How can I save data from features files into matrix?

i want to save data from 500 images features files every file contain 6 types of features types such as jcd,tamura,..... .,

the problem is that the data for these 6 features are seperated by comma,i want to make six matrices for these 500 image for type of features ,i atteched this file to help

can any one help

[per isakson]

"the problem is that the data for these 6 features are seperated by comma" Why is that a problem?

[bahaa rabi]

i mean that i want code that save the data for each feature for 500 images .so finally i get 6 matrices the size for each one 500*feature size data .like tamura the size will be 500*18.that i mean.the code will help me to save time to import data for 6 features for 500 images features.with thanks

Answer 1

[per isakson]

I understand that "data for each feature for 500 images" is in ONE text file with 500 blocks of six rows. The format is illustrated by im1.txt which contains two blocks.

Try this

>> S = cssm('im1.txt')
S = 
  1×2 struct array with fields:
    JCD
    Tamura
    ColorLayout
    EdgeHistogram
    AutoColorCorrelogram
    PHOG
>> JCD_matrix = cat( 1, S(:).JCD );
>> whos JCD_matrix
  Name            Size             Bytes  Class     Attributes
  JCD_matrix      2x168             2688  double              

where (in one m-file)

function    im = cssm( ffs )
    %%
    fid = fopen( ffs, 'rt' );
    buf = textscan( fid, '%s', 'Delimiter', '\n' );
    fclose( fid );
    buf = buf{1};
    %%
    len = floor( size(buf,1)/6 );     % number of blocks
    im(1,len) = struct( 'JCD',[], 'Tamura',[], 'ColorLayout',[]                 ...
            ,   'EdgeHistogram',[], 'AutoColorCorrelogram',[], 'PHOG',[] );
    %%
    for jj = 1 : len
        im(jj).JCD                  = read( buf{(jj-1)*6 + 1 }, 'JCD'                 , (jj-1)*6+1 );
        im(jj).Tamura               = read( buf{(jj-1)*6 + 2 }, 'Tamura'              , (jj-1)*6+2 );
        im(jj).ColorLayout          = read( buf{(jj-1)*6 + 3 }, 'ColorLayout'         , (jj-1)*6+3 );
        im(jj).EdgeHistogram        = read( buf{(jj-1)*6 + 4 }, 'EdgeHistogram'       , (jj-1)*6+4 );
        im(jj).AutoColorCorrelogram = read( buf{(jj-1)*6 + 5 }, 'AutoColorCorrelogram', (jj-1)*6+5 );
        im(jj).PHOG                 = read( buf{(jj-1)*6 + 6 }, 'PHOG'                , (jj-1)*6+6 );
    end
end
function    row = read( chr, name, n )
    cac = strsplit( chr, ':' );
    assert( strcmp(cac{1},name),'Row, %d, is "%s". Expected is "%s"', n, cac{1}, name )
    num = textscan( cac{2}, '%f', 'Delimiter',',' );
    row = reshape( num{1}, 1,[] );
end

If execution time is a problem replace

cac = strsplit( chr, ':' );

by

cac = regexp( chr, ':', 'split' );

[bahaa rabi]

i use matlab 2017

.when i tried first code.i got this message

Error: File: Untitled3.m Line: 1 Column: 1

Unexpected MATLAB operator.

[bahaa rabi]

also in matlab 2017 relizes this message

Undefined function or variable 'cssm'.

[per isakson]

I cannot see that "Error: File: Untitled3.m Line: 1 Column: 1" could be caused by my code.

"Undefined function or variable 'cssm'" is because you have not copied and pasted the function I provide in my answer to an m-file, i.e the text that follows after "where (in one m-file)". See function Declare function name, inputs, and outputs

[bahaa rabi]

very thanks i tried again this 2 codes and got results for only one im . what i do call the all 6 features for 500 im. my images strates from im1 to im5 , and i want 6 feature matrix like for matrix for jcd contains the jcd features for 500 images. thank you for your cooperation.

[per isakson]

I wrote: "I understand that "data for each feature for 500 images" is in ONE text file with 500 blocks of six rows. The format is illustrated by im1.txt which contains two blocks."

Why don't you say that I missinterpreted the question?