How to combine two plots into one

Question

SS 2019-8-24

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/477424-how-to-combine-two-plots-into-one

评论： Star Strider 2019-8-26

I am using MATLAB R2018 b. I have two plots with same x but, the limits of y axes are different. Both plots has a line and some data points (different color of the line and shape of the markers). These two plots are output from two different scripts. I want to combine these two plots to compare my results.

I am unable to use the dock figure option which was suggested for one such similar questions in the community.

Any help would be appreciated.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Star Strider 2019-8-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/477424-how-to-combine-two-plots-into-one#answer_388879

Plot both data series on the same axes either in the same plot call, or use the hold function with two plot calls.

14 个评论
显示 12更早的评论隐藏 12更早的评论

Star Strider 2019-8-24

在 MATLAB Online 中打开

It is straightforward to recover the data from .fig files.

Here is some code I wrote for a similar problem:

I = openfig('YourFigure.fig');
Ax = gca;
lgnd = Ax.Legend;
Lines = findobj(Ax,'Type','line');
for k1 = 1:fix(numel(Lines)/6)                              % Consider 6 ‘Lines’ In Each Iteration
    for k2 = 1:6
        X(k2,:) = Lines(k2+(k1-1)*6).XData;                 % Get ‘X’ Values For This Set
        Y(k2,:) = Lines(k2+(k1-1)*6).YData;                 % Get ‘Y’ Values For This Set
    end
    Xm(k1,:) = X(1,:);                                      % X-Vector (For Plot)
    Ym(k1,:) = mean(Y);                                     % Y-Vector (For Plot) - Uses ‘mean’, ‘median’ Or Others May Be Appropriate As Well
end
figure
semilogy(Xm', Ym')
grid
legend(Ax.Legend.String)
xlabel(Ax.XLabel.String)
ylabel(Ax.YLabel.String)

Do that for each of your .fig files, save the ‘X’ and ‘Y’ arrays separately for each file (name them ‘X1‘, ‘Y1’ and ‘X2’, ‘Y2’ for each figure as appropriate, since you only have two figures), then analyse the ‘X’ and ‘Y’ data as you wish. You can then plot them together as well, as the figure call in my code illustrates.

Even though I do not have your .fig files, this code should be robust enough to work with them.

Consider using the save function to save the data your recover from your .fig files in a .mat file so you will not have to extract the data from them again if you want to do more analyses with them. You can then use the load funciton to load them back into your workspace.

Star Strider 2019-8-24

在 MATLAB Online 中打开

It took a few minutes to adapt my previous code to your figures.

Try this:

fignames = {'Track_50_PDF_Ux.fig'; 'Track_100_PDF_Ux.fig'};
for k2 = 1:numel(fignames)
    SSF = openfig(fignames{k2});
    Ax = gca;
    Lines = findobj(Ax,'Type','line');
    for k1 = 1:numel(Lines)
        X{k2,:}(k1,:) = Lines(k1).XData;                        % Get ‘X’ Values For This Set
        Y{k2,:}(k1,:) = Lines(k1).YData;                        % Get ‘Y’ Values For This Set
    end
    figure
    plot(X{k2}(1,:), Y{k2}(1,:),'p',    X{k2}(2,:), Y{k2}(2,:),'-')
    grid
    xlabel(Ax.XLabel.String)
    ylabel(Ax.YLabel.String)
end

The ‘X’ and ‘Y’ cell arrays contain the information you want. The data for the first plot are in ‘X{1}’ and ‘Y{1}’, and ‘X{2}’ and ‘Y{2}’ for the second plot. (You can similarly save the x-label strings and y-label strings if you want to. I demonstrate how to get them in the plot calls.) See the documentation on Access Data in Cell Array for details on how to work with cell arrays if you are not familiar with them.

Star Strider 2019-8-24

在 MATLAB Online 中打开

Add this after my previous code:

figure
hold all
for k = 1:numel(X)
    plot(X{k}(1,:), Y{k}(1,:),'p',    X{k}(2,:), Y{k}(2,:),'-')
end
hold off
title('Combined Data')
xlabel(Ax.XLabel.String)
ylabel(Ax.YLabel.String)

The complete code is now:

fignames = {'Track_50_PDF_Ux.fig'; 'Track_100_PDF_Ux.fig'};
for k2 = 1:numel(fignames)
    SSF = openfig(fignames{k2});
    Ax = gca;
    Lines = findobj(Ax,'Type','line');
    for k1 = 1:numel(Lines)
        X{k2,:}(k1,:) = Lines(k1).XData;                        % Get ‘X’ Values For This Set
        Y{k2,:}(k1,:) = Lines(k1).YData;                        % Get ‘Y’ Values For This Set
    end
    figure
    plot(X{k2}(1,:), Y{k2}(1,:),'p',    X{k2}(2,:), Y{k2}(2,:),'-')
    grid
    xlabel(Ax.XLabel.String)
    ylabel(Ax.YLabel.String)
end
figure
hold all
for k = 1:numel(X)
    lgndstr{k,1} = sprintf('Figure %d Data',k);
    lgndstr{k,2} = sprintf('Figure %d Line',k);
    plot(X{k}(1,:), Y{k}(1,:),'p',    X{k}(2,:), Y{k}(2,:),'-')
end
hold off
title('Combined Data')
xlabel(Ax.XLabel.String)
ylabel(Ax.YLabel.String)
legend(lgndstr{1,:}, lgndstr{2,:})

producing this plot:

That should do what you want.

SS 2019-8-26

Thanks.

Star Strider 2019-8-26

As always, my pleasure.

请先登录，再进行评论。

How to combine two plots into one

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

14 个评论
显示 12更早的评论隐藏 12更早的评论

更多回答（0 个）

另请参阅

类别

标签

Community Treasure Hunt

How to combine two plots into one

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

14 个评论 显示 12更早的评论隐藏 12更早的评论

更多回答（0 个）

另请参阅

类别

标签

Community Treasure Hunt

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

14 个评论
显示 12更早的评论隐藏 12更早的评论