convert strings of multiple numbers into matrices

Hello,

I am trying to convert the output log of a software into a ready-to-use matrix.

The output of the software is a txt file that contains a serie of strings like this one:

[[-0.4888 -0.4661 -0.7374 54.5679]

[-0.4835 0.8483 -0.2157 25.8953]

[ 0.7262 0.2511 -0.64 58.3138]

[ 0. 0. 0. 1. ]]

I am trying to read in these strings and extract the numbers in order to obtain the following format AKA a normal matlab matrix double precison :

[-0.4888 -0.4661 -0.7374 54.5679;

-0.4835 0.8483 -0.2157 25.8953;

0.7262 0.2511 -0.64 58.3138;

0 0 0 1 ];

I have been able to read in the txt file but I do not understand how to extract all numbers and put it in a normal matrix.

Thanks for your help!

Giacomo

[KSSV]

How are you reading the txt file?

[Giacomo Bertazzoli]

with the function "readlines"

Answer 1

[Jan]

% Contents of the text file:
% [[-0.4888 -0.4661 -0.7374 54.5679]
%  [-0.4835  0.8483 -0.2157 25.8953]
%  [ 0.7262  0.2511 -0.64   58.3138]
%  [ 0.      0.      0.      1.    ]]

% Code:
C = fileread(FileName);
C(C == '[' || C == ']') = [];   % Remove [ and ]
D = sscanf(C, '%g', [4, 4]);    % [EDITED]

[Giacomo Bertazzoli]

Thanks for the answer! It gives me an error when running sscanf "too many inputs arguments"

D = sscanf(C, '%g', 4, 4);
Error using sscanf
Too many input arguments.
 

what can it be? The "C" variuabile is a 4x32 char

[Jan]

@Giacomo Bertazzoli: This was a typo. You can examine such problems by reading the documentation:

doc sscanf

"Too many input arguments" mean, that sscanf accepts less then 4. So check, what the 3rd argument must be: The size of the imported data. I've written "4,4", but it must be "[4, 4]". See my edited code.

[Giacomo Bertazzoli]

Just solved it the same way. Thank you very much! accepting your answer now