repmat

Repeat matrix

Usages

repmat(A, m)

• A should be an array. It duplicates and tiles A m times in the first (row) and second (column) dimensions of A.
• If m is zero, it returns an empty array.

repmat(A, s1, s2, ..., sn)

• A should be an array, and s1, s2, ..., sn are non-negative integers, not equal to Inf nor NaN. It duplicates and tiles A in the 1st, 2nd, ..., n-th dimensions s1, s2, ..., sn times, respectively. If any of s1, s2, ..., sn is zero, it returns an empty array.

repmat(A, s)

• A should be an array, and s is a vector with non-negative integers s1, s2, ..., sn not equal to Inf nor NaN. It duplicates and tiles A in the 1st, 2nd, ..., n-th dimensions s1, s2, ..., sn times, respectively. If any of s1, s2, ..., sn is zero, it returns an empty array.

Example

• Duplicating the rows and columns of a 3D array. The length of the 3rd dimension remains unchanged.

Input

r = rand(2,3,4)
rr = repmat(r,2)

Output

r(:, :, 1) = 1e-1 ×
 5.5763   2.6253   5.0971
 3.0160   4.5756   5.0649

r(:, :, 2) = 1e-1 ×
 9.1791   3.8848   6.9729
 2.2900   3.8805   2.2782

r(:, :, 3) = 1e-1 ×
 8.1343   8.4280   2.0847
 1.9063   8.2422   7.4617

r(:, :, 4) = 1e-1 ×
 5.5381   2.0987   1.4030
 5.6323   1.0009   6.2362
 
rr(:, :, 1) = 1e-1 ×
 5.5763   2.6253   5.0971   5.5763   2.6253   5.0971
 3.0160   4.5756   5.0649   3.0160   4.5756   5.0649
 5.5763   2.6253   5.0971   5.5763   2.6253   5.0971
 3.0160   4.5756   5.0649   3.0160   4.5756   5.0649

rr(:, :, 2) = 1e-1 ×
 9.1791   3.8848   6.9729   9.1791   3.8848   6.9729
 2.2900   3.8805   2.2782   2.2900   3.8805   2.2782
 9.1791   3.8848   6.9729   9.1791   3.8848   6.9729
 2.2900   3.8805   2.2782   2.2900   3.8805   2.2782

rr(:, :, 3) = 1e-1 ×
 8.1343   8.4280   2.0847   8.1343   8.4280   2.0847
 1.9063   8.2422   7.4617   1.9063   8.2422   7.4617
 8.1343   8.4280   2.0847   8.1343   8.4280   2.0847
 1.9063   8.2422   7.4617   1.9063   8.2422   7.4617

rr(:, :, 4) = 1e-1 ×
 5.5381   2.0987   1.4030   5.5381   2.0987   1.4030
 5.6323   1.0009   6.2362   5.6323   1.0009   6.2362
 5.5381   2.0987   1.4030   5.5381   2.0987   1.4030
 5.6323   1.0009   6.2362   5.6323   1.0009   6.2362