CODEWITHSUNDEEP
rvectorsyntaxsum
bricevk
bricevk

Reputation: 207

How to sum values that all have the same beginning in R

Suppose I have created 3 values in R

brice1 <- 55
brice2 <- 10
brice3 <- brice1 * brice2

I now want to sum all of them.

brice_total <- brice1 + brice2 + brice3

BUT, I don't want to type out every variable. How would I tell R to sum all variables that begin with "Brice". For instance, in STATA a * indicates an ambiguous ending, so I could do something like

egen brice_total = sum(brice*)

I need to do the same thing in R because I need to sum a long list of values that all start with the same string of characters.

Upvotes: 0

Views: 79

Answers (1)

akrun
akrun

Reputation: 887291

We can get values of all the objects with names that starts (^) with 'brice' followed by one or more digits (\\d+) till the end of the string ($) in a list and Reduce with + to get the sum in base R

Reduce(`+`, mget(ls(pattern = '^brice\\d+$')))

Upvotes: 1

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