Some binary data recoreded by labview cannot open by other program

Question

I have got some binary data which is recorded by a labview program. When I use some other program to open it (e.g. matlab, notepad, MS excel), it become some strange character, but when I use another labview retrieval program to open it, there is no problem. What happen?
The original data is 32 bit data sets which are separated by a <CRLF>.
The recording program (HS-Acquis.llb), the retrieval program (Advanced Viewer.llb), original data file (C1010710.480245) and the data file after retrieval (C1010710.480245.txt) was attached
phy_mechanic
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Answer 1

The data seems like it can only be read by LabVIEW because LabVIEW is set up to properly read the binary data and it is simple for a user to do.
For matlab to read the data, it will have to be properly configured.
FOPEN     -     Open a file
FREAD     -     Binary file read
FWRITE   -     Binary file write
FTELL      -     Return the current file position
FSEEK     -     Set file position indicator
FCLOSE   -     Close a file
An example is given from http://www.mathworks.com/support/tech-notes/1400/1​403.htm:
%This m-file is a short example of how to read and write a binary file
%in MATLAB using low level routines
%write file
fid = fopen('square_mat.bin','wb') %open file in binary write mode
fwrite(fid, 'This is a square matrix', 'char'); %insert a header
fwrite(fid, [1 2 3; 4 5 6; 7 8 9]', 'int32'); %write data to file
fclose(fid); %close file
%read in the same file
fid = fopen('square_mat.bin','rb') %open file
bintitle = fread(fid, 23, 'char'); %read in the header
title = char(bintitle')
data = fread(fid, [3 inf], 'int32') %read in the data
data_tranpose = data' %must transpose data after reading in
fclose(fid) %close file
 As you can see, the data type, size, array size, etc. has to be explicitly defined. In addition, as Dennis alluded to, LabVIEW stores binary data in Big-Endian format, wheras most windows applications use little endian. I assume matlab is one of those applications...but I am not a huge matlab developer. Google may have more information on that. You can use a typecast in matlab to convert big to little and little to big, however, so that may be a great place to start. Please see http://www.mathworks.com/access/helpdesk/help/tech​doc/ref/typecast.html
Of course, our wonderful applications engineers at National Instruments have already done the above work for you and developed Knowledgebase 11SF83W0: How do I Transfer Data Between The MathWorks, Inc. MATLAB® Software Developm...which is easily searchable from ni.com knowledgebase category using 'matlab binary'
Rob K
Measurements Mechanical Engineer (C-Series, USB X-Series)
National Instruments
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