why am I getting this error ? Any help please

for i = 1:length(file_list)

filename = file_list(i);

data_in = readtable([path_n filename]);

Error using readtable

"filename" must be a string scalar or

character vector.

Error in READ_MULTI_FILES (line 10)

data_in = readtable([path_n filename]);

Answer 1

[Stephen Tete]

files = dir('*.Cmn');

for i = 1:length(files)

data1 = files(i).name;

f = fopen(data1);

data = textscan(f,'%f%f%f%f%f%f%f%f%f%f', 'headerlines',5,'Delimiter','');

fclose(f);

% GET DATE

MJ{i} = data{1};

MJ = {cat(1,MJ{:})};

MJ_date = MJ{1,1};

end

Answer 2

[Walter Roberson]

    filename = file_list{i};
    data_in = readtable( fullfile(path_n, filename) );

[Stephen Tete]

I'm reading a '.Cmn' file and it now 'readtable' is not able to read the file.

for i = 1:length(file_list)

filename = file_list{i};

data_in = readtable(fullfile(path_n, filename));

Error using readtable

'.Cmn' is not a recognized file

extension. Unable to detect file type. To

read the file as a specific file type,

regardless of file extension, use the

'FileType' name-value pair.

Error in READ_MULTI_FILES (line 12)

data_in = readtable(fullfile(path_n,

filename));

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/598348-matlab-function-to-read-data-files-having-cmn-extension

[Stephen Tete]

Thank you for your continuous help @Walter Roberson

Im able to read single files of this extension nevertheless, the issue at hand is to be able to read more than one of these files at once in and plot.

i settled with this code which allows me to do that (see below) but having to read the content has been a challenge.

[file_list,path_n]=uigetfile('*.Cmn','Grab the files you want yo process','Multiselect', 'on');
if iscell(file_list) == 0
    file_list =(file_list);
end
for i = 1:length(file_list)
    filename = file_list{i};
    data_in = readtable(fullfile(path_n, filename));
    subject_id = filename(1:end-4);
    VTEC = data(:,9);
    STEC = data(:,8);
    time = hours(:,2);
    [H,M,S] = hms(time);
    scatter(H,VTEC, 'k', H,STEC,'o');
end

[Walter Roberson]

[file_list, path_n] = uigetfile('*.Cmn','Grab the files you want yo process','Multiselect', 'on');

if isnumeric(file_list)
    return;  %user cancel
end
file_list = cellstr(file_list);

for i = 1:length(file_list)
    filename = file_list{i};
    data_in = readtable(fullfile(path_n, filename));
    subject_id(1,i) = string(filename(1:end-4));
    VTEC = data(:,9);
    STEC = data(:,8);
    time = hours(:,2);
    [H,M,S] = hms(time);
    scatter(H,VTEC, 'k', H,STEC,'o');
    hold on
end
leg = reshape(subject_id + ["_V"; "_S"], 1, []);
legend(leg)

[Stephen Tete]

Thank you so much for the help.

i modified the previous suggestion (you gave in the link above) and this modification works perfectly for me

files = dir('*.Cmn');
for i = 1:length(files)
    data1 = files(i).name;
    f = fopen(data1);
    data = textscan(f,'%f%f%f%f%f%f%f%f%f%f', 'headerlines',5,'Delimiter','');
    fclose(f);
    % GET DATE
    MJ{i} = data{1};
    MJ = {cat(1,MJ{:})};
    MJ_date = MJ{1,1};
end