Formerly, the command
created a LineStyle with prominent dots as markers, connected by lines. In 2011b (on a Mac), there are no dots. I have to increase the MarkerSize property of the line to get the dots to show.
Bug, or feature? I didn't find mention of this change in the Release Notes.
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I ultimately contacted MathWorks support for this question, and found the definitive answer.
It turns out that for my high-resolution monitor, the "ScreenPixelsPerInch" had a default value of 72, which was causing the plot symbols to be rendered in a way that they did not show up on the screen. The dots "existed", but were not rendered visibly on the monitor. (They did show up in the saved/printed output.)
I was able to fix the issue by slightly increasing the value of ScreenPixelsPerInch:
I put that line in my startup.m file, and all is well.
I am not sure for older versions. You still can use this format for line and marker in plots.
plot(1:10,'.-') % is straight line plot(1:10,'.--')% is ------ kind of line plot(1:10,'.-.')% is o-.-o, where o is your data point.
I hope, I understood your point well :-)