read binary file into a 2d array matlab

Question

I use this code fragment to read a binary file into a array

 fid=fopen('data.bin','rb') % opens the file for reading
 A = fread(fid, count, 'int16') % reads _count_ elements and stores them in A

But it reads the file into a 1 dimensional array. Is there a direct method to read a binary file into a 2d array without me having to write loops to do that ?

vharavy · Accepted Answer · 2011-11-08 16:44:28Z

3

I believe this is what you need:

fid = fopen('data.bin','rb');
A = fread(fid, [rows columns], 'int16')

answered Nov 8, 2011 at 16:44

vharavy

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Amro · Accepted Answer · 2011-11-08 16:16:42Z

1

You must know beforehand the number of rows/columns of the matrix you want to read. This way you read the values as an array, then reshape the result into the expected size:

A = reshape(A,[r c]);

answered Nov 8, 2011 at 16:16

Amro

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2 Comments

user574183 Over a year ago

my 1 D array length is 11139. How can i make use of reshape function. when i try to do B = reshape(A,100,111) i get a error Error using ==> reshape To RESHAPE the number of elements must not change. I cant even do a reshape(A,100,111.39) nor a reshape(A,100,112).

Smash Over a year ago

the problem is, as Amro said, that you need to know the expected rows/colums... if you're expecting 11100 elements, and you are reading more, then the problem comes from the way you read the file

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