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How to extract sub matrix from the main matrix?

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MAHMOUD ALZIOUD
MAHMOUD ALZIOUD 2019-3-8
评论： MAHMOUD ALZIOUD 2019-3-12
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

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KALYAN ACHARJYA
KALYAN ACHARJYA 2019-3-9
编辑：madhan ravi 2019-3-9
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
  1 个评论
MAHMOUD ALZIOUD
MAHMOUD ALZIOUD 2019-3-12
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

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