CODEWITHSUNDEEP
matlabplot
Gustaf
Gustaf

Reputation: 13

MATLAB: How to create double axis for one graph

I am trying to create a plot of failure strength vs material stiffness. However, the stiffness can be given as either [Pascal] or [Shore A] - I would like to use both in a double axis plot.

I've tried using plotyy but it will not allow me to have one line plot, nor does it allow the non-linear relation between Pascal and Shore A. I would like to plot one of them and then manually add the spacing between the others ticks.

Preferably I would like the stiffness on the x-axis, but y-axis can do if it is easier.

Any help is most welcome!

Example picture of what I'm trying to do

Upvotes: 0

Views: 367

Answers (1)

Mahesh Kumar Kodanda
Mahesh Kumar Kodanda

Reputation: 291

This may help you when you need double x-axes and double y-axes plot, but if you need single y-axes and two x-axes you can modify accordingly:

This example shows how to create a graph using the bottom and left sides of the axes for the first plot, and the top and right sides of the axes for the second plot.

Create the data to plot.

x1 = 0:0.1:40;
y1 = 4.*cos(x1)./(x1+2);
x2 = 1:0.2:20;
y2 = x2.^2./x2.^3;

Use the line function to plot y1 versus x1 using a red line. Set the color for the x-axis and y-axis to red.

Note: Starting in R2014b, you can use dot notation to set properties. If you are using an earlier release, use the set function instead, such as set(ax1,'XColor','r').

figure
line(x1,y1,'Color','r')
ax1 = gca; % current axes
ax1.XColor = 'r';
ax1.YColor = 'r';

Create a second axes in the same location as the first axes by setting the position of the second axes equal to the position of the first axes. Specify the location of the x-axis as the top of the graph and the y-axis as the right side of the graph. Set the axes Color to 'none' so that the first axes is visible underneath the second axes.

ax1_pos = ax1.Position; % position of first axes
ax2 = axes('Position',ax1_pos,...
'XAxisLocation','top',...
'YAxisLocation','right',...
'Color','none');

Use the line function to plot y2 versus x2 on the second axes. Set the line color to black so that it matches the color of the corresponding x-axis and y-axis.

line(x2,y2,'Parent',ax2,'Color','k')

The graph contains two lines that correspond to different axes. The red line corresponds to the red axes. The black line corresponds to the black axes.

Source:

http://www.mathworks.com/help/matlab/creating_plots/graph-with-multiple-x-axes-and-y-axes.html

Upvotes: 3

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