How to separate a vector every fifth element?

Question

i have a vector

a<-as.vector(diag(5))

How to separate this vector every 5 numbers and create a data.frame by joining each in a row? my idea is to do this https://imgur.com/X7JLMYH one column, each row of that column as if it were diag (5). Each line will identify a different object, so you need to follow the image order. length must equal number of numbers within each line

Answer 1

We can use matrix (as the length is already a multiple of 5) and then wrap with as.data.frame

as.data.frame(matrix(a, ncol = 5, byrow = TRUE))

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If we want as a single column of strings, can paste each row to create that single column data

data.frame(col1 = do.call(paste, as.data.frame(matrix(a, ncol = 5, 
       byrow = TRUE))))

Or place it as a list column

data.frame(col1 = I(asplit(matrix(a, ncol = 5, byrow = TRUE), 1)))