How to control appearance of certain graphs legend in a multi graph plot?

Question

Alon Rozen 2018-12-19

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/436494-how-to-control-appearance-of-certain-graphs-legend-in-a-multi-graph-plot

评论： Alon Rozen 2018-12-19

Hi all,

I have the following code which produce a multi fraph plot on an axes which I identify as 'H'

Legend_Data = cell(Some_Number); 
for i = 1:Some_Number
   plot3(H,X,Y,Z,[Marker,Color]); 
   Legend_Data{i} = 'Some text';
end

'H' is the axes (in a GUI) in which I want to plot all the graphs.

In each iteration the vectors X,Y,Z are different as well as the sting 'Some text'. Also, the marker used for the graph and its color are changed.

At the end, based on some logic, I wand to desplay a legend but to exclude some of entries. Of course, I want the remaining data to be correctly associated with the right graphs.

I read some sugesstions over the net but couldn't figure out how to apply them to this code. Most of them were related to cases where all graphs are ploted at once.

Can it be done?

Thanks in advance,

Alon

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Alon Rozen 2018-12-19

I don't knoe beforehand what plots I will need. It depends on some calculations. So I can't prepare exactly the ones I will want to use. Sometimes it will be this number and sometime a different number. I will find the i's which suit presentation. Can I automate the 'legend' command?

madhan ravi 2018-12-19

Refer my answer below https://in.mathworks.com/matlabcentral/answers/436494-how-to-control-appearance-of-certain-graphs-legend-in-a-multi-graph-plot#answer_353119

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Answer 1

madhan ravi 2018-12-19

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/436494-how-to-control-appearance-of-certain-graphs-legend-in-a-multi-graph-plot#answer_353119

在 MATLAB Online 中打开

Comment reposted as answer:

x=rand(10,5);
y=rand(10,5);
z=rand(10,5);
h=cell(1,5);
c={'a','b','c','d','e'};
for i = 1:5
   h{i}=plot3(x(:,i),y(:,i),z(:,i));
   hold on
end
legend([h{1} h{3} h{5}],c{1},c{3},c{5})

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madhan ravi 2018-12-19

编辑：madhan ravi 2018-12-19

can you give an example of your legend contents so that the solution can be narrowed down ?

See https://in.mathworks.com/matlabcentral/answers/48112-how-to-change-matlab-plot-legend-automatically#answer_58741

Alon Rozen 2018-12-19

在 MATLAB Online 中打开

I have two sets of data - A_Data and B_Data.

In each set the data has a data ID. So I have A_IDs and B_IDs.

I plot all on the same axis:

% Prepare:
H         = My_Axis; 
Num_Of_A  = length(A_IDs);
Num_Of_B  = length(B_IDs);
Lgnd_Cell = cell(Num_Of_A+Num_Of_B,1); 
Lgnd_Indx = true(Num_Of_A+Num_Of_B,1)
% Plot A data:
for i = 1:Num_Of_A
    Data = Data_A{i}; 
    plot3(H,Data(:,1),Data(:,2),Data(:,3),['Certain_Shape' 'Certain_Color']); 
    hold on; 
    Lgnd_Cell{i} = ['A Data ' num2str(A_IDs(i))]; 
    Lgnd_Indx(i) = Determine_If_To_Show_This_Data_Legend(Data);
end
% Plot B data:
for i = 1:Num_Of_A
    Data = Data_A{i}; 
    plot3(H,Data(:,1),Data(:,2),Data(:,3),['Certain_Shape' 'Certain_Color']); 
    hold on;
    Lgnd_Cell{Num_Of_A+i} = ['A Data ' num2str(A_IDs(i))]; 
    Lgnd_Indx(Num_Of_A+i) = Determine_If_To_Show_This_Data_Legend(Data);
end