I have a function that adds a legend I want to make the legend grou... (2024)

hello

you could probably use this Fex submission to get to this result

so each group of 3 data could have same color and just different linestyle / markerstyle

other interesting legend tweaks are available on the same Fex (search "legend")

Nsamples = 7;

G=ones(1,2*Nsamples);

G(1:2:5)=1;

G(2:2:6)=2;

G(7:2:11)=3;

G(8:2:12)=4;

G(13:14)=5;

M={'x','+','*','s','d'}; % a morker for each group

C={'r','b','k','m','g'}; % and a color

L = 100; % coupon gauge section (mm)

A = 17; % coupon cross-sectional area (mm^2)

figure(1);

hold on

figure(2);

hold on

for k = 1:Nsamples

file_name = ['Sample' num2str(k) '.csv'];

T = readtable(file_name,'VariableNamingRule','preserve');

[test(k).disp,test(k).force,test(k).eyy] = post_fun(T);

ig=G(k); % get group id for kth file

figure(1)

h(k) = plot(test(k).disp,test(k).force,'LineWidth',2,'Marker',M(ig),'Color',C{ig});

figure(2)

g(k) = plot(test(k).eyy*100,1000*test(k).force/A,'LineWidth',2,'Marker',M(ig),'Color',C{ig});

leg_string{k} = ['Group ' num2str(ig)];

end

%

figure(1)

set(gcf,'Position',[200 200 1024 768],'Color',[1 1 1]);

set(gca,'FontSize',24);

xlabel('Displacement (mm)','FontSize',32,'Interpreter','latex');

ylabel('Force (kN)','FontSize',32,'Interpreter','latex');

box on

grid on

legend(h([1 2 7]),leg_string([1 2 7]),'FontSize',28,'Interpreter','latex','location','northwest');

figure(2)

set(gcf,'Position',[200 200 1024 768],'Color',[1 1 1]);

set(gca,'FontSize',24);

xlabel('Strain (\%)','FontSize',32,'Interpreter','latex');

ylabel('Stress (MPa)','FontSize',32,'Interpreter','latex');

box on

grid on

legend(g([1 2 7]),leg_string([1 2 7]),'FontSize',28,'Interpreter','latex','location','northwest');

function [displ,force,eyy] = post_fun(T)

displ=T{:,4};

force=T{:,end};

eyy =T{:,10};

ix=all(isfinite([displ force eyy]),2) & all([displ force eyy]>0,2);

displ=displ(ix);

force=force(ix);

eyy=eyy(ix);

[~,imax] = max(force);

displ(imax+1:end) = [];

force(imax+1:end) = [];

eyy(imax+1:end) = [];

end

% Nsamples = 7;

%

L = 100; % coupon gauge section (mm)

A = 17; % coupon cross-sectional area (mm^2)

%

%

% pos array

posA = [200 200 1024 768];

f1 = figure('Position',posA,'Color',[1 1 1]); hold on

a1 = gca;

f2 = figure('Position',posA,'Color',[1 1 1]); hold on

a2 = gca;

% line style / colors

colors = [

0 0 1

1 0 0

0 0.75 0

0.5 0 0.5

1 0.5 0

];

styles = {'-','--','-.'};

inds = 0; % index for style indexing

spacing = size(styles,2); % period for style indexing

indc = 1; % index for color indexing

% Let us say samples 1,3,5 - is group 1

% and 2,4,6- is group 2

% 7,9,11 group 3

% 8,10,12 is group 4

% and finally 13 & 14 is group 5

% create a list of groups of 3 data files according to description above :

% list = [1 3 5 2 4 6 7 9 11 8 10 12 13 14]

list = [1 3 5 2 4 6 7 ] % here we have only 7 files

for ck = 1:numel(list)

k = list(ck);

% colors and linestyle index management

inds = inds +1;

if inds >spacing

inds = inds - spacing;

indc = indc +1;

end

%

file_name = ['Sample' num2str(k) '.csv'];

%

T = readtable(file_name,'VariableNamingRule','preserve');

%

[disp,force,eyy] = post_fun(T);

%

h = plot(a1,disp,force,'LineWidth',2,"color",colors(indc,:),"linestyle",styles{inds});

set(a1,'FontSize',24);

xlabel(a1,'Displacement (mm)','FontSize',32,'Interpreter','latex');

ylabel(a1,'Force (kN)','FontSize',32,'Interpreter','latex');

box on; grid on

%

g = plot(a2,eyy*100,1000*force/A,'LineWidth',2,"color",colors(indc,:),"linestyle",styles{inds});

set(a2,'FontSize',24);

xlabel(a2,'Strain (\%)','FontSize',32,'Interpreter','latex');

ylabel(a2,'Stress (MPa)','FontSize',32,'Interpreter','latex');

box on; grid on

%

leg_string{ck,1} = ['Group ' num2str(indc) ' / Sample ' num2str(k)];

%

end

%

legend(a1,leg_string,'FontSize',13,'Interpreter','latex');

legend(a2,leg_string,'FontSize',13,'Interpreter','latex');

%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%ùù

function [disp,force,eyy] = post_fun(T)

%

% disp = table2array(T(:,4));

% force = table2array(T(:,end));

% eyy = table2array(T(:,10));

d = table2array(T); % one single call to table2array is enough

disp = d(:,4);

force = d(:,end);

eyy = d(:,10);

%

index = isnan(disp) | isnan(force) | isnan(eyy) | disp < 0 | force < 0 | eyy < 0;

%

disp(index) = [];

force(index) = [];

eyy(index) = [];

%

[~,index] = max(force);

disp(index+1:end) = [];

force(index+1:end) = [];

eyy(index+1:end) = [];

%

end

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