Combine values of many elements into a single element

Hello,

Consider a matrix A 100x7:

1 NaN 2 0 1 6 5

1 NaN 2 0 1 1 4

....

How can I form a new matrix 100x1 that takes the columns A(3:6) and combines them into a single element?

The new matrix should have 1 column:

2016

2011

...

Thank you.

Pavlos

Answer 1

[Jan]

A = [1 NaN 2 0 1 6 5; ...
     1 NaN 2 0 1 1 4];

R = A(:, 3:6) * [1000; 100; 10; 1];