Problem 2012. Tony's trick for duplicating an mx1 vector n times
Without using repmat, or for loop, or concatenation, create a function to duplicate a vector, v, a specified number of times, n. v can be numeric or character. n may be 0.
Examples
If
v = 5; n = 3;
then return v1:
v1 = [5 5 5]
If a 2d matrix is supplied then the vector v will be the first column.
V = magic(4); n = 4;
then v and v1 are returned as shown below.
v = [16 5 9 4]' v1 = [16 16 16 16; 5 5 5 5; 9 9 9 9; 4 4 4 4]
Hint: use indexing
Solution Stats
Problem Comments
-
2 Comments
James
on 27 Nov 2013
When did the functionality of linspace change to give an empty 1-by-0 matrix for n=0? My version is very old (R14, SP3 from 2005), and the command "linspace(1,1,0)" gives 1. Just curious.
Ted
on 29 Nov 2013
hi - not sure, but it is similar in behaviour to ones(1,0), nan(1,0) etc
Solution Comments
Show commentsProblem Recent Solvers52
Suggested Problems
-
1240 Solvers
-
603 Solvers
-
714 Solvers
-
230 Solvers
-
488 Solvers
More from this Author11
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!