Read data form file

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Berbia
Berbia on 10 Jan 2013
I'm trying to read values from the file and store it as a matrix.In the file there is two line space between each matrix values, and each should store as separate matrix. suppose my file has the content,
File vector.mat
1.1 2.2 3.3 4.4 5.5
2.2 3.3 4.4 5.5 6.6
3.3 4.4 5.5 6.6 7.7
6.6 7.7 8.8 9.9 9.9
7.7 8.8 9.9 1.1 2.2
8.8 9.9 1.1 2.2 3.3
I want to read these values and stored as two matrix
A= [1.1 2.2 3.3 4.4 5.5
2.2 3.3 4.4 5.5 6.6
3.3 4.4 5.5 6.6 7.7]
and
B= [6.6 7.7 8.8 9.9 9.9
7.7 8.8 9.9 1.1 2.2
8.8 9.9 1.1 2.2 3.3]
Can any one give idea to implement this in matlab? Thanks in advance.....
  2 Comments
Berbia
Berbia on 10 Jan 2013
Two empty lines between each matrix and all matrices have same number of columns but number of rows vary.

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Accepted Answer

per isakson
per isakson on 10 Jan 2013
Edited: per isakson on 10 Jan 2013
See TEXTSCAN Reading After a specified term(or a row) and writing matrix. That includes the solution (including code) to a similar problem.
The basic approach is
  1. read the complete file and store each row as one string
  2. find the positions of the empty rows and calculate the size of the blocks
  3. read the file a second time with the proper format specifier
fid = fopen(...)
loop over all blocks
fgetl( ) % read the empty lines
cac = textscan( format, block_size, ... );
end
Do not worry about the time it takes to read the file a second time. If it is not huge it is red from the cache the second time.

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