Get the inbetween values or the closest value

Hi,

I have a matrix a that contains two columns; 1st column is starting point and second column is ending. I have a vector b and for each element of vector b i want to get the starting and ending point it belongs to.

let's say for b=11321.56 , i should get a= 11320.17569 - 15096.09968 as this value comes in between these values

I tried to get the closest value with following code

format long
a=load('data.csv');
b= [11321.56; 15096.23; 19321.76; 65298.26; 94645.23];
for i =1:length(b)
    v = b(i);
    [~,closestIndex] = min(abs(a-v));
    index1(i) = min(closestIndex);
end

The answer should be

index1 = 4 5 6 18 25

But i am getting the wrong answer. What can i do more?

P.S: Data is attached. Also this is just the small data

Answer 1

[Star Strider]

The find function is perfect for this:

for i =1:length(b)
    closestIndex(i) = find((b(i) >= a(:,1)) & (b(i) < a(:,2)));
end

closestIndex =
     4     5     6    18    25