This example shows how to combine plots in the same axes using the hold
function, and how to create multiple axes in a figure using the tiledlayout
function. The tiledlayout
function is available starting in R2019b. If you are using an earlier release, use the subplot
function instead.
By default, new plots clear existing plots and reset axes properties, such as the title. However, you can use the hold on
command to combine multiple plots in the same axes. For example, plot two lines and a scatter plot. Then reset the hold state to off.
x = linspace(0,10,50); y1 = sin (x); plot(x,y1) title('Combine Plots') hold on y2 = sin (x / 2); plot(x,y2) y3 = 2 * sin (x); scatter(x,y3) hold off
When the hold state is on, new plots do not clear existing plots or reset axes properties, such as the title or axis labels. The plots cycle through colors and line styles based on the ColorOrder
and LineStyleOrder
properties of the axes. The axes limits and tick values might adjust to accommodate new data.
You can display multiple axes in a single figure by using the tiledlayout
function. This function creates a tiled chart layout containing an invisible grid of tiles over the entire figure. Each tile can contain an axes for displaying a plot. After creating a layout, call the nexttile
function to place an axes object into the layout. Then call a plotting function to plot into the axes. For example, create two plots in a 2-by-1 layout. Add a title to each plot.
Note: This code uses the tiledlayout
function, which is available starting in R2019b. If you are using an earlier release, use the subplot
function instead.
x = linspace(0,10,50); y1 = sin (x); y2 = rand(50,1); tiledlayout(2,1) % Requires R2019b or later % Top plot nexttile plot(x,y1) title('Plot 1') % Bottom plot nexttile scatter(x,y2) title('Plot 2')
To create a plot that spans multiple rows or columns, specify the span
argument when you call nexttile
. For example, create a 2-by-2 layout. Plot into the first two tiles. Then create a plot that spans one row and two columns.
x = linspace(0,10,50); y1 = sin (x); y2 = rand(50,1); % Top two plots tiledlayout(2,2) % Requires R2019b or later nexttile plot(x,y1) nexttile scatter(x,y2) % Plot that spans nexttile([1 2]) y2 = rand(50,1); plot(x,y2)
Modify the axes appearance by setting properties on each of the axes objects. You can get the axes object by calling the nexttile
function with an output argument. You also can specify the axes object as the first input argument to a graphics function to ensure that the function targets the correct axes.
For example, create two plots and assign the axes objects to the variables ax1
and ax2
. Change the axes font size and x-axis color for the first plot. Add grid lines to the second plot.
x = linspace(0,10,50); y1 = sin (x); y2 = rand(50,1); tiledlayout(2,1) % Requires R2019b or later % Top plot ax1 = nexttile; plot(ax1,x,y1) title(ax1,'Plot 1') ax1.FontSize = 14; ax1.XColor = 'red'; % Bottom plot ax2 = nexttile; scatter(ax2,x,y2) title(ax2,'Plot 2') grid(ax2,'on')
You can control the spacing around the tiles in a layout by specifying the Padding
and TileSpacing
properties. For example, display four plots in a 2-by-2 layout.
x = linspace(0,30); y1 = sin (x); y2 = sin (x / 2); y3 = sin (x / 3); y4 = sin (x / 4); % Create plots t = tiledlayout(2,2); % Requires R2019b or later nexttile plot(x,y1) nexttile plot(x,y2) nexttile plot(x,y3) nexttile plot(x,y4)
Minimize the spacing around the perimeter of the layout and around each tile by setting the Padding
and TileSpacing
properties to 'none'
.
t.Padding = 'none'; t.TileSpacing = 'none';
You can display a shared title and shared axis labels in a layout. Create a 2-by-1 layout t
. Then display a line plot and a stem plot. Synchronize the x-axis limits by calling the linkaxes
function.
x1 = linspace(0,20,100); y1 = sin(x1); x2 = 3:17; y2 = rand(1,15); % Create plots. t = tiledlayout(2,1); % Requires R2019b or later ax1 = nexttile; plot(ax1,x1,y1) ax2 = nexttile; stem(ax2,x2,y2) % Link the axes linkaxes([ax1,ax2],'x');
Add a shared title and shared axis labels by passing t
to the title
, xlabel
, and ylabel
functions. Move the plots closer together by removing the x-axis tick labels from the top plot and setting the TileSpacing
property of t
to 'compact'
.
% Add shared title and axis labels title(t,'My Title') xlabel(t,'x-values') ylabel(t,'y-values') % Move plots closer together xticklabels(ax1,{}) t.TileSpacing = 'compact';
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