How to read '.m' files which is already saved in matlab

I am just find the year by year nanmaean and saved that script by creating a new folder.Now i want to plot polynomial curve fitting using these nanmean values corresponding to the years .But i couldn't read that all seperate scripts together to plot that . For this am just used the following code, only showing the number of files. Folder= path upto new folder , File= dir('*.m')

[Poorna]

hi jincy , here is a possible way to read the nanmean values corresponding to the year

i assume that there is a single file in a folder containing values of years and their corresponding values in this way

2020,16

2019,18

2021,19

suppose lets assume the path to the folder for nanmean values file as 'here/is/the/path/filename.m'

suppose the file name is values.m.

path='here/is/the/path/values.m';

filecontent=fileread('here/is/the/path/values.m');

lines=strsplit(filecontent,'\n')

years = [];

values = [];

for i = 1:numel(lines)

lineParts = strsplit(lines{i}, ',');

year = str2double(lineParts{1});

value = str2double(lineParts{2});

% Append the year and value to the arrays

years = [years, year];

values = [values, value];

end

and from this you have the information of years and their corresponding values

[Jincy]

Thank you mam but the nanmean values of each year is not numerically represented.Only find an Indian region using this nanmean..so how could plot a polynomial curve fitting with these nanmean values

[Stephen23]

"How to read '.m' files which is already saved in matlab"

Note that:

• .M files store code, and can be run (scripts) or called/evaluated (functions).
• .MAT file store data, and the data can be imported.

Are you really storing data in .M files? Or are they scripts for running? Your question does not make this clear.

[Jincy]

I am just save the scripts of 21 years seperately in a new folder to find the nanmean of indian using shapefile

Answer 1

[Diwakar Diwakar]

If you will provide the .m file then we can able to give you the propoer answer with code. meanwile try the below code. may be it will help you.

% Step 1: Create a folder to store the '.m' files

% Step 2: Save each script as a separate '.m' file in the folder

% Step 3: Read the '.m' files
folder = 'path_to_folder'; % Replace 'path_to_folder' with the actual path to your folder
files = dir(fullfile(folder, '*.m'));

% Step 4: Loop through each file and calculate the nanmean values
nanmeans = [];
for i = 1:length(files)
    file = fullfile(folder, files(i).name);
    run(file); % Execute the script
    nanmeans = [nanmeans, nanmean]; % Store the nanmean value
end

% Step 5: Plot the polynomial curve fitting
years = 1:length(nanmeans); % Assuming each script corresponds to one year
degree = 2; % Set the degree of the polynomial curve fitting

coefficients = polyfit(years, nanmeans, degree);
curve = polyval(coefficients, years);

plot(years, nanmeans, 'o', years, curve);
xlabel('Year');
ylabel('nanmean');
title('Polynomial Curve Fitting');
legend('Data Points', 'Curve Fitting');

[Jincy]

It showing this error

[Stephen23]

Do not use the variable name NANMEAN, because this shadows the inbuilt function of the same name.

Answer 2

[Sarthak]

Hello Jincy,

What I understand from your question is that you want to plot the data from separate MATLAB files on a single plot. For that, you can add the required MATLAB files to the MATLAB Search Path and then use them to plot the curve. You can add a folder containing the files to the MATLAB path by:

1. Right click on the folder.
2. Click on ‘Add to Path’.

You can also use the ‘addpath’ function in MATLAB to add your files/folders to the MATLAB search path, the link of whose documentation is attached below:

Add folders to search path - MATLAB addpath - MathWorks India

Once you add the files to the path, you can simply load the files where you want to plot them by using load(‘fileName.m’).

Hope this helps!!

[Jincy]

Path is correctly displayed..but i couldn't read all the .m files