Efficient way/best practice to slice array under a logical condition as well as other conditions

I did not know how to properly title this question, so please bear with me.

Simply put, with the following two arrays:

A = [0 1 0 1 0 0 0 1]'
B = [800    1	1	60;
    900	    3	0	30;
    900	    4	0	30;
    900	    6	0	30;
    900	    7	0	30;
    900	    11	0	30;
    900	    1	2	60;
    1000    1	2	60;
]

Note that A and B have the same number of columns.

I would like, for example, to slice B under the following constraints:

• A == 1
• B(:,3) ~= 0
• Keep only columns [2 3 4] of B

This is the way I am doing it at the moment:

B_sliced = B(A==1 & B(:,3)~=0,[2 3 4]);

Alternatively, one could do:

B_sliced = B(logical(A) & B(:,3)~=0,[2 3 4]);

With tic toc and large matrices, I am not noticing much of a difference in performance.

Is there a best practice regarding combining logical with non-logical conditions? Should I keep something in mind, or it doesn't really matter which way I go? Is there a way to make any of these more efficient by using "find"?

I hope you can enlighten me a bit! Thanks.

[Bruno Luong]

Don't split the hair, it doesn't really matter.

Just do the way te code looks most readable to you.

Answer 1

[madhan ravi]

What you have is more efficient.