Fix previous plot still showing when re-plotting after zooming in

Closes #95 (closed)

requested review from @ldam

@kienle It's good. But I think we should remove self.clear_plot() at line 512.

assigned to @kienle

If that line is removed, the plot would not be cleared when we load a new data set (#77 (closed)).

removed review request for @ldam

requested review from @ldam

approved this merge request

added 6 commits

• e9a0ea15...d47eb3f4 - 5 commits from branch master
• 40731905 - Clear plot before re-plotting

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added 5 commits

• 40731905...5c47aceb - 4 commits from branch master
• f9dc3b3d - Clear plot before re-plotting

Compare with previous version

merged

mentioned in commit 50e49118

changed the description