MATLAB: How to detect a “tab” character in a line of text read by fgetl

detecting special charactersfgetlreading text filesspecial characterstab characterwhitespace

I am using fgetl to read lines in a text file. Is there a way to detect whether one of the whitespace characters is a "tab" ?

Thanks in advance for your help.

Best Answer

l=fgetl(fid);
istab=(l==9);                    % the fast way...
% 
istab=strfind(l,char(9));        % the char() string string functions way

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MATLAB: If the file is not found or the character is not a valid char, the function should return a value -1.

How are you defining a valid character? You can use try,catch.

function [charnum]=char_counter(fname,character)
try fid=fopen(fname,'rt'); 
catch 
    charnum=-1;
    return;
end
if fid<0 || ischar(character)==0
    charnum=-1;
else
str=fileread(fname);
if strncmpi(character,str,inf)==0
    charnum=-1;
end
charnum=count(str,character);
end

MATLAB: Put a space in a text

s=['this is ' num2str(1) ' my cat']

strcat ignores trailing ASCII white space characters and omits all such characters from the output. White space characters in ASCII are space, newline, carriage return, tab, vertical tab, or form-feed characters, all of which return a true response from the MATLAB isspace function. Use the concatenation syntax [s1 s2 s3 ...] to preserve trailing spaces. strcat does not ignore inputs that are cell arrays of strings.

Reference

Best Answer

Related Solutions

MATLAB: If the file is not found or the character is not a valid char, the function should return a value -1.

MATLAB: Put a space in a text

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