Plot shows markers, but no lines, no matter what is being plotted

Title says it all. Even for extremely simple plots copied from the official documentation, such as

x = linspace(0,10,100);

y = exp(x/10).*sin(4*x);

plot(x,y,'-o')

I get a plot which has markers but just a few whispy segments of line (see attached). I'm using 2023a in browser at https://matlab.mathworks.com/.

Edit for clarity: According to official documentation, the code above should produce a plot with lines connecting the markers. The problem is that, when I run this code, is does not do so. It has only markers, for reasons mysterious to me.

Edit for clarity: I am running this in-browser at https://matlab.mathworks.com/, using all default settings and after clearing local variables.

Answer 1

[Sulaymon Eshkabilov]

Here is the corrected code:

x = linspace(0,10,100);
y = exp(x/10).*sin(4*x);
scatter(x,y)

% In case, you want with lines:
x = linspace(0,10,100);
y = exp(x/10).*sin(4*x);
figure
plot(x,y, 'bo-', 'linewidth', 2)

[Mathew]

I'm not sure in what sense that first plot is "correct code" since the problem here is that I don't have lines, but want lines, in my plot. Either way, the code you shared does not fix the issue I described in my original post. When I run it in browser, I get the attached image.

Answer 2

[Star Strider]

The code is also being run in R2023a, since that just released. If you are using the pre-release version, consider downloading the official release (you’ll want to do that anyway), and see if the problem persists.

Otherwise, you could be encountering a graphics rendering problem. See Resolving Low-Level Graphics Issues for details. Specifically, be sure that you’re using the latest graphics drivers.

[Mathew]

> If you are using the pre-release version, consider downloading the official release

> Specifically, be sure that you’re using the latest graphics drivers.

I don't think either of these apply, as I haven't downloaded anything and am not using my own graphics drivers. I am running this in browser at https://matlab.mathworks.com/, using all default setting.

[Star Strider]

O.K., so you are doing this on your personal computer however using MATLAB Online.

Running your code here (I didn’t separately test it in MATLAB Online) —

x = linspace(0,10,100);
y = exp(x/10).*sin(4*x);
plot(x,y,'-o')

On my computer,. everything appears to be working correctly and all the llines and markers appear. That you are getting a different result implies to me that this could still be a graphics driver problem on your computer, since your computer has to render the plot. Alternatively, it could possibly be a browser problem, so it could be worthwhile to run your code with a different browser to see if there’s a difference. That could also help differentiate between a browser problem and a graphics driver problem.

I’m just formulating hypotheses here that you can test to see if it’s possible to identify the problem. That’s essentially all that I can do.

.