How can I find everything between two values?

let's say I have the array and I was given another 2 X N array for the location of a value in the array

• a b c d
• e f g h
• i j k l
• how do I find values between two values using for loop, for example: how to I find 'e' if I was given the location of a&i, and find'b c' with the location of a and d. The two known values will always be in the same row or column.

Answer 1

[Image Analyst]

Try this, with your two coordinates (row1, col1) and (row2, col2)

if row1 == row2 % Rows are equal
    output = m(row1, col1+1:col2-1);
else % Columns are equal
    output = m(row1+1:row2-1, col1);
end

You'll have to check and make sure that 1 and 1 are not the same row and column so that there is actually something in between them. And make sure that 2 has larger columns or rows than 1. I didn't put in that kind of pre-validation of the row and column indexes but it's easy to do.

[Yunming Zhang]

The thing is I don't know which value is going to be in front/top or back/bottom how would I do that?

[Image Analyst]

Like this:

% Make sample data with row1 and row2 not in order
row1 = 10
row2 = 5
% Put them in order
[row1, row2] = deal(min(row1,row2), max(row1, row2))

[Yunming Zhang]

what if I want to go left to right as well as right to left?

[Image Analyst]

What does that mean? If you just want row1 to be the max instead of the min, just swap min and max inside deal().