Stem plot with minimal spaces between lines

Question

shane watson 2019-12-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/495986-stem-plot-with-minimal-spaces-between-lines

评论： Adam Danz 2019-12-14

Hello,

I'm using stem plot to show my data here is my code. However, my question is there are spaces between two stem lines, I wanted to fill the space with same stem lines, can someone guide me regarding this. e.g., stem plots 5 and 5 but I really need to insert some more line between these vaules to fill the space and the total array values remain 24 same. Thanks in advace.

t=[5 5 5 5 5 5 6 2 2 2 2 4 4 4 4 4 4 4 1 1 6 6 6 6];

stem(t,'-s','MarkerFaceColor',[0 1 0],'LineWidth',1.5);

hold on

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Adam Danz 2019-12-11

Done. Let me know if there are any other loose ends.

shane watson 2019-12-11

@Adam, Fantastic, you're great. The Only things that make me in trouble is now the legend problem, I have three data 1, data 2, data 3. 'data 1' is simple plot, 'data 2' is filled with color and polkadots and '3' is filled with color only. So the legend should show this way, but in my case legend show the data but in data 2 only shows symbol and in data 3 shows the color of data 2. Kindly see image it illustrates the problem.

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Answer 1

Adam Danz 2019-12-11

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"The Only things that make me in trouble is now the legend problem, I have three data 1, data 2, data 3."

Method 1: turn off IconDisplayStyle

Two steps:

1) turn off the icon display of the polkadot handle

2) call legend after you to step 1.

h = plot(inX,inY,'k.','MarkerSize',4,'MarkerFaceColor','k'); % Plot polkadots
h.Annotation.LegendInformation.IconDisplayStyle = 'off'      % Turn off legend display for polkadots
legend(. . .)                                                % Create the legend

Method 2: Specify handles in legend

Two steps:

1) get the handles to all objects you want in the legend

2) Create the legend at the end and provide those handles as input.

hold on
h1 = plot(. . ., 'DisplayName', 'Legend1');      % plot stuff that should appear on legend
h2 = plot(. . ., 'DisplayName', 'Legend2');      % plot more stuff that goes on the legend
h3 = plot(. . . );      % Polkadots
% at the end of the plotting stuff
legend([h1,h2])

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shane watson 2019-12-11

在 MATLAB Online 中打开

Thanks for answer, however, I got error for the second method and the first methond doesnot make any changes therefore for the sake for understanding here is my code. Just for the consideration I would say that for "data 2" I wanted to show in the legend the filled colour as well as polkadots. Sorry for taking your time

t=[5 5 5 5 5 5 6 2 2 2 2 4 4 4 4 4 4 4 1 1 6 6 6 6];
t1=[1 2 3 4 5 9 5 6 7 8 39 42 31 2 3 4 5 6 7 8 9 22 23 24];
t2=[11 12 13 14 15 19 15 16 17 8 3 4 3 2 13 14 15 16 17 8 9 22 23 24];
x1=stairs(t,'-s','MarkerFaceColor',[0.9290 0.6940 0.1250],'MarkerSize',4,'LineWidth',1.5);
hold on
sh2=stairs(1:24,t1, 'o','color',[1 0 0],'MarkerEdgeColor','r', 'MarkerSize',4,'LineWidth',1.3);
x = [sh2.XData(1),repelem(sh2.XData(2:end),2)];
y = [repelem(sh2.YData(1:end-1),2),sh2.YData(end)];
polyX = [x,fliplr(x)];
polyY = [y,bottom*ones(size(y))]; 
viu=fill(polyX,polyY,[1 0 0])
viu.FaceAlpha = 0.2;
[dotsX,dotsY] = ndgrid(...
    linspace(min(polyX), max(polyX), 50), ...    
    linspace(min(polyY), max(polyY), 50));      
[in,on] = inpolygon(dotsX,dotsY,polyX,polyY); 
inX = dotsX(in|on); 
inY = dotsY(in|on); 
h = plot(inX,inY,'k.','MarkerSize',4,'MarkerFaceColor','k'); 
hold on
sh=stairs(1:24,t2,'-d','color',[1 1 0],'LineWidth',1);             
bottom = 0; 
x = [sh.XData(1),repelem(sh.XData(2:end),2)];
y = [repelem(sh.YData(1:end-1),2),sh.YData(end)];
h=fill([x,fliplr(x)],[y,bottom*ones(size(y))],[1 1 0]);
h.FaceAlpha = 0.4;
hold on
xlabel('x-axis');
ylabel('y-axis');
yyaxis right
ylabel('Related funciton');
xlim([1 20]);
ylim([0 20]);
hold on
plt = gca;
plt.YAxis(2).Color = 'k';
set(gca, 'XTick',1:24, 'XTickLabel',{'1' '' '' '' '7' '' '' '' '8' '' '' '' '1' '' '' '' '7' '' '' '' '9' '' '' '1'});
title('Each Daybase information');
hold on
h1 = plot(x1, 'data 1', 'Legend1');      
h2 = plot(sh1, 'data 2', 'Legend2');     
h3 = plot(sh2, 'data 3', 'Legend1');      
% at the end of the plotting stuff
legend([h1,h2, h3])
Load1=legend('Data1','Data2 ','Data','FontWeight', 'bold');
Load1.FontSize = 9;
grid on

shane watson 2019-12-12

编辑：shane watson 2019-12-12

在 MATLAB Online 中打开

The error was "Not enough input arguments" and Yes I was aiming as you mentioned but couldn't get it. Now as you mentioned (Lastly) and I'm trying two things

(1) that in legend only filled color appear for data 2 and data 3 case.

(2) worest case only line with marker style appears

I used your first method to skip polkadot, however, I don't get this for second data which shows line with marzker style instead of filled color, can you put light on that, I wil add code again

t=[5 5 5 5 5 5 6 2 2 2 2 4 4 4 4 4 4 4 1 1 6 6 6 6];
t1=[1 2 3 4 5 9 5 6 7 8 39 42 31 2 3 4 5 6 7 8 9 22 23 24];
t2=[11 12 13 14 15 19 15 16 17 8 3 4 3 2 13 14 15 16 17 8 9 22 23 24];
x1=stairs(t,'-s','MarkerFaceColor',[0.9290 0.6940 0.1250],'MarkerSize',4,'LineWidth',1.5);
hold on
sh2=stairs(1:24,t1, 'o','color',[1 0 0],'MarkerEdgeColor','r', 'MarkerSize',4,'LineWidth',1.3);
sh2.Annotation.LegendInformation.IconDisplayStyle = 'off'      % Turn off legend display for polkadots
% The step you mentioned%
x = [sh2.XData(1),repelem(sh2.XData(2:end),2)];
y = [repelem(sh2.YData(1:end-1),2),sh2.YData(end)];
polyX = [x,fliplr(x)];
polyY = [y,bottom*ones(size(y))]; 
viu=fill(polyX,polyY,[1 0 0])
viu.FaceAlpha = 0.2;
[dotsX,dotsY] = ndgrid(...
    linspace(min(polyX), max(polyX), 50), ...    
    linspace(min(polyY), max(polyY), 50));      
[in,on] = inpolygon(dotsX,dotsY,polyX,polyY); 
inX = dotsX(in|on); 
inY = dotsY(in|on); 
h = plot(inX,inY,'k.','MarkerSize',4,'MarkerFaceColor','k'); 
hold on
sh=stairs(1:24,t2,'-d','color',[1 1 0],'LineWidth',1);             
bottom = 0; 
x = [sh.XData(1),repelem(sh.XData(2:end),2)];
y = [repelem(sh.YData(1:end-1),2),sh.YData(end)];
h=fill([x,fliplr(x)],[y,bottom*ones(size(y))],[1 1 0]);
h.FaceAlpha = 0.4;
hold on
xlabel('x-axis');
ylabel('y-axis');
yyaxis right
ylabel('Related funciton');
xlim([1 20]);
ylim([0 20]);
hold on
plt = gca;
plt.YAxis(2).Color = 'k';
set(gca, 'XTick',1:24, 'XTickLabel',{'1' '' '' '' '7' '' '' '' '8' '' '' '' '1' '' '' '' '7' '' '' '' '9' '' '' '1'});
title('Each Daybase information');
hold o
Load1=legend('Data1','Data2 ','Data','FontWeight', 'bold');
Load1.FontSize = 9;
grid on

Adam Danz 2019-12-12

在 MATLAB Online 中打开

Follow these easy steps to get your legend right. If you tried it and the legend still isn't correct, share your updated code and I'll point out which lines are incorrect.

1. For every object on your axes that you want to appear in the legend, add a DisplayName. Here are examples (you can change the display names).

x1=stairs(t,'-s','MarkerFaceColor',[0.9290 0.6940 0.1250],...
    'MarkerSize',4,'LineWidth',1.5,'DisplayName', 'Data1');
%                                   ^^^^^^^^^^^^^^^^^^^^^^
viu=fill(polyX,polyY,[1 0 0], 'DisplayName', 'Fill1')
%                              ^^^^^^^^^^^^^^^^^^^^^
h = plot(inX,inY,'k.','MarkerSize',4,'MarkerFaceColor','k',...
    'DisplayName','MyOtherData')
%    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ 

2. If there are any objects that you don't want on the legend apply this to the object handle.

  sh2.Annotation.LegendInformation.IconDisplayStyle = 'off'   
% ^^^ put object handle here

3. If you've done steps 1 and 2 correctly, when you call legend you just have to use this line without any inputs. This goes at the end of the plotting code.

Load1 = legend(); % no inputs needed!

shane watson 2019-12-13

You are real mentor @Adam Danz, I will keep you in my loop for the help. (I sent you a message can you respond to that).

Thank you

Adam Danz 2019-12-14

Thank you, Shane; glad I can help out!

Just FYI, I didn't receive a message, in case it's important.

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Stem plot with minimal spaces between lines

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