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arogozhnikov.github.io is a HTML library typically used in Artificial Intelligence, Machine Learning, Unity applications. arogozhnikov.github.io has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

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Implementing a cell-based widget in Qt5

Segmenting numpy arrays with as_strided

SVM decision function: visualizing class separation

QUESTION

Implementing a cell-based widget in Qt5

Asked 2019-May-09 at 03:50

I'm trying to implement a cell-based widget similar to the one in Jupyter Notebook in Qt where multiple cells are stacked vertically. Each cell is made of a QTextEdit and multiple buttons and the cell's vertical size would grow by entering more text into the text edit (i.e. no vertical scrollbars in the text edit).

However I'm not sure what the best way would be to implement such a widget in Qt. I've tried a QListWidget with a custom widget (made of a QTextEdit and a couple of buttons) for each item, however the custom widget wouldn't grow vertically by entering more text and instead the QTextEdit scrollbars would show up. I also implemented a second version using QListView and QStyledItemDelegate however I encountered multiple issues including not being able to interact with the painted buttons (through the delegate).

Any suggestions/examples about how to implement such a cell-based widget?

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ANSWER

Answered 2019-May-09 at 03:50

You can subclass QTextEdit and listen for changes in the document size using document()->size() (not the size of the QTextEdit, mind). You can then resize the QTextEdit's parent to reflect the new size. To fill the parent with the widget, use a layout. I've used QVBoxLayout several times below for this purpose. (One, to hold multiple QTextEdit widgets in a vertical column; Two, to hold a single TextEdit).

Source https://stackoverflow.com/questions/53800168

QUESTION

Segmenting numpy arrays with as_strided

Asked 2018-Feb-12 at 11:08

I'm looking for an efficient way to segment numpy arrays into overlapping chunks. I know that numpy.lib.stride_tricks.as_strided is probably the way to go, but I can't seem to wrap my head around its usage in a generalized function that works on arrays with arbitrary shape. Here are some examples for specific applications of as_strided.

This is what I would like to have:

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ANSWER

Answered 2018-Feb-12 at 11:08

Based on DanielF's comment and his answer here, I implemented my function like this:

Source https://stackoverflow.com/questions/48702039

QUESTION

SVM decision function: visualizing class separation

Asked 2017-May-17 at 16:34

in order to visualize the separation of the two classes by a linearSVC, I'm using a plot (defined in the function below)

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ANSWER