CODEWITHSUNDEEP
matlabfile
puja
puja

Reputation: 47

Reading a text file in MATLAB?

I have a text file which has the contents as follows.. I need to read this file column wise (ies, 2 columns here). I have tried many ways.. but cannot do as it contains "(" , "," , ")" etc... please guide..

(-2.714141687294326, 0.17700122506478025)
(-2.8889905690592976, 0.1449494260855578)
(-2.74534285564141, 0.3182989792519164)
(-2.728716536554531, -0.3267545129349194)
(-2.280859632844493, -0.7413304490629143)
(-2.8205377507406095, 0.08946138452856946)
(-2.6261449731466335, -0.16338495969832847)
(-2.8863827317805537, 0.5783117541867042)
(-2.6727557978209546, 0.11377424587411682)
(-2.5069470906518565, -0.6450688986485736)
(-2.6127552309087236, -0.01472993916137419)
(-2.7861092661880185, 0.23511200020171835)
(-3.2238037438656533, 0.5113945870063824)
(-2.6447503899420304, -1.1787646364375748)

Upvotes: 0

Views: 160

Answers (2)

Luis Mendo
Luis Mendo

Reputation: 112759

Try this:

x = importdata('filename.txt');
x = regexp(x,'-?\d+\.?\d*','match'); %// detect numbers as [-]a[.][bcd]
x = cellfun(@str2num, vertcat(x{:}));

If the file can contain numbers in decimal form ("1.234") and in scientific notation ("1.234e-56"):

x = importdata('filename.txt');
x = regexp(x,'-?\d+\.?\d*(e-?\d+)?','match');
x = cellfun(@str2num, vertcat(x{:}));

Upvotes: 1

hbaderts
hbaderts

Reputation: 14336

You can use fscanf and specify the desired format:

fid = fopen('filename.txt');
x = fscanf(fid,'(%f, %f)\n',[2,inf]).';
fclose(fid);

The format spec '(%f, %f)\n' reads to float values inside brackets, separated by , per line. With [2,inf] you specify to put it into a 2 x n array, where n is as large as needed. To have the same format as before, you'll have to transpose it again .'.

Upvotes: 1

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