Export figure as EPS or PDF does not properly render some dotted lines; they become solid lines

When exporting a figure containing three plots to EPS or PDF format, the line styles on the third plot only do not render properly. The dotted lines become solid (see first image).

When exporting to a raster format, there is no distortion (see second image).

Does anyone know a fix for this? I much prefer a vector format. It seems weird that the first two plots look fine.

Answer 1

[Thomas Lindvall]

export_fig solved the problem for me:

https://se.mathworks.com/matlabcentral/fileexchange/23629-export_fig

[Shyamprasad Natarajan Raja]

I had to create a PDF file from a figure with many data points. Plotting worked fine on matlab, but using exportgraphics() took a terribly long time. export_fig was almost instantaneous and produced the expected output. Great recommendation!

Answer 2

[Georges Chahine]

I was able to solve it by downsampling the data. Keep downsampling till you no longer have the issue. Example on 50% downsampling rows: B=A(1:2:end,:)

[Ding Ding]

Downsampling works! It seems that if the sampling points on a curve are too dense, they will be processed into a solid line.

Answer 3

[Thomas Lindvall]

I have the same issue in R2018a.

Answer 4

[Georges Chahine]

same issue

[Georges Chahine]

2021b

Answer 5

[Ding Ding]

same issue in R2021a