Find the first value that is greater than or equal to and its corresponding value

A table from an .txt file is imported. It looks like this (say first column as x and second as y)

0.01 3

0.02 4

0.03 6

0.04 9

0.05 12

0.06 14

0.07 15

0.08 18

How to find the first value in column y that is greater than or equal to 10 and find the corresponding x value (PS: Both x and y are increasing as it goes down)

Answer 1

[Chunru]

data =[
0.01    3  
0.02    4    
0.03    6   
0.04    9
0.05    12
0.06    14
0.07    15
0.08    18];

idx = find(data(:,2)>=10, 1, 'first')

idx = 5

x = data(idx, 1)

x = 0.0500