MATLAB: How to convert the .txt file into .mat file

text;

Best Answer

fid = fopen('YourInputFile.txt', 'rt');
header_line = fgetl(fid);
var_names = matlab.lang.makeValidName( regexprep(regexp(S,'[;,]','split'), '"', '') );
line_fmt = repmat('%g', 1, length(var_names));
datacell = textscan(fid, line_fmt, 'CollectOutput', 1, 'Delimiter', ',');
fclose(fid);
your_data = array2table( datacell{1}, 'VariableNames', var_names);
save('YourOutputFile.mat', 'header_line', 'your_data');

The column names used in the table would end up being

NumberOfTimesPregnant, PlasmaGlucoseConcentration, DiastolicBloodPressure, TricepsSkinFoldThickness, x2_HourSerumInsulin, BodyMassIndex, DiabetesPedigreeFunction, Age, ClassVariable

These are somewhat natural except for the x2_HourSerumInsulin, which is the result of automatically processing "2-Hour serum insulin" (double-quotes included) to create a valid MATLAB variable name, as column names for table() objects must be valid variable names.

If you have preferred variable names for the columns, you can replace the assignment to var_names with your preferred names; this code is generalized to build valid names from a header line with comma or semi-colon separator, under the assumption that the data is numeric. (The code will, however, fail if there are duplicate column headers.)

Related Solutions

MATLAB: How to make each pair of pixels from the matrix in a row major order

Hello Subroto. I have used a couple of steps to convert A into a vector of paired up pixels and stored it in A_paired.

>> A=[43   36   31   35   35   29   29   25
      33   33   32   29   25   25   22   22
      33   33   31   32   31   27   25   29
      28   33   35   27   25   29   32   51
      23   26   30   38   31   43   47   57
      27   29   30   37   40   52   63   61
      23   24   32   42   52   62   72   66
      24   30   44   54   65   71   70   74 ];
>> A_transpose = A';
>> A_vector = A_transpose(:);
>> A_paired = reshape(A_vector, 2, length(A_vector) / 2)'
A_paired =
    43    36
    31    35
    35    29
    29    25
    33    33
    32    29
    25    25
    22    22
    33    33
    31    32
    31    27
    25    29
    28    33
    35    27
    25    29
    32    51
    23    26
    30    38
    31    43
    47    57
    27    29
    30    37
    40    52
    63    61
    23    24
    32    42
    52    62
    72    66
    24    30
    44    54
    65    71
    70    74

I hope this was helpful. :)

MATLAB: How to read only some lines and skip others

>> cssm('cssm.txt')
ans =
         0  -69.1127  -68.9000  -65.2096
    0.0270  -69.1062  -68.8937  -65.2083
    0.0540  -69.0996  -68.8874  -65.2069
    0.0810  -69.0931  -68.8811  -65.2056

where

function  out = cssm( filespec )
    fid = fopen( filespec );
    cac = textscan( fid, '%f%f%f%f%*[^\n]', 4, 'Delimiter',',' ...
                ,   'CollectOutput',true, 'Headerlines',1 );
    [~] = fclose( fid );
    out = cac{:};
end

and cssm.txt contains your data

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Related Solutions

MATLAB: How to make each pair of pixels from the matrix in a row major order

MATLAB: How to read only some lines and skip others

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