finding maximum value of a column

so i have this matrix 193X2 where column 1 is the time and column 2 is cars counted i want to find THE TIME where the maximum car is counted can someone help me?

Answer 1

[Walter Roberson]

[~, idx] = max(YourMatrix(:,2));
THE_TIME = YourMatrix(idx,1);

[Tony Garcia]

thanks for the solution.. it works, but can you explain me what does [~, idx] means?

[Walter Roberson]

That is the same as

[SomeVariableNotOtherwiseUsed, idx] = max(YourMatrix(:, 2))
clear SomeOtherwiseUnusedVariableName