yyaxis limit for lines in one graph

Hello,

I would like to ask you about the limitations of yyaxis plots in a single plot. I've noticed that if the number of lines is greater than four, the last line is plotted extremely bold, regardless of the settings. I am using MATLAB R2023b.

I've included an example below for testing.

x = -pi:0.01:pi;

figure(1)
lineColor = turbo(5);

for iSin = 1:5
	yyaxis left
	plot(x, sin(iSin * x), 'LineStyle', '--', 'LineWidth', 1.5, 'Color', lineColor(iSin, :))
	hold on
end

The picture with 5 elements:

The picture with 4 elements:

Is this a bug or some limitations of yyaxis command?

Thanks in advance.

Best regards,

Filip Lekes.

Answer 1

[Star Strider]

I doubt that it is a limitation, simply yyaxis doing its best to make the lines distinct. You can specify them yourself with the LineSpec options (although it would likely be best to not specify the colours, and let yyaxis define that).

[Filip Lekes]

If you would like to plot multiple lines using yyaxis, is there no option to manage the colors?

Is there a workaround or a different command to plot multiple plots with two y-axes?

Thanks.

[Star Strider]

You can certainly define the colours yourself. It would be best to also use the DisplayName option and legend in that instance.

The yyaxis function chooses the colours so that associating the curves with the appropriate y-axis is more straightforward.

[Filip Lekes]

I've just tried this approach with LineSpec and works as I would expected.

plot(x, sin(iSin * x), '--', 'LineWidth', 1.5, 'Color', lineColor(iSin, :))

It's funny that without 'LineStyle' it's working.

Thanks a lot for support.

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it!

.

Answer 2

[Adam Danz]

Specify Line Style and Color in axes properties instead of in plot(__)

Starting in R2023a, you can set the line style and line colors in axes properties and you can control how the axes cycles through those line and color properties as new objects are added to the axes.

The following block uses these axes properties to control the color and style of the lines.

• LineStyleOrder
• ColorOrder
• LineStyleCyclingMethod

x = -pi:0.01:pi;
figure(1)
yyaxis left
ax = gca(); 
ax.ColorOrder = turbo(5);
ax.LineStyleOrder = '--'; 
ax.LineStyleCyclingMethod  = 'withcolor'; % cycle through linestyle and color together
hold on

for iSin = 1:5
	plot(x, sin(iSin * x), 'LineWidth', 1.5)
end