Feature request - Plot blank spaces for NaN values in a waveform

Hi Uwe,

Thank you again for all your hard work for the community.

I have a feature request for your consideration, and it looks like the feature requests have been disabled on Sourceforge (https://sourceforge.net/p/qwt/feature-requests/), so I'll post it here:

In some uses, it's a very common thing to have data with missing elements. Currently, to plot gaps or spaces in a waveform it appears that the user must subclass and and begin overriding and customizing functions.

http://www.qtcentre.org/threads/2175...urve-with-gaps
http://www.qtcentre.org/threads/3426...ervals-in-them
http://www.qtcentre.org/threads/4520...ues-in-qwtplot

For ease-of-use it would be great if this functionality was baked into Qwt. I'd like to suggest a way to do it that already has acceptance and is easily understood by users.

Gnuplot, plplot, and others simply translate "NaN" values into gaps in their curves. That way, if the user want's a blank spot, they just place NaN's in the correct array locations, which can easily be done as part of a data acquisition or in post-processing. (Gnuplot actually provides a further API to let the user define any character as a skip, i.e. set datafile missing '-')

I hope this was the right place for a feature request.

Thanks again.

Quote:

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Originally Posted by alketi

I have a feature request for your consideration, and it looks like the feature requests have been disabled on Sourceforge (https://sourceforge.net/p/qwt/feature-requests/), so I'll post it here:

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Why do you think they are disabled ? Please add your requests there, if you don't want to be forgotten.

Uwe

Uwe, the "+ Create Ticket" button is only available in the Bugs and Patches categories.

It is not available in the "Feature Requests" category.

I can provide screenshots if you don't see the same thing.
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Edit: The "+ Create Ticket" option now appears in the Feature Requests. I'll file a formal request. Thanks.

As you created a "feature Request" you have already noticed that I changed the permissions for uploading bug reports, patches and features requests to anonymous. Now it should be open - even without having a sourceforge account ( I will be more restrictive again, when there will be a lot of spam ).

Uwe