Solving logical expressions with if statement

Question

Asim Ismail 2017-5-13

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评论： Stephen23 2017-5-13

I am solving some conditions having logical expressions with 'if'statement, but these conditions are little complex, so using if statement every time will make it more complicated to understand. So can someone please suggest me another way to solve it?

 a = rand(10,2);
b = [1 4 7 10];

Condition:

if any number from first column of 'a' is less than or equal to the first column of 'b' and less than second column of 'b', and if any number from second column of 'a' is greater than or equal to the first column of 'b' and less than second column of 'b', then import these numbers from matrix 'a' and store them in a new matrix (lets say 'result').

a(:,1) >= b(1,1) and < b(1,2) and if a(:,2) >= b(1,1) and < b(1,2)

I have 8 more conditions like this.

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Answer 1

Jan 2017-5-13

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编辑：Jan 2017-5-13

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Then the 3rd and 4th column of b are not used?

a = rand(10,2);
b = [1 4 7 10];
Index  = (a(:,1) >= b(1,1) & a(:,1) < b(1,2) & ...
          a(:,2) >= b(1,1) & a(:,2) < b(1,2));
Result = a(Index, :);

Or:

Index = all(a(:,1:2) >= b(1,1) & a(:,1:2) < b(1,2), 2);