How do I sample a matrix in MATLAB?

Question

I have a matrix in MATLAB from which I want to sample every other entry: ``` a = 1 5 9 13 2 6 10 14 3 7 11 15 4 8 12 16 ``` And I want: ``` result = 1 9 3 11 ``` How can I do this without a for loop?

Accepted Answer

I don't know of a multi-dimensional way to do it automatically, but Matlab's indexing is good enough if you're happy to specify it for each dimension:

```
a(1:2:end,1:2:end)
```

How do I sample a matrix in MATLAB?

Solution

Problem