Question 1: I have a 1x15 array, comprising of positive integers and negative integers. I wish to implement a MATLAB code which keeps all positive integers and skips the cells with negative contents.
I have tried the following:
X = [1 2 3 4 5 -10 1 -5 4 6 8 9 2 4 -2];
[r c] = size(X);
for i=1:r
for j=1:c
if X(i,j)<0
X(i,j)=X(i,j+1)
end
end
end
The output should be:
X_new = [1 2 3 4 5 1 4 6 8 9 2 4]
How do I do this?
Question 2:
X = [1 2 3 4 5 -10 1 -5 4 6 8 9 2 4 -2]
Y = [5 3 8 9 4 5 6 7 4 7 9 5 2 1 4]
From Question 1,
X_new = [1 2 3 4 5 1 4 6 8 9 2 4]
I need to delete the corresponding values in Y so that:
Y_new = [5 3 8 9 4 6 4 7 9 5 2 1]
How do I perform this?
In MATLAB, manipulating arrays and matrices can be done much easier than for-loop solutions, in your task, can do find and delete negative value in the array, simply, as follows:
Idx_neg = X < 0; % finding X indices corresponding to negative elements
X ( Idx_neg ) = []; % removing elements using [] operator
Y ( Idx_neg ) = []; % removing corresponding elements in Y array