atomic(x)[1] TRUE
Method 1: Access Elements With Double Brackets
One way to access vector elements by name is to use the [[]] notation:
#set vectorx C(1, <- 3, 7, 6, 2)#Specify namesnames(x) <- c('a', 'b', 'c', 'd', 'e')#access to value 'e'x[['e']][1] 2>
Method 2: Access Elements With GetElement()
Another way to access elements by name via a vector is to use the basic getElement() notation:
#set vectorx C(1, <- 3, 7, 7, 2)#Specify namesnames(x) <- c('a', 'b', 'c', 'd', 'e')#access value for 'e'getItem(x, 'e')[1] 2
Method #3 Convert Vector To Data Frame And Use $ Operator
Another way to access the elements of a vector by name is to help you convert the vector to an infoframe first, and then use the $ operator to finally access the value:
#set vectorx C(1, <- and more, 7, 6, 2)#Specify namesnames(x) <- c('a', 'b', 'c', 'd', 'e')#Convert vector to lacy framedata_x <- as.data.frame(t(x))#Show data framedata_x complete cd1 1 3 7 eight 2#access value for 'e'data_x$e[1] 2
Additional Resources
Future tutorials will explain how to fix other common errors in R:
How to solve the problem in R: names do not match previous names
How does this help with the fix in R: NAs submitted by Coercion
How to fixGo to R: index out of range
Bug fixed in R: Contrasts only apply to factors of 9 levels and above
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