How to add a verteical pad obove and below the curve and graph style and color displays?

Question

Nisar Ahmed 2022-6-1

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回答： Mathieu NOE 2022-6-3

testdata.mat

Hello,

I have two questions and the data is attached to the question:

Q1) Lest hand side code is for the figure on right hand side. How I can the color of each curve and curve style (dotted, asterisk, etc.) by myself in the code instead of MATLAB is chossing automatically?

Q2) In the figure on right hand side, qp at various f are plotted against VD. I have attached a data having VD and one of qp curve. the qp curves not of same length of VD. I want to add a pad above and below the qp curves such that it becomes equal to VD. The pad values should be between 0.001 to 0.002. How I can do it?

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Mathieu NOE 2022-6-1

在 MATLAB Online 中打开

FYI, a few options I tried to change automatically colors and linestyles (if that is ok for you) inside your loop

had to modify the plot code as for the time being I cannot use the provided x, y data
used some Filexchange submissions to get to this result

Colorspace Transformations - File Exchange - MATLAB Central (mathworks.com)

Generate maximally perceptually-distinct colors - File Exchange - MATLAB Central (mathworks.com)

clc
% load('testdata.mat')
%% define your custom color order
% option 1 : manually : possible but takes time
% colors = [0 0 1;...
%           0 1 0;...
%           1 0 0;...
%           0 1 1;...
%           1 0 1;...
%           1 0.69 0.39;...
%           0.6 0.2 0;...
%           0 0.75 0.75;...
%           0.22 0.44 0.34;...
%           0.32 0.19 0.19]; %10x3 RGB array
% % or based on existing color maps 
% colors = jet(60);
% or this 
% % https://fr.mathworks.com/matlabcentral/fileexchange/42673-beautiful-and-distinguishable-line-colors-colormap
% colors = linspecer(60);
% even better : 
func = @(x) colorspace('RGB->Lab',x); % https://fr.mathworks.com/matlabcentral/fileexchange/28790-colorspace-transformations
colors = distinguishable_colors(60,{'w','k'},func); % https://fr.mathworks.com/matlabcentral/fileexchange/29702-generate-maximally-perceptually-distinct-colors
%% define line styles and loop over them 
linS = {'-','--',':','-.'};
figure(1),
hold on
c = 0;
cc = c;
for kk = 1:10:600
    c= c+1;
    cc = cc+1;
    if cc>length(linS)
        cc = 1 ; % restart from 1
    end
%     plot(Inv_Q(:,kk),VD,'Color',colors(n,:), 'DisplayName',sprintf('f = %d',f(kk)))
     plot(VD1 + 0.1*kk,VD1,'Color',colors(c,:),'linestyle',linS{cc}, 'DisplayName',sprintf('f = %d',kk))
%     plot(qp(:,kk),VD1,'Color',colors(c,:),'linestyle',linS{cc}, 'DisplayName',sprintf('f = %d',kk))
end
hold off
grid
legend('Location','best'); set(gca, 'ydir', 'reverse'); 
% xlim([0 3.0e-2]); ylim([1.8879e+03 2.1313e+03]);
xlabel('qp'); ylabel('VD');

Nisar Ahmed 2022-6-1

testdata.mat

Here is the data in which qp or Inv Q is a 2D matrix.

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Answer 1

Hiro Yoshino 2022-6-1

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Solution 1:

You can control the order of color by using colororder.

Also, you can specify the line markers by like this.

Solution 2:

How about re-sampling the VD with interp1 so you can have the identical length for that vector?

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Nisar Ahmed 2022-6-1

Thank you for the comments,

In the figure code, it is loop here so how to specify the colororder or markers is not working

figure(1),

hold on

for kk = 1:10:600

plot(Inv_Q(:,kk),VD, 'DisplayName',sprintf('f = %d',f(kk)))

end

hold off

grid

legend('Location','best'); set(gca, 'ydir', 'reverse');

xlim([0 3.0e-2]); ylim([1.8879e+03 2.1313e+03]);

xlabel('qp'); ylabel('VD');

2) I do not need to interploate, istead I need to add pad above and below until both matrices become equal.

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Answer 2

Mathieu NOE 2022-6-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1731595-how-to-add-a-verteical-pad-obove-and-below-the-curve-and-graph-style-and-color-displays#answer_977425

在 MATLAB Online 中打开

hello Nisar

this is my suggestion , and result

your last mat file does not contain the f data so I skipped that portion of code for the time being - should be fairly easy to reactivate it on your side

here a demo with a spacing of 5 netween succesive data (your original code was with a spacing of 10)

clc
load('testdata.mat')
[m,n] = size(Inv_Q);
%% define your custom color order
% option 1 : manually : possible but takes time and not flexible / robust
% colors = [0 0 1;...
%           0 1 0;...
%           1 0 0;...
%           0 1 1;...
%           1 0 1;...
%           1 0.69 0.39;...
%           0.6 0.2 0;...
%           0 0.75 0.75;...
%           0.22 0.44 0.34;...
%           0.32 0.19 0.19]; %10x3 RGB array
% % or based on existing color maps 
% colors = jet(n);
% or this 
% % https://fr.mathworks.com/matlabcentral/fileexchange/42673-beautiful-and-distinguishable-line-colors-colormap
% colors = linspecer(60);
% even better : 
func = @(x) colorspace('RGB->Lab',x); % https://fr.mathworks.com/matlabcentral/fileexchange/28790-colorspace-transformations
colors = distinguishable_colors(n,{'w','k'},func); % https://fr.mathworks.com/matlabcentral/fileexchange/29702-generate-maximally-perceptually-distinct-colors
%% define line styles and loop over them 
linS = {'-','--',':','-.'};
figure(1),
hold on
c = 0;
cc = c;
new_x = linspace(min(VD1),max(VD1),m);
for kk = 1:5:n
    c= c+1;
    cc = cc+1;
    if cc>length(linS)
        cc = 1 ; % restart from 1
    end
     plot(Inv_Q(:,kk),new_x,'Color',colors(c,:),'linestyle',linS{cc}); %      plot(Inv_Q(:,kk),VD1, 'DisplayName',sprintf('f = %d',f(kk)))
     leg_str{c} = (['Data ' num2str(kk)]);
end
hold off
grid
legend(leg_str,'Location','best'); set(gca, 'ydir', 'reverse'); 
xlim([0 3.0e-2]); ylim([1.8879e+03 2.1313e+03]);
xlabel('qp'); ylabel('VD');

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