Plot hatched bars with the hatched legends

The first problem I have 6 bars, I need to make the last three bars (number 5,6,7) hatched for each point on the x axis (such as point 1 , point 2...until point 5). but this code makes the bars number 4,5, and 6 are hatched not the bars number 5,6,7.

The second problem I need to show the hatched in the legend.. this code deos not appear them.

Furthermore, I used here the libraies hatchfill2_r8 and legendflex

This is my code

x = [1,2,3,4,5];

y1=[0.405 0.25 1.14 1.39 0.20 1.09 1.34 ; 0.62 0.47 2.25 2.76 0.42 2.13 2.62;0.88 0.82 3.48 4.24 0.68 3.20 3.92 ;1.26 1.16 4.71 5.72 1.04 4.38 5.34 ;1.71 1.40 5.83 7.09 1.13 5.31 6.50 ];%all

h1 = bar(y1);

% hatchfill parameters

cm = colororder; % or replace with the desired colormap

hfcolor = cm([1 2 3],:); % i'm going to reorder this for convenience

hfstyle = {'cross','cross','cross'};

hfangle = [45 45 45];

% generate hatch fills on the bar objects

hhf = gobjects(6,1);

for k = 1:3

hhf(k) = hatchfill2(h1(k+3),hfstyle{k}, ...

'HatchAngle',hfangle(k), ...

'HatchColor',hfcolor(k,:), ...

'HatchDensity',50); % see note

h1(k+3).FaceColor = 'none';

end

% figure setup

set(gca,'TickLabelInterpreter','latex', 'LineWidth', 1,'FontSize',12, 'YMinorTick','on');

xlabel('$\textbf{Number of tasks}$','FontWeight','bold','FontSize',12,...

'FontName','Palatino Linotype','Interpreter','latex');

ylabel('$\textbf{Total delay [S]}$','FontWeight','bold','FontSize',12,...

'FontName','Palatino Linotype','Interpreter','latex');

ylim([0 9])

% assemble the legend

legendstr = {'\textbf{Kunlun model}', ...

'\textbf{Proposed framework without AES}', ...

'\textbf{Proposed framework with AES-128}', ...

'\textbf{Proposed framework with AES-256}', ...

'\textbf{Delay-energy-aware without AES}', ...

'\textbf{Delay-energy-aware with AES-128}', ...

'\textbf{Delay-energy-aware with AES-256}'};

[~,hlobj] = legendflex(h1,legendstr,'Interpreter','latex', ...

'Anchor',{'nw','nw'}, ...

'Buffer',[10 -10], ...

'FontWeight','bold', ...

'FontSize',9.5, ...

'FontName','Palatino Linotype');

% hatch the legend patches to match the bars

for k = 4:6

hhf(k) = hatchfill2(hlobj(k+6).Children,hfstyle{k-3}, ...

'HatchAngle',hfangle(k-3), ... % use the same parameters as before

'HatchColor',hfcolor(k-3,:), ...

'HatchDensity',20); % but density is different

end

Answer 1

[Mathieu NOE]

hello is this the correct result you expect ?

two simple corrections (wrong indexes)

1/ to get the correct bars hatched :

for k = 1:3        hhf(k) = hatchfill2(h1(k+3),hfstyle{k}, ...

replaced with

for k = 1:3        hhf(k) = hatchfill2(h1(k+4),hfstyle{k}, ...

2/ to correct the legend

for k = 4:6       hhf(k) = hatchfill2(hlobj(k+6).Children,hfstyle{k-3}, ..

replaced with :

for k = 4:6       hhf(k) = hatchfill2(hlobj(k+8).Children,hfstyle{k-3}, ...

full code :

x = [1,2,3,4,5]; 
y1=[0.405 0.25 1.14 1.39 0.20 1.09 1.34 ; 0.62 0.47  2.25 2.76 0.42 2.13 2.62;0.88 0.82  3.48  4.24  0.68 3.20  3.92 ;1.26 1.16 4.71  5.72 1.04 4.38 5.34 ;1.71 1.40 5.83 7.09  1.13 5.31  6.50 ];%all
h1 = bar(y1);  
% hatchfill parameters
cm = colororder; % or replace with the desired colormap
hfcolor = cm([1 2 3],:); % i'm going to reorder this for convenience
hfstyle = {'cross','cross','cross'};
hfangle = [45 45 45];
% generate hatch fills on the bar objects
hhf = gobjects(6,1);
for k = 1:3
    hhf(k) = hatchfill2(h1(k+4),hfstyle{k}, ...
                        'HatchAngle',hfangle(k), ...
                        'HatchColor',hfcolor(k,:), ...
                        'HatchDensity',50); % see note
    h1(k+3).FaceColor = 'none';
end
% figure setup
set(gca,'TickLabelInterpreter','latex', 'LineWidth', 1,'FontSize',12, 'YMinorTick','on');
xlabel('$\textbf{Number of tasks}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylabel('$\textbf{Total delay [S]}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylim([0 9])
% assemble the legend
legendstr = {'\textbf{Kunlun model}', ...
             '\textbf{Proposed framework without AES}', ...
             '\textbf{Proposed framework with AES-128}', ...
             '\textbf{Proposed framework with AES-256}', ...
             '\textbf{Delay-energy-aware without AES}', ...
             '\textbf{Delay-energy-aware with AES-128}', ...
             '\textbf{Delay-energy-aware with AES-256}'};
[~,hlobj] = legendflex(h1,legendstr,'Interpreter','latex', ...
                    'Anchor',{'nw','nw'}, ...
                    'Buffer',[10 -10], ...
                    'FontWeight','bold', ...
                    'FontSize',9.5, ...
                    'FontName','Palatino Linotype'); 
% hatch the legend patches to match the bars 
for k = 4:6
    hhf(k) = hatchfill2(hlobj(k+8).Children,hfstyle{k-3}, ...
                        'HatchAngle',hfangle(k-3), ... % use the same parameters as before
                        'HatchColor',hfcolor(k-3,:), ...
                        'HatchDensity',20); % but density is different
end

[bassant tolba]

Really, thank you so much for your efforts, However, I tried to run your above code, but I still have the same error that I got before about not showing the hatching in the legend unfortunately, can you please help me to solve this

This is error

Check for incorrect argument data type or missing argument in call to function 'getpos'.

Error in legendflex (line 465)

legpospx = getpos(h.leg, 'px');

Error in file (line 33)

[~,hlobj] = legendflex(h1,legendstr,'Interpreter','latex', ...

[bassant tolba]

or if you have specific libraries should i install, please share them with me. Thank you so much really

[Mathieu NOE]

I just ran the code you provided and made the small corrections

I just needed to download the two Fex submissions legendflex and hatchfill2

nothing more , nothing less

do you have more code on your side that could impact , for example h1 object ?

[bassant tolba]

Really, I do not know.. and I tried to modify but I couldn’t. so, please can you kindly share with me the installed files of hatchfil and legend flex please to run them with my code. Thank you so much

[Mathieu NOE]

can you share your code so I can test it on my side ?

attached my code (tested ok again) + functions

all the best

[bassant tolba]

Really, I can not thank you enough for your help. I tried your code on my side and it worked correctly. The last two questions I'm sorry, they may be trivial.

The first question when I change the color of the bars, it does not change in the legend .. so how can i make them change in legend ..

The second question, I need to change the color of the last hatched bar (which is red).. how can I make it also?

and really thank you a million

[Mathieu NOE]

no problem, you can do this way - here I sipmly picked one of the already predefined colormap and uses it for bars and legend

or you can use your own colors , that must be defined as a N x 3 array , in the order you prefer

this is my result here with a HSV colormap . for sake of simplicity the hatch color is by default.

code modified :

NB I don't use any color argumant here when I call legendflex or hatchfill2 - I keep the colors I have used in the bar plot section.

x = [1,2,3,4,5]; 
data=[0.405 0.25 1.14 1.39 0.20 1.09 1.34 ; 0.62 0.47  2.25 2.76 0.42 2.13 2.62;0.88 0.82  3.48  4.24  0.68 3.20  3.92 ;1.26 1.16 4.71  5.72 1.04 4.38 5.34 ;1.71 1.40 5.83 7.09  1.13 5.31  6.50 ];%all

cm = colormap('hsv');
[mmap,nmap] = size(cm);

% grouped bar plot with colors defined by j index going from 1 to n in N discrete values - mapping the entire range of 
% selected colormap
h1 = bar(data);  
[M,N] = size(data);

for j = 1:N
  ind = fix(1+(mmap-1)*(j-1)/(N-1));
  col = cm(ind,:);
  h1(j).FaceColor = 'flat';
  h1(j).CData = col;
end

% hatchfill parameters
hfstyle = {'cross','cross','cross'};
hfangle = [45 45 45];
% generate hatch fills on the bar objects
hhf = gobjects(6,1);
for k = 1:3
    hhf(k) = hatchfill2(h1(k+4),hfstyle{k}, ...
                        'HatchAngle',hfangle(k), ...
                        'HatchDensity',50); % see note
end
% figure setup
set(gca,'TickLabelInterpreter','latex', 'LineWidth', 1,'FontSize',12, 'YMinorTick','on');
xlabel('$\textbf{Number of tasks}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylabel('$\textbf{Total delay [S]}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylim([0 9])
% assemble the legend
legendstr = {'\textbf{Kunlun model}', ...
             '\textbf{Proposed framework without AES}', ...
             '\textbf{Proposed framework with AES-128}', ...
             '\textbf{Proposed framework with AES-256}', ...
             '\textbf{Delay-energy-aware without AES}', ...
             '\textbf{Delay-energy-aware with AES-128}', ...
             '\textbf{Delay-energy-aware with AES-256}'};
[~,hlobj] = legendflex(h1,legendstr,'Interpreter','latex', ...
                    'Anchor',{'nw','nw'}, ...
                    'Buffer',[10 -10], ...
                    'FontWeight','bold', ...
                    'FontSize',9.5, ...
                    'FontName','Palatino Linotype'); 
% hatch the legend patches to match the bars 
for k = 4:6
    hhf(k) = hatchfill2(hlobj(k+8).Children,hfstyle{k-3}, ...
                        'HatchAngle',hfangle(k-3), ... % use the same parameters as before
                        'HatchDensity',20); % but density is different
end

[Mathieu NOE]

more fun with jet colormap - used in reversed order :

x = [1,2,3,4,5]; 
data=[0.405 0.25 1.14 1.39 0.20 1.09 1.34 ; 0.62 0.47  2.25 2.76 0.42 2.13 2.62;0.88 0.82  3.48  4.24  0.68 3.20  3.92 ;1.26 1.16 4.71  5.72 1.04 4.38 5.34 ;1.71 1.40 5.83 7.09  1.13 5.31  6.50 ];%all

cm = colormap('jet');
% cm = colormap('lines');

[mmap,nmap] = size(cm);

% grouped bar plot with colors defined by j index going from 1 to n in N discrete values - mapping the entire range of 
% selected colormap
h1 = bar(data);  
[M,N] = size(data);

for j = 1:N
  % for gradually changing colormaps use these lines 
  ind = fix(1+(mmap-1)*(j-1)/(N-1));
%   col = cm(ind,:); % ascending order
  col = cm(mmap + 1 - ind,:); % descending order
  
  % for discrete colormap like 'lines' use this line
%   col = cm(j,:); % ascending order
%   col = cm(N+1- j,:); % descending order
  
  h1(j).FaceColor = 'flat';
  h1(j).CData = col;
end

% hatchfill parameters
hfstyle = {'cross','cross','cross'};
hfangle = [45 45 45];
% generate hatch fills on the bar objects
hhf = gobjects(6,1);
for k = 1:3
    hhf(k) = hatchfill2(h1(k+4),hfstyle{k}, ...
                        'HatchAngle',hfangle(k), ...
                        'HatchDensity',50); % see note
end
% figure setup
set(gca,'TickLabelInterpreter','latex', 'LineWidth', 1,'FontSize',12, 'YMinorTick','on');
xlabel('$\textbf{Number of tasks}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylabel('$\textbf{Total delay [S]}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylim([0 9])
% assemble the legend
legendstr = {'\textbf{Kunlun model}', ...
             '\textbf{Proposed framework without AES}', ...
             '\textbf{Proposed framework with AES-128}', ...
             '\textbf{Proposed framework with AES-256}', ...
             '\textbf{Delay-energy-aware without AES}', ...
             '\textbf{Delay-energy-aware with AES-128}', ...
             '\textbf{Delay-energy-aware with AES-256}'};
[~,hlobj] = legendflex(h1,legendstr,'Interpreter','latex', ...
                    'Anchor',{'nw','nw'}, ...
                    'Buffer',[10 -10], ...
                    'FontWeight','bold', ...
                    'FontSize',9.5, ...
                    'FontName','Palatino Linotype'); 
% hatch the legend patches to match the bars 
for k = 4:6
    hhf(k) = hatchfill2(hlobj(k+8).Children,hfstyle{k-3}, ...
                        'HatchAngle',hfangle(k-3), ... % use the same parameters as before
                        'HatchDensity',20); % but density is different
end

[Mathieu NOE]

and if you have defined your own prefered colors lke an the example below :

x = [1,2,3,4,5]; 
data=[0.405 0.25 1.14 1.39 0.20 1.09 1.34 ; 0.62 0.47  2.25 2.76 0.42 2.13 2.62;0.88 0.82  3.48  4.24  0.68 3.20  3.92 ;1.26 1.16 4.71  5.72 1.04 4.38 5.34 ;1.71 1.40 5.83 7.09  1.13 5.31  6.50 ];%all

% my 8 prefered colors 
% [0.0,0.0,0.3]		% dark blue
% [1.0,1.0,0.0]		% bright yellow
% [0.0,1.0,0.0]		% bright gren
% [0.3,0.3,0.3]		% dark gray
% [1.0,0.4,0.2]		% orange
% [0.0,1.0,1.0]		% light blue
% [1.0,0.0,1.0]		% pink
% [0.9,0.9,0.9]		% light gray

cm = [[0.0,0.0,0.3]
[1.0,1.0,0.0]
[0.0,1.0,0.0]
[0.3,0.3,0.3]
[1.0,0.4,0.2]
[0.0,1.0,1.0]
[1.0,0.0,1.0]
[0.9,0.9,0.9]];

[mmap,nmap] = size(cm);

% grouped bar plot with colors defined by j index going from 1 to n in N discrete values 
h1 = bar(data);  
[M,N] = size(data);

for j = 1:N

  col = cm(j,:); % ascending order
%   col = cm(N+1- j,:); % descending order
  
  h1(j).FaceColor = 'flat';
  h1(j).CData = col;
end

% hatchfill parameters
hfstyle = {'cross','cross','cross'};
hfangle = [45 45 45];
% generate hatch fills on the bar objects
hhf = gobjects(6,1);
for k = 1:3
    hhf(k) = hatchfill2(h1(k+4),hfstyle{k}, ...
                        'HatchAngle',hfangle(k), ...
                        'HatchDensity',50); % see note
end
% figure setup
set(gca,'TickLabelInterpreter','latex', 'LineWidth', 1,'FontSize',12, 'YMinorTick','on');
xlabel('$\textbf{Number of tasks}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylabel('$\textbf{Total delay [S]}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylim([0 9])
% assemble the legend
legendstr = {'\textbf{Kunlun model}', ...
             '\textbf{Proposed framework without AES}', ...
             '\textbf{Proposed framework with AES-128}', ...
             '\textbf{Proposed framework with AES-256}', ...
             '\textbf{Delay-energy-aware without AES}', ...
             '\textbf{Delay-energy-aware with AES-128}', ...
             '\textbf{Delay-energy-aware with AES-256}'};
[~,hlobj] = legendflex(h1,legendstr,'Interpreter','latex', ...
                    'Anchor',{'nw','nw'}, ...
                    'Buffer',[10 -10], ...
                    'FontWeight','bold', ...
                    'FontSize',9.5, ...
                    'FontName','Palatino Linotype'); 
% hatch the legend patches to match the bars 
for k = 4:6
    hhf(k) = hatchfill2(hlobj(k+8).Children,hfstyle{k-3}, ...
                        'HatchAngle',hfangle(k-3), ... % use the same parameters as before
                        'HatchDensity',20); % but density is different
end

[Mathieu NOE]

fyi , you can use the colormapeditor command to create your own colormap

[bassant tolba]

Really this is amazing !!.. Thank you so muuuuuch for your effort. I really appreciate it.

The last question if you do not mind :D.. I will use the code of the last answer your provided which has the eight prefered colors, so is there any option to change the color of the hatched lines which is on bars also ?

and reallyyy thank you soo much...Hope you all the best

[Mathieu NOE]

what color would you like for the hatches ? same or individual ? for the last case , you already coded it in your original version of the code :

                        'HatchColor',hfcolor(k-3,:), ...

in this section

% hatch the legend patches to match the bars 
for k = 4:6
    hhf(k) = hatchfill2(hlobj(k+8).Children,hfstyle{k-3}, ...
                        'HatchAngle',hfangle(k-3), ... % use the same parameters as before
                        'HatchColor',hfcolor(k-3,:), ...
                        'HatchDensity',20); % but density is different
end

[bassant tolba]

yeah it worked !!.

Really, thank you sooo much..I really appreciate that.. I hope you all the best in your career really...

[Mathieu NOE]

tx u2

and if you like to play further with colors / colormaps , there are several good Fex submissions like

200 colormap - File Exchange - MATLAB Central

here one last example with : cm=slanCM('tab10',N);

x = [1,2,3,4,5]; 
data=[0.405 0.25 1.14 1.39 0.20 1.09 1.34 ; 0.62 0.47  2.25 2.76 0.42 2.13 2.62;0.88 0.82  3.48  4.24  0.68 3.20  3.92 ;1.26 1.16 4.71  5.72 1.04 4.38 5.34 ;1.71 1.40 5.83 7.09  1.13 5.31  6.50 ];%all

% grouped bar plot with colors defined by j index going from 1 to n in N discrete values 
h1 = bar(data);  
[M,N] = size(data);

cm=slanCM('tab10',N);

for j = 1:N
  col = cm(j,:); % ascending order
%   col = cm(N+1- j,:); % descending order
  h1(j).FaceColor = 'flat';
  h1(j).CData = col;
end

% hatchfill parameters
hfstyle = {'cross','cross','cross'};
hfangle = [45 45 45];
% generate hatch fills on the bar objects
hhf = gobjects(6,1);
for k = 1:3
    hhf(k) = hatchfill2(h1(k+4),hfstyle{k}, ...
                        'HatchAngle',hfangle(k), ...
                        'HatchDensity',50); % see note
end
% figure setup
set(gca,'TickLabelInterpreter','latex', 'LineWidth', 1,'FontSize',12, 'YMinorTick','on');
xlabel('$\textbf{Number of tasks}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylabel('$\textbf{Total delay [S]}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylim([0 9])
% assemble the legend
legendstr = {'\textbf{Kunlun model}', ...
             '\textbf{Proposed framework without AES}', ...
             '\textbf{Proposed framework with AES-128}', ...
             '\textbf{Proposed framework with AES-256}', ...
             '\textbf{Delay-energy-aware without AES}', ...
             '\textbf{Delay-energy-aware with AES-128}', ...
             '\textbf{Delay-energy-aware with AES-256}'};
[~,hlobj] = legendflex(h1,legendstr,'Interpreter','latex', ...
                    'Anchor',{'nw','nw'}, ...
                    'Buffer',[10 -10], ...
                    'FontWeight','bold', ...
                    'FontSize',9.5, ...
                    'FontName','Palatino Linotype'); 
% hatch the legend patches to match the bars 
for k = 4:6
    hhf(k) = hatchfill2(hlobj(k+8).Children,hfstyle{k-3}, ...
                        'HatchAngle',hfangle(k-3), ... % use the same parameters as before
                        'HatchDensity',20); % but density is different
end

[bassant tolba]

Ooh this is really amazing..

I will try it..also, please, I have one further question I’m sorry.. now I added a new bar.. and I tried to fix the indices like you showed me before, but the last bar does not appear in the legend.. kindly, please how can I fix it? …

Thank you sooo muchhhh

Here is my code.

x = [1,2,3,4,5]; 
data=[0.405 0.333 0.25 1.14 1.39 0.20 1.09 1.34 ; 0.62 0.52 0.47 2.25 2.76 0.42 2.13 2.62;0.88 0.86 0.82 3.48 4.24 0.68 3.20 3.92 ;1.26 1.21 1.16 4.71 5.72 1.04 4.38 5.34 ;1.71 1.55 1.40 5.83 7.09 1.13 5.31 6.50 ];%all
% my 8 prefered colors 
% [0.0,0.0,0.3] % dark blue
% [1.0,1.0,0.0] % bright yellow
% [0.0,1.0,0.0] % bright gren
% [0.3,0.3,0.3] % dark gray
% [1.0,0.4,0.2] % orange
% [0.0,1.0,1.0] % light blue
% [1.0,0.0,1.0] % pink
% [0.9,0.9,0.9] % light gray
cm=[[0.4940 0.1840 0.5560]
    [0.3010 0.7450 0.9330]
    [0 0.4470 0.7410]
    [0.8500 0.3250 0.0980]
    [0.9290 0.6940 0.1250]
    [1, 1, 1]
    [1, 1, 1]
    [1, 1, 1]]
% cm = [[0.0,0.0,0.3]
% [1.0,1.0,0.0]
% [0.0,1.0,0.0]
% [0.3,0.3,0.3]
% [1.0,0.4,0.2]
% [0.0,1.0,1.0]
% [1.0,0.0,1.0]
% [0.9,0.9,0.9]];
[mmap,nmap] = size(cm);
% grouped bar plot with colors defined by j index going from 1 to n in N discrete values 
h1 = bar(data); 
[M,N] = size(data);
for j = 1:N
    col = cm(j,:); % ascending order
    % col = cm(N+1- j,:); % descending order
    
    h1(j).FaceColor = 'flat';
    h1(j).CData = col;
end
% hatchfill parameters
hfstyle = {'cross','cross','cross'};
hfangle = [45 45 45];
hfcolor = cm([3 4 5],:);
% generate hatch fills on the bar objects
hhf = gobjects(6,1);
for k = 1:3
    hhf(k) = hatchfill2(h1(k+5),hfstyle{k}, ...
        'HatchAngle',hfangle(k), ...
        'HatchColor',hfcolor(k,:), ...
        'HatchDensity',50); % see note
end
% figure setup
set(gca,'TickLabelInterpreter','latex', 'LineWidth', 1,'FontSize',12, 'YMinorTick','on');
xlabel('$\textbf{Number of tasks}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylabel('$\textbf{Total delay [S]}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylim([0 9])
% assemble the legend
legendstr = {'\textbf{Kunlun model}', ...
    '\textbf{Proposed framework without AES}', ...
    '\textbf{Proposed framework with AES-128}', ...
    '\textbf{Proposed framework with AES-256}', ...
    '\textbf{Delay-energy-aware without AES}', ...
    '\textbf{Delay-energy-aware with AES-128}', ...
    '\textbf{Delay-energy-aware with AES-256}'};
[~,hlobj] = legendflex(h1,legendstr,'Interpreter','latex', ...
    'Anchor',{'nw','nw'}, ...
    'Buffer',[10 -10], ...
    'FontWeight','bold', ...
    'FontSize',9.5, ...
    'FontName','Palatino Linotype'); 
% hatch the legend patches to match the bars 
for k = 4:6
    hhf(k) = hatchfill2(hlobj(k+9).Children,hfstyle{k-3}, ...
        'HatchAngle',hfangle(k-3), ... % use the same parameters as before
        'HatchColor',hfcolor(k-3,:), ...
        'HatchDensity',20); % but density is different
end

[Mathieu NOE]

I prefered to change a bit the way everything is indexed in your code to make it more robust

so , normally, with the new code below , there is no risks of bad surprises (until next arrises !)

the only paramter you may want to change is the numerical value in this line : here we want the 5th and following bars to be white and hatched.

% define which bars must be hatched
% the numbers correspond to the bars that must appear white and hatched
col_index_hat = (5:N);

this defines which bars must be white and hatched (if I understand correctly what you want)

you can test the code with a different value (3 or 4 instead of 5) and see the effect

also you must ensure that the legendd size is matching the data size , otherwise you will get a wrong legend plot.

that's why I added this piece of code to add asmany legend entries as needed - but of course it's now your task to fill the legend with the right info's.

% if more data is added then we need to add also new legend entries         
 if numel(legendstr)< N
     for k =1:N-numel(legendstr)
        legendstr =[legendstr, '\textbf{new data}']; % add new string cells
     end
 end

this should be the result with the first data set (5 x 7 )

and with the larger data set (5 x 8)

full code :

% x = [1,2,3,4,5];  % seems we don't need this line

% 5 by 7 data
data=[0.405 0.25 1.14 1.39 0.20 1.09 1.34 ; 0.62 0.47  2.25 2.76 0.42 2.13 2.62;0.88 0.82  3.48  4.24  0.68 3.20  3.92 ;1.26 1.16 4.71  5.72 1.04 4.38 5.34 ;1.71 1.40 5.83 7.09  1.13 5.31  6.50 ];%all

% 5 by 8 data
% data=[0.405 0.333 0.25 1.14 1.39 0.20 1.09 1.34 ; 0.62 0.52 0.47 2.25 2.76 0.42 2.13 2.62;0.88 0.86 0.82 3.48 4.24 0.68 3.20 3.92 ;1.26 1.21 1.16 4.71 5.72 1.04 4.38 5.34 ;1.71 1.55 1.40 5.83 7.09 1.13 5.31 6.50 ];%all

% general colormap for bars (no need here to repeat a white line multiple times at the bottom)
cm=[[0.4940 0.1840 0.5560]
    [0.3010 0.7450 0.9330]
    [0 0.4470 0.7410]
    [0.8500 0.3250 0.0980]
    [0.9290 0.6940 0.1250]];

[mmap,nmap] = size(cm);

% colormap for hatches
hfcolor = [
[0.0,0.0,0.3]		% dark blue
[0.0,1.0,0.0]		% bright gren
[1.0,0.0,1.0]		% pink
[1.0,0.4,0.2]		% orange
[0.0,1.0,1.0]		% light blue
[0.3,0.3,0.3]		% dark gray
[0.9,0.9,0.9]		% light gray
[1.0,1.0,0.0]		% bright yellow
];

% grouped bar plot with colors defined by j index going from 1 to n in N discrete values 
h1 = bar(data);  
[M,N] = size(data);

% define which bars must be hatched
% the numbers correspond to the bars that must appear white and hatched
col_index_hat = (5:N);

% color management (hatched vs. non hatched bars)
for j = 1:N
    % either pick a "true" color or white according to bar number 
    if j>=col_index_hat(1) % use white col only for hatched bars
      col = [1, 1, 1];
  else
    col = cm(j,:); % ascending order
%   col = cm(N+1- j,:); % descending order
  end
  
  h1(j).FaceColor = 'flat';
  h1(j).CData = col;
end

% hatchfill parameters (valid whatever the number of hatched bars)
hfstyle = 'cross';
hfangle = [45];

% generate hatch fills on the bar objects
% hhf = gobjects(6,1); % seems we don't need this line
for k = 1:numel(col_index_hat)
    hhf(k) = hatchfill2(h1(col_index_hat(k)),hfstyle, ...
                        'HatchAngle',hfangle, ...
                        'HatchColor',hfcolor(k,:), ...
                        'HatchDensity',50); % see note
end

% figure setup
set(gca,'TickLabelInterpreter','latex', 'LineWidth', 1,'FontSize',12, 'YMinorTick','on');
xlabel('$\textbf{Number of tasks}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylabel('$\textbf{Total delay [S]}$','FontWeight','bold','FontSize',12,...
    'FontName','Palatino Linotype','Interpreter','latex');
ylim([0 9])

% assemble the legend
legendstr = {'\textbf{Kunlun model}', ...
             '\textbf{Proposed framework without AES}', ...
             '\textbf{Proposed framework with AES-128}', ...
             '\textbf{Proposed framework with AES-256}', ...
             '\textbf{Delay-energy-aware without AES}', ...
             '\textbf{Delay-energy-aware with AES-128}', ...
             '\textbf{Delay-energy-aware with AES-256}'};
         
% if more data is added then we need to add also new legend entries         
 if numel(legendstr)< N
     for k =1:N-numel(legendstr)
        legendstr =[legendstr, '\textbf{new data}']; % add new string cells
     end
 end
         
[~,hlobj] = legendflex(h1,legendstr,'Interpreter','latex', ...
                    'Anchor',{'nw','nw'}, ...
                    'Buffer',[10 -10], ...
                    'FontWeight','bold', ...
                    'FontSize',9.5, ...
                    'FontName','Palatino Linotype'); 
                
% hatch the legend patches to match the bars 
for k = 1:numel(col_index_hat)
    hhf(k) = hatchfill2(hlobj(col_index_hat(k)+N).Children,hfstyle, ...
                        'HatchAngle',hfangle, ... % use the same parameters as before
                        'HatchColor',hfcolor(k,:), ...    
                        'HatchDensity',20); % but density is different
end

[bassant tolba]

Really thank you soo much for your effort. I deeply appreciate that.. you helped me so much.. I hope you all the best and moreee.

[Mathieu NOE]

tx

have a nice day