Display Data with Multiple Scales and Axes Limits - MATLAB & Simulink - MathWorks Deutschland (2024)

Display Data with Two y-Axes

Use the yyaxis function to create a plot with two y-axes. For example, you can use two y-axes to plot two lines on different scales.

Create an axes object, and activate the left y-axis by calling yyaxis left. Then plot a sine wave.

figureyyaxis leftx = linspace(0,10);y = sin(3*x);plot(x,y)

Activate the right y-axis by calling yyaxis right. Then plot an amplified sine wave.

yyaxis righty2 = sin(3*x).*exp(0.5*x);plot(x,y2)

Display Data with Multiple x-Axes and y-Axes

Since R2019b

To plot two sets of data with separate x- and y-axes, create two separate axes objects in a tiled chart layout. Within one of the axes objects, move the x-axis to the top of the plot box, and move the y-axis to the right side of the plot box.

For example, you can create two plots that have different x- and y-axis limits.

First, create two sets of x- and y-coordinates.

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

Create a tiled chart layout and an axes object. Then plot into the axes:

t = tiledlayout(1,1);ax1 = axes(t);plot(ax1,x1,y1,'-r')ax1.XColor = 'r';ax1.YColor = 'r';

Create a second axes object and plot the second set of data in black rather than red. Then, set properties on the second axes object to move the x-axis and y-axis, and to ensure that neither plot obscures the other.

ax2 = axes(t);plot(ax2,x2,y2,'-k')ax2.XAxisLocation = 'top';ax2.YAxisLocation = 'right';ax2.Color = 'none';ax1.Box = 'off';ax2.Box = 'off';

Plot Data on Discontinuous x-Axis

Since R2019b

You can use a tiled chart layout to give the appearance of a plot that is broken into intervals along one axis. For example, you might want to exclude one section of the x-axis to focus on other regions of interest.

Create coordinate vectors x and y.

x = 0:0.1:60;y = 4.*cos(x)./(x+2);

Create a tiled chart layout containing two tiles, and place an axes object across both tiles. In the final presentation, this axes object will appear in the background, behind two other axes objects. A section of its x-axis will be visible to give the appearance of one long x-axis.

figuret = tiledlayout(1,2,'TileSpacing','compact');bgAx = axes(t,'XTick',[],'YTick',[],'Box','off');bgAx.Layout.TileSpan = [1 2];

Create an axes object in front of bgAx in the first tile. Plot x and y, and set the x-axis limits to the first interval:

ax1 = axes(t);plot(ax1,x,y)xline(ax1,15,':');ax1.Box = 'off';xlim(ax1,[0 15])xlabel(ax1, 'First Interval')

Repeat the process to create another axes object and plot for the second interval. The axes appears in the first tile by default. Move it to the second tile by setting the Layout.Tile property of the axes to 2. Then, link the axes so that the limits of both y-axes match.

% Create second plotax2 = axes(t);ax2.Layout.Tile = 2;plot(ax2,x,y)xline(ax2,45,':');ax2.YAxis.Visible = 'off';ax2.Box = 'off';xlim(ax2,[45 60])xlabel(ax2,'Second Interval')% Link the axeslinkaxes([ax1 ax2], 'y')

To add a title, pass the tiled chart layout to the title function.

title(t,'Attenuated Cosine Function')

Display Two Sets of Data with Separate Colorbars

Since R2020b

An axes object can accommodate only one colorbar. To create a visualization with multiple colorbars, stack multiple axes objects in a tiled chart layout. Make only one of the axes visible, but display a colorbar next to each of them in an outer tile of the layout.

Create the coordinate vectors, size data, and color data for two bubble charts.

x = 1:15;n = 70 * randn(1,15) + 50;y1 = n + x.^2; y2 = n - linspace(1,225,15);sz1 = rand(1,15);sz2 = rand(1,15);c = linspace(1,10,15);

Stack two axes objects, each containing a bubble chart, in a tiled chart layout.

% create first bubble chart with winter colormapt = tiledlayout(1,1);ax1 = axes(t); bubblechart(ax1,x,y1,sz1,c)colormap(ax1,'winter')% create second bubble chart with autumn colormapax2 = axes(t);bubblechart(ax2,x,y2,sz2,c)colormap(ax2,'autumn')ax2.Visible = 'off';% link the limits of axeslinkaxes(t.Children)

Display a colorbar with a label for each axes object in the east tile of the layout. The layout arranges the colorbars and keeps them aligned.

cb1 = colorbar(ax1);cb1.Layout.Tile = 'east';cb1.Label.String = 'Time (s)';cb2 = colorbar(ax2);cb2.Layout.Tile = 'east';cb2.Label.String = 'Concentration (M)';