Question

Consider the array A
A = 3 5 -4
-8 -1 33
-17 6 -9
Write a programme that computes the array B by computing the natural logarithm of all the elements of A whose value is no less than 1, and adding 20 to each that is equal to or greater than 1. Do this by using a logical array as a mask. [this should be done using matlab ]

Answer 1

I think you will get better help if you post this question in the Computer Science section.

Answer 2

@UnkleRhaukus

Answer 3

ok

Answer 4

also, :
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Answer 5

A=[3,5,-4;-8,-1,33;-17,6,-9]; % array A
B=zeros(3,3); % array B (initially empty)
for n=1:9 % number of elements
if A(n)<1 % when the ellement is less than one
B(n)=A(n)+20; % add twenty
else % for everything else
B(n)=log(A(n)); % take the the natural log
end
end
B % display