Plotting graph from.txt files and splitting their names

Hello,

How can I read multiple files named like these (attached), separate them by names and plot one graph?

I've tried using this code below, however my graph appears blank but with any error message. I tried to fix it in different ways but I couldnt. Can someone give me a hand on it?

dir_files = 'Bending';

F = dir(fullfile(dir_files,'*.txt'));

colormatrix = [0.61,0.61,0.68; 0,1,1; 0,0,1];

mmatrix = ['o'; '*'; '+';'.'];

for ii = 1:numel(F)

newStr = split(F(ii).name,'-')

switch newStr(1)

case 'X'

color1 = colormatrix(1,:);

case 'N'

color1 = colormatrix(2,:);

end

hold on

switch newStr(3)

case 'before'

m1 = mmatrix(1,:);

case 'during'

m1 = mmatrix(3,:);

end

hold on

F(ii).Data = readtable(fullfile(F(ii).folder,F(ii).name),'DecimalSeparator',',');

plot(F(ii).Data.T,F(ii).Data.Vf, Marker=mmatrix, MarkerSize=12, Color=color1, DisplayName=F(ii).name)

end

legend({F.name},'Location','eastoutside')

set(legend, 'FontSize',12);

xlabel('Time, t [s]');

ylabel('Potential, E [V]');

title('OCP monitoring');

colormap(colormatrix);

c = colorbar('southoutside', 'Ticks' ,[0.17,0.50,0.85], ...

'TickLabels',{'0.5' , '16' , '22'});

c.Label.String = 'Immersion time (h)';

set(c, 'FontSize',10);

Answer 1

[Voss]

dir_files = '.';
F = dir(fullfile(dir_files,'*.txt'));
colormatrix = [0.61,0.61,0.68; 0,1,1; 0,0,1];
mmatrix = ['o'; '*'; '+';'.'];
for ii = 1:numel(F)
    
    newStr = split(F(ii).name,'-')
    switch newStr{1} % <- modified
        case 'X'
            color1 = colormatrix(1,:);
            
        case 'N'
            color1 = colormatrix(2,:);
        
    end
    hold on
    switch newStr{3} % <- modified
        case 'before.txt' % <- modified
            m1 = mmatrix(1,:);
        case 'during.txt' % <- modified
            m1 = mmatrix(3,:);
    end
    hold on
    F(ii).Data = readtable(fullfile(F(ii).folder,F(ii).name),'DecimalSeparator',',');
    plot(F(ii).Data.T,F(ii).Data.Vf, Marker=m1, MarkerSize=12, Color=color1, DisplayName=F(ii).name)
    %                                       ^^ modified
end

newStr = 3x1 cell array
    {'N'         }
    {'4A'        }
    {'before.txt'}

newStr = 3x1 cell array
    {'X'         }
    {'4A'        }
    {'during.txt'}

 
legend({F.name},'Location','eastoutside')
set(legend, 'FontSize',12);
xlabel('Time, t [s]'); 
ylabel('Potential, E [V]'); 
title('OCP monitoring');
colormap(colormatrix);
c = colorbar('southoutside', 'Ticks' ,[0.17,0.50,0.85], ... 
        'TickLabels',{'0.5' , '16' , '22'});
c.Label.String = 'Immersion time (h)';
set(c, 'FontSize',10);