Change the colour of individual markers in the plot

Hello everyone,

I have this code and I would like to individually change the colours of some points on the graph. How can I do this manually?

Thanks

clear all
close all 
clc

x1 = linspace(0.974,1.366,9) ;
x2 = linspace(0.929,1.321,11) ;
x3 = linspace(0.848643,1.240643,14);
x4 = linspace(0.779,1.171,18);
x5 = linspace(0.718063,1.110063,22);
x6 = linspace(0.664294,1.056294,26);
x7 = linspace(0.616500,1.008500,28);
x8 = linspace(0.573737,0.965737,29);
x9 = linspace(0.535250,0.927250,28);
x10 = linspace(0.500429,0.892429,26);
x11 = linspace(0.468773,0.860773,22);
x12 = linspace(0.439870,0.831870,18);
x13 = linspace(0.413375,0.805375,14);
x14 = linspace(0.389,0.781,11);
x15 = linspace(0.3665,0.7585,8);
x16 = linspace(0.345667,0.737667,5);

y1 = zeros(size(x1)) ; 
y2 = zeros(size(x2)) ;
y3 = zeros(size(x3)) ;
y4 = zeros(size(x4)) ;
y5 = zeros(size(x5)) ;
y6 = zeros(size(x6)) ;
y7 = zeros(size(x7)) ;
y8 = zeros(size(x8)) ;
y9 = zeros(size(x9)) ;
y10 = zeros(size(x10)) ;
y11 = zeros(size(x11)) ;
y12 = zeros(size(x12)) ;
y13 = zeros(size(x13)) ;
y14 = zeros(size(x14)) ;
y15 = zeros(size(x15)) ;
y16 = zeros(size(x16)) ;

 plot(x1,y1,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 3)
 hold on
  plot(x2,y2,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 3.5)
 hold on
  plot(x3,y3,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 4)
 hold on
  plot(x4,y4,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 4.5)
 hold on
  plot(x5,y5,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 5)
 hold on
  plot(x6,y6,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 5.5)
 hold on
  plot(x7,y7,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 6)
 hold on
  plot(x8,y8,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 6.5)
 hold on
  plot(x9,y9,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 7)
 hold on
  plot(x10,y10,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 7.5)
 hold on
  plot(x11,y11,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 8)
 hold on
  plot(x12,y12,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 8.5)
 hold on
  plot(x13,y13,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 9)
 hold on
  plot(x14,y14,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 9.5)
 hold on
  plot(x15,y15,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 10)
 hold on
  plot(x16,y16,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 10.5)
 hold on
 scatter(0,1.7,2000,'filled','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1.5)
          text(0,1.7,'1.7m','HorizontalAlignment','Center');
xlabel('Distance (m)')
ylabel('Height (m)')

[jonas]

a bit off topic, but you need this!

[Adam Danz]

scatter() and gscatter() give you some control over single marker colors.

Alternatively, you can using indexing to plot groups of coordinates that should have different colors.

Answer 1

[KSSV]

x1 = linspace(0.974,1.366,9) ;
x2 = linspace(0.929,1.321,11) ;
x3 = linspace(0.848643,1.240643,14);
x4 = linspace(0.779,1.171,18);
x5 = linspace(0.718063,1.110063,22);
x6 = linspace(0.664294,1.056294,26);
x7 = linspace(0.616500,1.008500,28);
x8 = linspace(0.573737,0.965737,29);
x9 = linspace(0.535250,0.927250,28);
x10 = linspace(0.500429,0.892429,26);
x11 = linspace(0.468773,0.860773,22);
x12 = linspace(0.439870,0.831870,18);
x13 = linspace(0.413375,0.805375,14);
x14 = linspace(0.389,0.781,11);
x15 = linspace(0.3665,0.7585,8);
x16 = linspace(0.345667,0.737667,5);



y1 = zeros(size(x1)) ; 
y2 = zeros(size(x2)) ;
y3 = zeros(size(x3)) ;
y4 = zeros(size(x4)) ;
y5 = zeros(size(x5)) ;
y6 = zeros(size(x6)) ;
y7 = zeros(size(x7)) ;
y8 = zeros(size(x8)) ;
y9 = zeros(size(x9)) ;
y10 = zeros(size(x10)) ;
y11 = zeros(size(x11)) ;
y12 = zeros(size(x12)) ;
y13 = zeros(size(x13)) ;
y14 = zeros(size(x14)) ;
y15 = zeros(size(x15)) ;
y16 = zeros(size(x16)) ;

 plot(x1,y1,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 3)
 hold on
  plot(x2,y2,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 3.5)
 hold on
  plot(x3,y3,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 4)
 hold on
  plot(x4,y4,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 4.5)
 hold on
  plot(x5,y5,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',[0.5843 0.8157 0.9882],...
              'LineWidth',1, 'MarkerSize', 5)
 hold on
  plot(x6,y6,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 5.5)
 hold on
  plot(x7,y7,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 6)
 hold on
  plot(x8,y8,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 6.5)
 hold on
  plot(x9,y9,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 7)
 hold on
  plot(x10,y10,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 7.5)
 hold on
  plot(x11,y11,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 8)
 hold on
  plot(x12,y12,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 8.5)
 hold on
  plot(x13,y13,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 9)
 hold on
  plot(x14,y14,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 9.5)
 hold on
  plot(x15,y15,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 10)
 hold on
  plot(x16,y16,'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 10.5)
 hold on
 scatter(0,1.7,2000,'filled','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1.5)
          text(0,1.7,'1.7m','HorizontalAlignment','Center');
xlabel('Distance (m)')
ylabel('Height (m)')

[KSSV]

You can simplify the code:

L = [0.974,1.366,9
    0.929,1.321,11
    0.848643,1.240643,14 
    0.779,1.171,18
    0.718063,1.110063,22
    0.664294,1.056294,26
    0.616500,1.008500,28 
    0.573737,0.965737,29
    0.535250,0.927250,28 
    0.500429,0.892429,26 
    0.468773,0.860773,22 
    0.439870,0.831870,18 
    0.413375,0.805375,14 
    0.389,0.781,11
    0.3665,0.7585,8 
    0.345667,0.737667,5] ;      
N = size(L,1) ; 
x = cell(N,1) ; 
for i = 1:N
  x{i} = linspace(L(i,1),L(i,2),L(i,3)) ; 
end

figure
hold on
for i = 1:N
  plot(x{i},zeros(size(x{i})),'o','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1, 'MarkerSize', 10)              
end
scatter(0,1.7,2000,'filled','MarkerEdgeColor',[0 0 1],...
              'MarkerFaceColor',rand(1,3),...
              'LineWidth',1.5)

text(0,1.7,'1.7m','HorizontalAlignment','Center');
xlabel('Distance (m)')
ylabel('Height (m)')

Also read about gscatter. Associate a value to each x{1} and use gscatter.

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Thanks a lot KSSV. You helped me save a ton of time :)