How can I index multiple, nonsequential, nonlinearly spaced values?

How would I go about indexing the first, sixth, and seventh numbers in an array all with one command?

Answer 1

[Star Strider]

Use a vector of indices to address them in any order you want:

V = randi(9, 1, 10);
R1 = V([1 5 9]);
R2 = V([6 2 8]);

The same goes for matrices. You ideally should have a separate vector of indices for each array dimension, but since matrices are also addressed linearly, you can also address them using the ind2sub function and its friends. See the documentaiton on Matrices and Arrays for more details.

Answer 2

[Linna He]

array([1 6 7])