[Kst] [Bug 86915] ability to operate only on what is visible shown in plot

[Andrew Walker]

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http://bugs.kde.org/show_bug.cgi?id=86915         




------- Additional Comments From arwalker sumusltd com  2007-03-14 23:55 -------
Perhaps before we start discussing implementation details we could decide on the functionality. To get things rolling the LFI team needs to see something like the following:

* for every curve in every plot there will be created two vectors which give the x,y values of all the points contained within the plot boundaries.
* these two vectors will always be of the same length.
* these vectors will automatically update when the view of the data is modified (e.g. the user pans, zooms in, zooms out, etc.)
* these vectors will, like other vectors, automatically create and update associated scalar values (giving values such as mean, std dev, min, max, etc.)
* in the interests of preserving memory the user will have the ability to switch off or on sub-vector generation on a curve by curve basis. The default setting will be sticky.
* the names of the sub-vectors will be such that they are uniquely identified and each sub-vector name will contain the name of each of the parent vector, the curve of which it is part, and the plot within which the curve is found.