How can I plot a diagram with 12-15 different colors

Question

Subham Mahanti 2023-4-24

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1952143-how-can-i-plot-a-diagram-with-12-15-different-colors

评论： Subham Mahanti 2023-4-24

I am plotting this graph and each graph has a different argument (y value) to it, now i want to give all the graphs different colours , how can i do that , if anyone knows please help. (Figure 2 of the Code)

clc;

clear all;

t=2.5; %ineV

a=1.42e-10; %inAngstrom

h1=1e-3;

ka=-3.14:h1:3.14;

%defineing the self interaction within the unitcell

H0=zeros(12,12);

H0(1,2)=t;

H0(2,1)=t;

H0(2,3)=t;

H0(2,5)=t;

H0(3,2)=t;

H0(3,5)=t;

H0(3,8)=t;

H0(4,3)=t;

H0(5,2)=t;

H0(5,6)=t;

H0(6,5)=t;

H0(6,7)=t;

H0(6,9)=t;

H0(7,6)=t;

H0(7,8)=t;

H0(8,3)=t;

H0(8,7)=t;

H0(9,6)=t;

H0(9,10)=t;

H0(10,9)=t;

H0(10,11)=t;

H0(11,10)=t;

H0(11,12)=t;

H0(12,7)=t;

H0(12,11)=t;

%definingH1At a (RHS)of H0

H1=zeros(12,12);

H1(4,1)=t;

H1(8,5)=t;

H1(12,9)=t;

%defineing H2 at-a (LHS)of H0

H2=transpose(H1);

ep=exp(i*ka);

for j=1:length(ka)

%j

%ka(1,j)

if ka(1,j)==0

zeroKaindex=j

end

h=H0+H1.*exp(i*ka(1,j))+H2.*exp(-i*ka(1,j));

E=abs(eig(h)); %12x1 collum matrix

E1(1,j)=E(1,1); %taking only the 1st eigen value outof 12

E2(1,j)=E(2,1);%taking only the 2nd eigen value outof 12

E3(1,j)=E(3,1);%taking only the 3rd eigen value outof 12

E4(1,j)=E(4,1);%taking only the 4th eigen value outof 12

E5(1,j)=E(5,1);%taking only the 5th eigen value outof 12

E6(1,j)=E(6,1);%..so on

E7(1,j)=E(7,1);

E8(1,j)=E(8,1);

E9(1,j)=E(9,1);

E10(1,j)=E(10,1);

E11(1,j)=E(11,1);

E12(1,j)=E(12,1);

end

zeroKaindex = 3141

%% Plot of Band diagram

figure(1)

hold on

grid on;title("Energy values at Ka=0");

yline(E1(1,zeroKaindex),'r','E1')

yline(E2(1,zeroKaindex),'g','E2')

yline(E3(1,zeroKaindex),'b','E3')

yline(E4(1,zeroKaindex),'k','E4')

yline(E5(1,zeroKaindex),'--r','E5')

yline(E6(1,zeroKaindex),'--g','E6')

yline(E7(1,zeroKaindex),'b--','E7')

yline(E8(1,zeroKaindex),'-.g','E8')

yline(E9(1,zeroKaindex),'.c','E9')

Warning: Marker input is ignored.

yline(E10(1,zeroKaindex),'--c','E10')

yline(E11(1,zeroKaindex),'-.k','E11')

yline(E12(1,zeroKaindex),'-.g','E12')

bandgap_in_eV=E1(1,zeroKaindex)-E3(1,zeroKaindex)

bandgap_in_eV = 0.6262

axes = gca;

axes.LineWidth=0.75; axes.FontSize=15; axes.FontWeight='bold';axes.Box='on';

lines = axes.Children;

set(lines,'LineWidth', 2);

%%this is where i need help

figure(2)

hold on; grid on;title("BAND diagram");

plot(ka,E1, 'r--','LineWidth',0.8);

plot(ka,E2, '-.k','LineWidth',0.8);

plot(ka,E3, '-.g','LineWidth',0.8);

plot(ka,E4, '-.b','LineWidth',0.8);

plot(ka,E5, '-k','LineWidth',0.8);

plot(ka,E6, 'g--','LineWidth',0.8);

plot(ka,E7, '-r','LineWidth',0.8);

plot(ka,E8, '-g','LineWidth',0.8);

plot(ka,E9, '-b','LineWidth',0.8);

plot(ka,E10, '-c','LineWidth',0.8);

plot(ka,E11, '-m','LineWidth',0.8);

plot(ka,E12, 'y--','LineWidth',0.8);

xlabel('ka');

ylabel('energy E in eV');

axes = gca;

axes.LineWidth=0.75; axes.FontSize=15; axes.FontWeight='bold';axes.Box='on';

lines = axes.Children;

set(lines,'LineWidth', 2);

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Stephen23 2023-4-24

"now i want to give all the graphs different colours , how can i do that"

You would need to generate 15 different colors, e.g.:

https://www.mathworks.com/matlabcentral/fileexchange/70215-maximally-distinct-color-generator

Subham Mahanti 2023-4-24

Okay , but how to do that in this context , i mean how to incorporate that into my plot , if there is any alternate easier way then also suggest

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Answer 1

Alan Stevens 2023-4-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1952143-how-can-i-plot-a-diagram-with-12-15-different-colors#answer_1221958

在 MATLAB Online 中打开

Specify the colors with RGB triplets.

doc Color

7 个评论
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Steven Lord 2023-4-24

在 MATLAB Online 中打开

Use uisetcolor. For example I brought up that dialog (using the code I commented out below, since it won't work on MATLAB Answers) and selected a dark-ish pink. It returned a certain vector that I've approximated below.

% c = uisetcolor;

c = [0.9686, 0.5137, 0.7333];

surf(peaks, 'FaceColor', c)