plotting multiple figures with auto naming

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Mohammed Alhamdan 2022-12-25

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https://ww2.mathworks.cn/matlabcentral/answers/1884127-plotting-multiple-figures-with-auto-naming

评论： Image Analyst 2022-12-27

I have a folder with multiple txt files that I want to print into separate figures. How can I load, plot, and print each figure with the same file name without naming them manually each time?

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Answer 1

Image Analyst 2022-12-25

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在 MATLAB Online 中打开

Is this what you want to do?

% Get a list of all txt files in the current folder.
fileList = dir('*.txt')
numFiles = numel(fileList)
% Create a figure for each file.
for k = 1 : numFiles
    % Build the string you want to display in the titlebar of the figure.
    thisFileName = sprintf('File #%d of %d = %s', k, numFiles, fileList(k).name)
    % Create a figure and make the title bar have that string.
    hFig(k) = figure('Name', thisFileName, 'NumberTitle','off');
    % Now do stuff with thisFileName, like plot it or whatever
end

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Image Analyst 2022-12-26

编辑：Image Analyst 2022-12-26

在 MATLAB Online 中打开

I think this should work:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;
% Get a list of all txt files in the current folder.
fileList = dir('*.txt')
numFiles = numel(fileList)
% Create a figure for each file.
for k = 1 : numFiles
    % Build the string you want to display in the titlebar of the figure.
    thisFileName = sprintf('File #%d of %d = %s', k, numFiles, fileList(k).name)
    % Create a figure and make the title bar have that string.
    hFig(k) = figure('Name', thisFileName, 'NumberTitle','off');
    % Now do stuff with thisFileName, like plot it or whatever
    A = load(thisFileName) % A is a structure here.
    % Extract from structure into vectors.
    t = A.x;
    y1 = A.y;
    y2 = A.z;
    figure;
    plot (t, y1, 'LineWidth',1, 'Color', [0 0.4470 0.7410])
    hold on
    plot (t, y2, 'LineWidth',1, 'Color', [0.6350 0.0780 0.1840])
    caption = sprintf('Data from %s', thisFileName);
    title(caption)
    xlabel('Time')
    ylabel('Delta (units)')
    [folder, baseFileNameNoExt, ext] = fileparts(thisFileName);
    outputFileName = fullfile(folder, [baseFileNameNoExt, '.png']);
    fprintf('Writing %s\n', outputFileName);
    % 	print(gcf,outputFileName,'-dpng','-r600');
    exportgraphics(gcf, outputFileName);
end

Make sure you're extracting the correly named field from the "A" structure or else it won't work.

Mohammed Alhamdan 2022-12-27

编辑：Mohammed Alhamdan 2022-12-27

在 MATLAB Online 中打开

Thank you this helped. I used it to write the following and it worked

clc;    
close all; 
clear; 
workspace; 
format long g;
format compact;
fontSize = 20;
fileList = dir('*0001.txt')
numFiles = numel(fileList)
for k = 1 : numFiles
FileName = sprintf('%s', fileList(k).name)
A = load(FileName);
figure;
title(FileName);
xlabel('Time delay  (ps)')
ylabel('delta T/ T (arb .unit)')
hold on
plot (A(:,1),A(:,2), 'LineWidth',1, 'Color', [0 0.4470 0.7410])
plot (A(:,1),A(:,3), 'LineWidth',1, 'Color', [0.6350 0.0780 0.1840])
print(gcf, fileList(k).name+".png");
end

now my only problem is with [ title(FileName) ]. My files names contain underscores ( _ ) instead of spaces (for example: Data_22-12-23_1534_0001.txt), and this create small letter after each underscore on the title on my figure. is there a solution for it?

screenshot of title on figure: