How can i call function without any output arguments?
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On my project my code is working. After that i tried to add a funciton on my code. As you can see down below i put my codes in a funciton & called it "plotter" without any output arguments.
function plotter(files, dir_path)
Exceldir = dir_path + "\ExcelFiles";
cd(Exceldir); % Change current directory to the where excel files restored in.
for i=1:length(files)
% Get sheet names being in the excel file.
sheets = sheetnames(files(i).name); % Sheets array.
% Get whole datas inside the excel files month by month.
for j=1:length(sheets)
data = readtable(files(i).name, "Sheet", sheets(j));
days = 1:1:size(data.Date); % Days array.
hold on;
plot(data.number_sold, days, "b.", "LineWidth", 2) % xAxis = sold_number
% yAxis = days
end
end
hold off;
end
% Call function "plotter"
xlsx_files = dir("*.xlsx");
Maindir = "C:\Users\emird\AppData\Local\Programs\df_2_db";
plotter(xlsx_files, Maindir)
When i call my funciton i get an error.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1308885/image.png)
How can solve this problem and run my code?
7 Kommentare
Stephen23
am 27 Feb. 2023
Bearbeitet: Stephen23
am 27 Feb. 2023
"When i run my code it changes current directory to where the excel files stored in(gets in the ExcelFiles directory)."
Which is one of the reasons why it is a bad idea to change directory just to access data files: your code changes the function scope.... and then functions don't work, because you have changed the function scope. Best avoided.
The recommended approach is to use absolute/relative filenames to access data files. All MATLAB functions that access data files accept absolute/relative filenames. You should use absolute/relative filenames. You will find FULLFILE useful for this.
Antworten (1)
Cris LaPierre
am 27 Feb. 2023
Bearbeitet: Cris LaPierre
am 27 Feb. 2023
Based on the code you have shared, you likely need to change the order of your script. Functions must be defined at the bottom of the script.
% Call function "plotter"
xlsx_files = dir("*.xlsx");
Maindir = "C:\Users\emird\AppData\Local\Programs\df_2_db";
plotter(xlsx_files, Maindir)
function plotter(files, dir_path)
Exceldir = dir_path + "\ExcelFiles";
cd(Exceldir); % Change current directory to the where excel files restored in.
for i=1:length(files)
% Get sheet names being in the excel file.
sheets = sheetnames(files(i).name); % Sheets array.
% Get whole datas inside the excel files month by month.
for j=1:length(sheets)
data = readtable(files(i).name, "Sheet", sheets(j));
days = 1:1:size(data.Date); % Days array.
hold on;
plot(data.number_sold, days, "b.", "LineWidth", 2) % xAxis = sold_number
% yAxis = days
end
end
hold off;
end
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