Create chart with two y-axes (2024)

Create axes with a y-axis on both the left and right sides. Plot a set of data against the left y-axis. Then, use yyaxis right to activate the right side so that subsequent graphics functions target it. Plot a second set of data against the right y-axis and set the limits for the right y-axis.

x = linspace(0,10);y = sin(3*x);yyaxis leftplot(x,y)z = sin(3*x).*exp(0.5*x);yyaxis rightplot(x,z)ylim([-150 150])

Create a chart with two y-axes and add a title and axis labels to each side.

Load the matrix hwydata from the example file accidents.mat. Create a scatter plot of the fifth column in hwydata against the left y-axis. Add a title and axis labels.

load('accidents.mat','hwydata')ind = 1:51;drivers = hwydata(:,5);yyaxis leftscatter(ind,drivers)title('Highway Data')xlabel('States')ylabel('Licensed Drivers (thousands)')

Create a second scatter plot of the seventh column in hwydata against the right y-axis. Then, label the right y-axis.

pop = hwydata(:,7);yyaxis rightscatter(ind,pop)ylabel('Vehicle Miles Traveled (millions)')

Specify the color scheme for each side of the axes by setting the color order to the two colors that you want to use. Starting in R2019b, you can use the colororder function to set the color order. Then, plot two lines against the left y-axis and two lines against the right y-axis. Add a legend.

colororder({'b','m'})yyaxis lefty = [1 2; 3 4];plot(y)yyaxis rightz = [4 3; 2 1];plot(z)legend

Control individual plot colors by setting the color order for each side of the axes.

Plot three bar charts against the left side. Use a different color for each bar series by setting the color order for the left side to the default color order.

yyaxis leftbar(magic(3));colororder('default')

Plot three scatter plots against the right side. Use a different color for each scatter plot by setting the color order to an array of color names. Alternatively, you can specify the colors using a matrix of RBG triplets. Then add a legend.

yyaxis rightscatter([1 2 3],[2 5 2],'filled')hold onscatter([1 2 3],[3 4 1],'filled')scatter([1 2 3],[4 2 4],'filled')hold offcolororder({'r','b','c'})legend

Starting in R2019b, you can display a tiling of plots using the tiledlayout and nexttile functions. Call the tiledlayout function to create a 2-by-1 tiled chart layout. Call the nexttile function to create the axes objects ax1 and ax2. Add a second y-axis to the top axes by specifying ax1 as the first input to yyaxis. If you do not specify the axes, then yyaxis adds a second y-axis to the current axes.

x = linspace(1,10);tiledlayout(2,1)% Top plotax1 = nexttile;yyaxis(ax1,'left')plot(ax1,x,sin(x))yyaxis(ax1,'right')plot(ax1,x,exp(x))% Bottom plotax2 = nexttile;plot(ax2,1:10)