How to extract sub matrix from the main matrix?

Dear All, I have a numerical matrix of three columns, (Year, Month and Day), but each days does not have the same number of rows as another day, how can I tell MATLAB please to extract a matrix from the main one based on the 2nd & 3rd column value? for example I attached the file, what is the code to extract the matrix from 1/1/2010 to 2/3/2010? please see the excel file

[Andrei Bobrov]

Question.xlsx - empty file.

[MAHMOUD ALZIOUD]

here it is

Answer 1

[KALYAN ACHARJYA]

What I have found that there is no data as 2/3/2010.

Suppose I take as example your exel file having

Row 1: 10 1 1
...
..
Row 46: 10 2 4

Supose you want access the some portion of the excel file (2,2) to (10,3)-Submatrix includes the elements having inbetween,

it goes this way

filename='Question.xlsx';
data=xlsread(filename); 
Data=data(2:10,2:3)

Output:

Data =

     1     1
     1     1
     1     1
     1     1
     1     1
     1     2
     1     2
     1     2
     1     2

[MAHMOUD ALZIOUD]

this can be done if i have small datab but actully i have 1.2 million rows of data and i cannot do this manually