Plotting multiple y axes on one side only using addaxis
显示 更早的评论
Hi,
I am using addaxis to plot multiple y axes (first pic), but is there a way to have them all appear on one side (say the right hand side). Is there a better function to do this than addaxis?
If I do this:
figure
plot(x1,y1);
addaxis(x2,y2);
set(gca,'yaxislocation','right');
I get the axes on top of each other.
Thanks
采纳的回答
I briefly looked at the addaxis function on the file exchange and I'm not sure it's using the best approach.
Follow this demo below to produce the figure at the bottom. I suggest stepping through the code line by line and reading the comments so you can understand what each line is doing. The order of what's happening is important. If some of the axis alterations are made before plotting the data, the alterations will not be implemented correctly.
The most important part is scaling the axis ticks from the 2nd axis so they align with the axis ticks of the 1st axes. Otherwise you'll have different sets of tick locations which makes the plot very difficult to read.
% Create two identical overlaying axes
fig = figure();
ax1 = axes();
ax2 = copyobj(ax1, fig);
% Link the x axes
linkaxes([ax1,ax2],'x')
% Choose colors for the 2 y axes.
axColors = [
0 0.39063 0; % dark green
0.53906 0.16797 0.88281]; % blue violet
% Do plotting (we'll adjust the axes and the ticks later)
plot(ax1, 1:100, sort(randn(1,100)*100), '-', 'Color', axColors(1,:));
plot(ax2, 1:100, sort(randn(1,100)*60), '-', 'Color', axColors(2,:));
% Set axes background color to transparent and turns box on
set([ax1,ax2],'Color', 'None', 'Box', 'on')
% Set y-ax to right side
set([ax1,ax2], 'YAxisLocation', 'right')
% make the axes 10% more narrow
set([ax1,ax2], 'Position', ax1.Position .* [1 1 .90 1])
% set the y-axis colors
ax1.YAxis.Color = axColors(1,:);
ax2.YAxis.Color = axColors(2,:);
% After plotting set the axis limits.
ylim(ax1, ylim(ax1));
ylim(ax2, ylim(ax2));
% Set the y-ticks of ax1 so they align with yticks of ax2
% This also rounds the ax1 ticks to the nearest tenth.
ax1.YTick = round(linspace(min(ax1.YTick),max(ax1.YTick),numel(ax2.YTick)),1);
% Extend the ax1 y-ax ticklabels rightward a bit by adding space
% to the left of the label. YTick should be set first.
ax1.YTickLabel = strcat({' '},ax1.YTickLabel);
% Set y-ax labels and adjust their position (5% inward)
ylabel(ax1,'y axis 1')
ylabel(ax2','y axis 2')
ax1.YLabel.Position(1) = ax1.YLabel.Position(1) - (ax1.YLabel.Position(1)*.05);
ax2.YLabel.Position(1) = ax2.YLabel.Position(1) - (ax2.YLabel.Position(1)*.05);
5 个评论
Peter Sakkos
2020-12-16
Do you know how to do this instead with multiple x-axes?
Adam Danz
2020-12-16
Peter Sakkos
2020-12-17
编辑：Peter Sakkos
2020-12-17
Okay, as of now, am having a series of issues:
I am trying to plot two sets of data (1 is in terms of acceleration and the other is in terms of velocity) w/ respect to a single y axis that is in terms of altitude.
1) When I add my axes, they overlap each other. I don't really know how to space out the x axes ticks and labels without having them cutoff from view.
2) I only want to show 1 set of y axis values, but it appears that two values are being plotted. How would I remove one of them?
3) For some reason, when I resize the graph, the two seperate axis plots are not in alighment (they are aligned when the graph is initially created). What can I do to keep the graphs aligned?
Here is my plot, for reference.
I want something that looks similar to the very first plot posted at the following link.
https://www.mathworks.com/matlabcentral/answers/571378-multiple-x-axis-in-different-scale-but-one-y-axis#answer_471847
Peter Sakkos
2020-12-17
Here is the code I use, where vel, acc, and altitude are arrays of data not shown here.
figure(2)
vel = v_entry.*exp(-1/(2*zeta).*exp(-bz));
plot(vel, altitude/1000, 'LineWidth', 4, 'Color', [0.2, 0.6470, 0.810]);
set(gca, "FontName","Comic Sans MS", "FontSize", 16);
ylabel("Altitude (km)"); xlabel('Velocity (m/s)');
yticks(0:5:55); ylim([0 55]); xticks(0:v_entry/6:v_entry); xlim([0 v_entry]);
ax1 = gca;
hold on
ax1_pos = ax1.Position;
ax2 = axes('Position',ax1_pos,...
'XAxisLocation','bottom',...
'Color','none')
hold(ax2,'on')
set(ax2,'YTick',([]));
plot(ax2, acc, altitude./1000,'LineWidth', 4, 'Color', [0.6, 0.4470, 0.7410]);
yticks(0:5:55); ylim([0 55]); xticks(0:450/6:450); xlim([0 450]);
set(gca, "FontName","Comic Sans MS", "FontSize", 16);
title("Altitude vs Hypersonic Re-Entry Velocity");
xlabel("Acceleration Normalized with Gravity (g)");
Adam Danz
2020-12-17
I suggest starting a new question since this is off topic from the original question in this thread.
更多回答（1 个）
Tommy
2020-5-1
It looks like that function flips back and forth between adding the new axes to the left and adding them to the right. How about calling the function three times and deleting the second set of axes after the third has been added?
plot(1:10, rand(10,1));
addaxis(NaN,NaN);
addaxis(1:10, rand(10,1));
axh = getaddaxisdata(gca,'axisdata');
delete(axh{1})
4 个评论
Dirk
2020-5-1
Tommy
2020-5-1
Happy to help!
Try this:
plot(NaN,NaN);
set(gca, 'YColor', 'none');
addaxis(1:10, rand(10,1));
addaxis(NaN,NaN);
addaxis(1:10, rand(10,1));
axh = getaddaxisdata(gca,'axisdata');
delete(axh{2})
Dirk
2020-5-4
Tommy
2020-5-4
You're welcome. I completely agree with Adam's advice.
类别
在 帮助中心 和 File Exchange 中查找有关 Graphics Performance 的更多信息
Translated by 
