How I can count the number lines falling inside the green region

figure(2);
rows = 1;
columns = 1;

for subplotIndex = 1 : rows * columns
    subaxis(rows, columns, subplotIndex, 'spacing', 0.01, 'margin', 0.01);
    m_proj('stereographic', 'lat', 90, 'long', 30, 'radius', 30.1);
    m_coast('patch', [.7 .7 .7], 'edgecolor', 'k');
    m_grid('xtick', -180:90:180, 'tickdir', 'out', 'ytick', [70 80], 'linest', '-');
end

hold on;  
a = 'F:\hysplit_output\ny_alesund\ny_18_19_djf\*.';
files = dir(a);

for jj = 1:numel(files)
    fullFilePath = fullfile(files(jj).folder, files(jj).name);

    if ~files(jj).isdir
        headerLines = 7;
        data = readtable(fullFilePath, 'HeaderLines', headerLines); 
        X = data.Var11;
        Y = data.Var10; 
        [X_map, Y_map] = m_ll2xy(X, Y);
        plot(X_map, Y_map, '-b', 'LineWidth', 0.1);
        hold on;
        
        M = m_shaperead('first_r'); 
        for k = 1:length(M.ncst) 
            m_line(M.ncst{k}(:,1), M.ncst{k}(:,2), 'linewidth', 4, 'color', 'g'); 
           
        end 
        
        [xi, yi] = polyxpoly([X_map, Y_map].', [M.ncst{1}(:, 1), M.ncst{1}(:, 2)].');
        
    end
end

[Catalytic]

Please make life easy for your audience. If you would just prepare a .mat file containing X_map,Y_map (as cell arrays) and M, your code would reduce to just the few lines below. Nothing else in your post matters for what you've asked.

load yourFile X_map Y_map M

for n=1:numel(X_map)
        plot(X_map{n}, Y_map{n}, '-b', 'LineWidth', 0.1);
        hold on;
end

for k = 1:length(M.ncst) 
    
    m_line(M.ncst{k}(:,1), M.ncst{k}(:,2), 'linewidth', 4, 'color', 'g'); 
   
end 

[Ritesh]

@Catalytic I am sorry, but I am beginer

[Image Analyst]

Does your code require the mapping toolbox?

Answer 1

[Matt J]

green=polyshape(vertcat(M.ncst));

Lines=findobj(gca,'Type','line');

clear insideGreen
for i=numel(Lines):-1:1
    
    points=[Lines(i).XData;Lines(i).YData]';
    
    insideGreen(i)= any(isinterior(green,points));
    
end

total=sum(insideGreen)