read data line by line from a .dat file after pressing a certain keyboard key

Hello, i'm new to Matlab and need to create a function which read data line by line from a .dat file after pressing a certain keyboard key and then save them to multiple outputs, the same idea as scanf in C or textread in Matlab ([A,B,C,...] = textread(filename,format))

my data looks like:

• 7 1099 236 260 236 260 0
• 2 1078 236 300 236 300 0
• 3 1829 236 100 236 100 0
• 4 1367 206 500 206 500 0
• 1 1123 246 170 246 170 0

Answer 1

[Gareth Thomas]

Are you looking for fgetl? Read line from file, removing newline characters

[Mohamed Ali]

Hi, I'm aware of this function but i need to get each value from the line on its own and save it to a different variable.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

[Mohamed Ali]

If there's an alternative than eval to pass each line value to a function to work on it later!

[Walter Roberson]

textlines = regexp( fileread(filename), '\r?\n', 'split');
if isempty(textlines{end}); textlines{end} = []; end   %file might or might not have ended in newline

YourResults = cellfun(@(onetextline) YourTextFunction(onetextline), lines, 'Uniform', 0);

Or, better:

num_cols = 7;
fmt = repmat('%f', 1, num_cols);
fid = fopen(filename, 'r');
YourInputCell = textscan(fid, fmt, 'CollectOutput', 1);
fclose(fid);
YourInputNumeric = YourInputCell{1};

YourResults = arrayfun(@(RowIdx) YourNumericFunction( YourInputNumeric(RowIdx,:) ), (1:size(YourInputNumeric,1)).', 'Uniform', 0 );