CODEWITHSUNDEEP
matlabscanf
mabalenk
mabalenk

Reputation: 1043

How to read a vector of data from text file with MATLAB?

I'm trying to accomplish a relatively simple task of reading an ASCII data file into MATLAB. The file structure is given below:

(0,180)
[ 0 0.0174533 0.0349066 0.0523599 0.0698132 ... ]

While I'm able to read in the first line with fscanf I fail to read in the vector of float values with an '%f':

A = fscanf(fid, '(%d,%d)\n[ %f ]').

I have figured out a solution to my problem. Two calls to textscan must be used instead of a single call to fscanf. More elegant solution is always welcome.

function [range, theta] = readTheta(fname)

  fid = fopen(fname, 'r');

  line1 = fgetl(fid);

  C = textscan(line1, '(%d,%d)\n');

  range = [ C{1}, C{2} ];

  line2 = fgetl(fid);

  line2 = regexprep(line2, {'[ ' ' ]'}, '');

  C = textscan(line2, '%f');

  theta = C{1};

  fclose(fid);

end

Upvotes: 0

Views: 301

Answers (1)

Pursuit
Pursuit

Reputation: 12345

You can push textscan a lot harder than this. For example, consider the following parameters settings to textscan.

data = textscan(anyLine,'%f','delimiter','[]() ,','MultipleDelimsAsOne',true);

Now this command will work for either of the lines above.

anyLine= '(0,7)';
data = textscan(anyLine,'%f','delimiter','[]() ,','MultipleDelimsAsOne',true); 
disp(data{1});

anyLine= '[ 0 0.0174533 0.0349066 0.0523599 0.0698132 ]';
data = textscan(anyLine,'%f','delimiter','[]() ,','MultipleDelimsAsOne',true); 
disp(data{1});

Upvotes: 2

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