how can i read ascii files into matlab?

Hi,

I have recently started working with Matlab. I have several ascii files with different width. How can I automatically read all ascii files into Matlab? can someone help me?

below you can see my matlab code.

Thank you :)

opts = delimitedTextImportOptions("NumVariables", 73);

% Specify range and delimiter
opts.DataLines = [19, Inf];
opts.Delimiter = "\t";
% Specify column names and types
opts.VariableNames = ["Settings", "VarName2", "VarName3", "VarName4", "VarName5", "VarName6", "VarName7", "VarName8", "VarName9", "VarName10", "VarName11", "VarName12", "VarName13", "VarName14", "VarName15", "VarName16", "VarName17", "VarName18", "VarName19", "VarName20", "VarName21", "VarName22", "VarName23", "VarName24", "VarName25", "VarName26", "VarName27", "VarName28", "VarName29", "VarName30", "VarName31", "VarName32", "VarName33", "VarName34", "VarName35", "VarName36", "VarName37", "VarName38", "VarName39", "VarName40", "VarName41", "VarName42", "VarName43", "VarName44", "VarName45", "VarName46", "VarName47", "VarName48", "VarName49", "VarName50", "VarName51", "VarName52", "VarName53", "VarName54", "VarName55", "VarName56", "VarName57", "VarName58", "VarName59", "VarName60", "VarName61", "VarName62", "VarName63", "VarName64", "VarName65", "VarName66", "VarName67", "VarName68", "VarName69", "VarName70", "VarName71", "VarName72", "VarName73"];
opts.VariableTypes = ["double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double", "double"];
opts = setvaropts(opts, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73], "TrimNonNumeric", true);
opts = setvaropts(opts, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73], "DecimalSeparator", ",");
opts = setvaropts(opts, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73], "ThousandsSeparator", ".");
opts.ExtraColumnsRule = "ignore";
opts.EmptyLineRule = "read";

% Pfad auswählen

d=uigetdir('','Auswahl Datenordner');
cd(d);
pr=dir('*.asc');
names={pr.name};

s= size(names);

% Dateien einlesen und als struct speichern

for i=1:1:s(2)
    
 Varnames{i} = matlab.lang.makeValidName(strcat('T_profile_',num2str(i)));   
 temp_T =readtable(names{i}, opts);
 temp_T = table2array(temp_T);
 T_Scheibe.(Varnames{i}) = temp_T;
 
end

[VBBV]

Use textscan function

[Farzaneh Sh]

Thanks for advice!

[Mathieu NOE]

hello

i still like to use this function for simple txt / ascii files - it's fast and easy to use

function  [outdata,head] = readclm(filename,nclm,skip,formt)

% READCLM Reads numerical data from a text file into a matrix.
%	Text file can begin with a header or comment block.
%	[DATA,HEAD] = READCLM(FILENAME,NCLM,SKIP,FORMAT)
%	Opens file FILENAME, skips first several lines specified
%	by SKIP number or beginning with comment '%'.
%	Then reads next several lines into a string matrix HEAD
%	until the first line with numerical data is encountered
%	(that is until first non-empty output of SSCANF).
%	Then reads the rest of the file into a numerical matrix
%	DATA in a format FORMAT with number of columns equal
%	to number of columns of the text file or specified by
%	number NCLM. If data does not match the size of the
%	matrix DATA, it is padded with NaN at the end.
%
%	READCLM(FILENAME) reads data from a text file FILENAME,
%	skipping only commented lines. It determines number of
%	columns by the length of the first data line and uses
%	the floating point format '%g';
%
%	READCLM uses FGETS to read the first lines and 	FSCANF
%	for reading data.

%  Kirill K. Pankratov,  [e-mail]
%  03/12/94, 01/10/95.

 % Defaults and  parameters ..............................
formt_dflt = '%g';  % Default format for fscanf
addn = nan;         % Number to fill the end if necessary

 % Handle input ..........................................
if nargin<1, error('  File name is undefined'); end
if nargin<4, formt = formt_dflt; end
if nargin<3, skip = 0; end
if nargin<2, nclm = 0; end
if isempty(nclm), nclm = 0; end
if isempty(skip), skip = 0; end

 % Open file ............................
[fid,msg] = fopen(filename);
if fid<0, disp(msg), return, end

 % Find header and first  data line ......................
is_head = 1;
jl = 0;
head = ' ';
while is_head  % Add lines to header.....
  s = fgets(fid);           % Get next line
  jl = jl+1;
  is_skip = jl<=skip;
  is_skip = jl<=skip | s(1)=='%';
  out1 = sscanf(s,formt);   % Try to read this line
   % If unreadable by SSCANF or skip, add to header
  is_head = isempty(out1) | is_skip;
  if is_head & ~is_skip
    head = str2mat(head,s(1:length(s)-1)); end
end
head = head(2:size(head,1),:);

 % Determine number of columns if not specified
out1 = out1(:)';
l1 = length(out1);
if ~nclm, nclm = l1; end

 % Read the rest of the file ..............................
if l1~=nclm  % First line format is different from ncolumns

  outdata = fscanf(fid,formt);
  lout = length(outdata)+l1;
  ncu = ceil(lout/nclm);
  lz = nclm*ncu-lout;
  outdata = [out1'; outdata(:); ones(lz,1)*addn];
  outdata = reshape(outdata,nclm,ncu)';

else              % Regular case

  outdata = fscanf(fid,formt,[nclm inf]);
  outdata = [out1; outdata'];  % Add the first line

end

fclose (fid);     % Close file ..........