Adding a secondary x axis on the top of a line plot

Question

SKP 2021-9-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1457404-adding-a-secondary-x-axis-on-the-top-of-a-line-plot

评论： SKP 2021-9-24

In the line plot obtained after running the code appended below, xticks are to be added at the top such that their value is 50 times the xticks at the bottom of the plot. Moreover, an xlabel needs to be at the top also. Could someone help me with the code.

I had tried to implement some suggestions in previous posts on the topic, but somehow I get misaligned and overlapping axes. Thanks in advance.

x = 15:15:1800;

y1 = x./(1-x);

y2 = exp(-x./(1+x));

figure;

tiledlayout(1,1);

nexttile;

yyaxis left; plot(x/360,y1,'-bo'); hold on;

ylabel('PCC'); xlabel('time (days)');

yyaxis right; plot(x/360,y2,'-xr'); % hold on;

ylabel('DPCC (mm)'); % xlabel('time (days)');

axis square;

legend('PCC','DPCC','Location','East');

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

Prachi Kulkarni 2021-9-24

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1457404-adding-a-secondary-x-axis-on-the-top-of-a-line-plot#answer_794124

Hi,

Following is a modified version of your code which will give you the secondary X axis at the top of the plot with an xlabel as required.

x1 = 15:15:1800;
y1 = x1./(1-x1);
y2 = exp(-x1./(1+x1));
x2 = 50*x1;
t = tiledlayout(1,1);
ax1 = axes(t);
l1 = plot(ax1,x1,y1,'-bo');
ax1.Color = 'none';
xlabel('time (days)'); ylabel('PCC');
axis square
ax2 = axes(t);
l2 = plot(ax2,x2,y2,'-xr');
ax2.XAxisLocation = 'top';
ax2.YAxisLocation = 'right';
ax2.Color = 'none';
xlabel('Label for top X axis'); ylabel('DPCC (mm)');
axis square
legend([l1;l2],'PCC','DPCC','Location','East');
ax1.Box = 'off';
ax2.Box = 'off';