using "find" to find the index of value that is occuring a number of times

my data is like this i want the index no where my repeating value ends first column has hrs and second column has its corresponding data.

clear all;
close all;
clc;
t=59/60;
file1=xlsread('jan fof2.csv');
dat_fof2=sortrows(file1);

for i=0:24
 hr(i+1,:)=((t+i)/24);
 if i==24
     hr(i+1)=1;
 end
end

for k=1:25
indx2(k,1)=max(find(dat_fof2(:,1)<=hr(k,1)));
end

this routine worked for previosuly in another program and now it is giving me dimension error. help needed urgently how do i find index no for my value using loop? how do i remove this dimension error?