Convert a .txt file into .mat fiie in MATLAB.

Dear Members I am new to MATLAB.

I have one .txt file containg information in hex format as given below:

1234ABC6789D

AB456C78DEF

......

Like this almost 1000 values are there.

I want to write it in matrix format in matlab.

So can someone please explain how to convert this .txt file into .mat file

Answer 1

[Ameer Hamza]

Try something like this

str = fileread('data.txt');
data = textscan(str, '%x')

data.txt used in my code is attached.

[Dhruv Bhatnagar]

@Ameer Hamza Thanks for your reply. But it is giving string file in one cell. I want in each cell one one value.

Example: If my txt value contain first value as 89CD7632EFAB1054

Output Required:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

8 9 12 13 7 6 3 2 14 15 10 11 1 0 5 4

[Ameer Hamza]

Are you looking for something like this?

str = strsplit(fileread('data.txt'), '\n');
data = cellfun(@(x) textscan(x, '%1x'), str)

[Dhruv Bhatnagar]

Thanks for your quick reply sir

But it is giving error and output is also coming in two cells only like this

1 2

1234ABC6789D AB456C78DEF

I want every bit in each cell such that it would be 2row 16 columns came 2x12 .mat file.

Ex: I want output in this format:

[Ameer Hamza]

But you only have 15 characters in 2nd line. In MATLAB, to create a matrix, all rows must have an equal length.

[Dhruv Bhatnagar]

No no you took me wrong . Sorry its my mistake I didnot paid attention to your input length.

All rows are of equal length from 1 to 16 bit long like this:

89CD7632EFAB1054

64135720B9CE8AFD

059C36AF72EB41D8

79B568A43DF12CE0

9C638D7250AF41BE

16CB34E9528F70AD

B649E31CD02F857A

906FB24D7E815CA3

9A03DE4721B865FC

17536024BDF9CA8E

[Ameer Hamza]

In that case try this

str = fileread('data.txt');
data = textscan(str, '%1x');
data = reshape(data{1}, 16, []).'

Result

>> data
data =
  10×16 uint64 matrix
    8    9   12   13    7    6    3    2   14   15   10   11    1    0    5    4
    6    4    1    3    5    7    2    0   11    9   12   14    8   10   15   13
    0    5    9   12    3    6   10   15    7    2   14   11    4    1   13    8
    7    9   11    5    6    8   10    4    3   13   15    1    2   12   14    0
    9   12    6    3    8   13    7    2    5    0   10   15    4    1   11   14
    1    6   12   11    3    4   14    9    5    2    8   15    7    0   10   13
   11    6    4    9   14    3    1   12   13    0    2   15    8    5    7   10
    9    0    6   15   11    2    4   13    7   14    8    1    5   12   10    3
    9   10    0    3   13   14    4    7    2    1   11    8    6    5   15   12
    1    7    5    3    6    0    2    4   11   13   15    9   12   10    8   14

[Ameer Hamza]

Dhruv Bhatnagar's comment posted as answer moved here:

This error is coming:

Error using textscan

Unable to parse the format character vector at position 1 ==> %1x

Unsupported format specifier '%x'. See the documentation for TEXTSCAN for supported formats.

Error in trial_1 (line 2)

data = textscan(str, '%1x');

[Ameer Hamza]

Which MATLAB release are you using?

[Dhruv Bhatnagar]

I am using R2017b version.

[Ameer Hamza]

Try this code. This should work in R2017b

str = replace(fileread('data.txt'), {newline ' '}, '');
data = reshape(hex2dec(str(:)), 16, []).'

[Dhruv Bhatnagar]

Thank you very much . It works

[Ameer Hamza]

What is the difference?

[Dhruv Bhatnagar]

Actually whatever output I am getting of 1000x16 matrix I want to save it that in one text file.

How to do that.

[Ameer Hamza]

You can directly use writematrix() instead of writing a for-loop.

[Dhruv Bhatnagar]

Thank you soo much it works

[Ameer Hamza]

I am glad to be of help!!!

[Dhruv Bhatnagar]

Thank you sir

[Ameer Hamza]

Dhruv's answer moved here

using writematrix output is saving in below format in text file:

1,5,6,13,15,12,3,2,1,0,11,10,7,8,9

But I want to save the output in text file in this format:

1 5 6 D F C 3 2 1 0 B 10 7 8 9

How can I modify this?

[Ameer Hamza]

You can do it like this

x = [1,5,6,13,15,12,3,2,1,0,11,10,7,8,9];

f = fopen('data.txt', 'w');
fprintf(f, '%x ', x);
fclose(f);

[Dhruv Bhatnagar]

Thank You Sir

[Ameer Hamza]

I am glad to be of help!!!