Interactive QGraphicsView (pan/zoom/rotate) Graphics View provides a platform for the management and interaction of a large number of custom 2D primitives. The framework includes an event propagation Architecture , Support the precise double-precision interactive function of the primitive Item in the scene.
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scipy.optimize.curve_fit(f, xdata, ydata, p0=None, sigma=None, absolute_sigma=False, check_finite=True, bounds=- inf, inf, method=None, jac=None, **kwargs)[source] ¶. Use non-linear least squares to fit a function, f, to data. Assumes ydata = f(xdata, *params) + eps.
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Jul 05, 2011 · Re: Auto scale a QGraphicsView See the docs - using itemsBoundingRect() could be an expensive operation if there are many items. If you are doing this during a resize event, then resizing might have bad performance problems since the scene would have to calculate the bounding rect for you, then transform everything to redraw it in the new size.
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My last tutorial went over Logistic Regression using Python. One of the things learned was that you can speed up the fitting of a machine learning algorithm by changing the optimization algorithm. A…
The size is scaled freely. The aspect ratio is not preserved. ... QGraphicsScene and QGraphicsView to specify how items are selected, ... Scale the image to fit to ...