How can I solve the eror " Error using textscan Invalid file identifier. Use fopen to generate a valid file identifier. " for this code ?

function [load_time_stamp, load_value]=get_the_actual_demand_data()

filename = 'dee1.csv'; delimiter = ','; startRow = 2;

formatSpec = '%s%*s%[^\n\r]'; fileID = fopen(filename,'r');

dataArray = textscan(fileID, formatSpec, 'Delimiter', delimiter, 'HeaderLines' ,startRow-1);

%dataArray = textscan(fileID, formatSpec, 'Delimiter', delimiter, 'TextType', 'string', 'EmptyValue', NaN, 'HeaderLines' ,startRow-1, 'ReturnOnError', false, 'EndOfLine', '\r\n');

load_time_stamp = dataArray{:, 1};

fclose(fileID);

formatSpec = '%*s%f%[^\n\r]'; fileID = fopen(filename,'r');

dataArray = textscan(fileID, formatSpec, 'Delimiter', delimiter, 'HeaderLines' ,startRow-1);

%dataArray = textscan(fileID, formatSpec, 'Delimiter', delimiter, 'TextType', 'string', 'EmptyValue', NaN, 'HeaderLines' ,startRow-1, 'ReturnOnError', false, 'EndOfLine', '\r\n');

load_value = dataArray{:, 1};

fclose(fileID);

end

[Rik]

Apparently Matlab can't open 'dee1.csv' for reading. This usually means that the file doesn't exist in the current folder, or that the file is locked so it can only be read by an administrator process. It is usually best to create a full path instead of a relative path: try fileID=fopen('C:\your_folder\dee1.csv');

[javad amoli]

thank you. it works .

[Ritesh Chandra Tewari]

Thank you!

[Clément Carré]

thank you