Finding start and end point of array from csv

I am trying to set the starting and ending point of x from a csv file when y = 1. How do I do it?

RawDataTable = readtable('blabla.csv');
lengthRawDat = height(RawDataTable);

% Convert raw data
Raw_x = table2array(RawDataTable(:,1));
Raw_y = table2array(RawDataTable(:,2));

Thank you very much!

Answer 1

[KSSV]

idx = find(Raw_y==1) ;
[idx(1) idx(end)]

[Michael Arvin]

is it possible to find the start and end point of an approximate value, like for example 1 +/- 0.1? If so, how?