Building a nested vector in Clojure

Question

My goal is to build a nested vector of dimension n consisting of a single element p. As an example let me choose n=2 and p=1, so the output would be:

   [[1 1] [1 1]]

And what if `n=3`? I'm not sure what you meant by `nested vector of dimension n`. — Leonid Beschastny, Dec 18 '13 at 18:20
The input n is the row and column dimension of the matrix. In the case `n=3` `[[1 1 1] [1 1 1] [1 1 1]]` — sunspots, Dec 18 '13 at 18:22

score 4 · Accepted Answer · answered Dec 18 '13 at 18:23

4

Probably, you want something like this:

(defn square-matrix [n p]
  (->> p (repeat n) (repeat n)))

Or, if you need vectors (not seqs):

(defn square-matrix [n p]
  (->> p (repeat n) vec (repeat n) vec))

answered Dec 18 '13 at 18:23

Leonid Beschastny

score 4 · Answer 2 · answered Dec 18 '13 at 18:23

4

I think what you want is (->> p (repeat n) vec (repeat n) vec).

answered Dec 18 '13 at 18:23

Chuck

score 0 · Answer 3 · answered Dec 18 '13 at 18:24

0

(defn vec-of-dim [n e]
  (->> (repeat n e)
       (into [])
       (repeat n)
       (into [])))

answered Dec 18 '13 at 18:24

mishadoff

3 Answers3