How to full vectorize this?

How to full vectorize this?

I write this little piece of code to syncronize two financial time series.
I download some forex data and there are some missing trades. The ideia
here is to get the biggest set and syncronize the others with this one.
For example i have a set with like this
a= [20010110 2310 10;
20010110 2311 20;
20010110 2313 30]
b= [20010110 2309 50;
20010110 2312 52]
and i want then i get this
c =[20010110 2310 50;;
20010110 2311 50
20010110 2313 52]
c is pretty much the same thing as a, but this is only a index.
so i write this
function [setAjustado] = ajustar(SetCorreto,SetParaAjustar)
dataCorreto = SetCorreto(:,1); % get the date from the correct set
dataAjustar = SetParaAjustar(:,1); % get the date from the set to be
corrected
minCorreto = SetCorreto(:,2); % get the timeframe from the correct set
minAjustar = SetParaAjustar(:,2);get the timeframe from the set to be
corrected
setAjustado = zeros(size(SetCorreto)); %corrected set
idxI = dataAjustar == dataCorreto(1); %generating the first range to
search
for i=2:size(SetCorreto,1)
try
if (i >1 && dataCorreto(i) ~= dataCorreto(i-1)) % if the dates are
the same, i dont need to look for the range again
idxI = dataAjustar == dataCorreto(i); % generate the range to search
idxIa = find(idxI==1,1); % find the first index
end
idx = find(minAjustar(idxI)>=minCorreto(i),1) +idxIa; % find the
nearest occurency in the set to be corrected to match the correct
set
setAjustado(i,:) = SetParaAjustar(idx,:); %replace all the line.
This line have prices close, max, low and open.
setAjustado(i,2) = minCorreto(i); %adjust the timeframe to match
the correct set
catch
if i==1 % in case of i to be greater then the size of set to be
corrected
a=i;
else
a= i-1;
end
setAjustado(i,:) = setAjustado(a,:); % will copy the last line
created in corrected set
end
end
But im thinking this thing is pretty slow... Can someone help me to speed
this thing?
Tks in advance!