@pelson Nice!

@pelson Which backend are you using for the png?

Now there is a good question. In the script, I have 'TkAgg'.

The pngs are bad when created from the Agg backend. Hmmm, curious. What is also funny is that the line produced in the test for SVG and PDF is different to that in the script. I'm sure I'm doing something daft.

Now there is a good question. In the script, I have 'TkAgg'.

The pngs are bad when created from the Agg backend.

How? The line is in a different place? Or is it bad quality?

Can you compare the line created with the agg backend and the line created with the cairo backend?

What is also funny is that the line produced in the test for SVG and PDF is different to that in the
script. I'm sure I'm doing something daft.

In some sense, that kind of makes sense. Doesn't the testing framework nuke all your rc defaults?

The line is in a different place?

Completely.

The line is in a different place?

Completely.

Bugger.

:-) indeed.

Ok. So I'm going to take stock, and have a good think about this one. The order of saving the results is important, so I think there is some caching issues going on. I'm happy to spend some time on this in the next couple of days to track this down.

This issue should now be completely resolved by this PR. The only remaining concern is getting the text in the image to pass on travis. I will add a new commit which removes the text from the images.