Programmer Group

matplotlib is inspired by MATLAB. Matlab is a widely used language and tool in the field of data drawing. MATLAB language is process oriented. Using function call, matlab can easily use a line of command to draw lines, and then use a series of functions to adjust the results. Matplotlib has a set of dra ...

Article directory Read video stream Screen insert text Read video stream cv2.getcapture(), use the function cap.get(propId) to get some parameter information of the video. Here the propId can be any integer between 0 and 18. Each number represents an attribute of the video: cv2.VideoCapture.get ...

Object oriented encapsulation case Encapsulation is a major feature of object-oriented programming The first step of object-oriented programming -- encapsulating properties and methods into an abstract class Objects are created using classes, and then objects call methods The details of the object ar ...

The use of ObservableCollection in two way binding notification mechanism in WPF </div> The observablecollection < T > class in msdn represents a dynamic data collection that provides notifications when items are added, removed, or the entire list is refreshed. In many cases ...

Events in js Events in javascript can be understood as an interactive operation in HTML documents or browsers. 1, How to bind events 1. Inline This mode is the most traditional way to handle events. In the inline model, the event handler is an attribute of the HTML tag that handles the specified e ...

JS HTML DOM When the web page is loaded, the browser creates the document object model of the page. With the HTML DOM, JavaScript can access and change all elements of an HTML document. DOM document operation Find HTML elements Method describe Example document.getElementById(id) Find elements ...

I. Preface The previous section describes the principle of machine learning decision tree and how to select the optimal feature as the classification feature. Main contents of this section: Decision tree construction Decision tree visualization (white box model, neural network is black box model) Usi ...

Preface Linq is a very useful set processing library in C, which can help us simplify a large number of smelly and long nested loops and make the processing logic clear. EF queries also rely on Linq. But Linq has some disadvantages compared with sql, the most important is the difficulty of dynamic query construction. sql only needs simple strin ...

When many desktop software is opened, there are options such as remembering password, and it can also be read without networking. This is because it writes the configuration information locally, reads the local configuration information before opening each time, and then loads the relevant configuratio ...

WPF programming treasure -- on custom elements Written in front Building basic user controls Create project Define properties, methods, and events Add mark Using tutorials Write at the end Written in front I finished the first half of this section yesterday, and then I wrote a color control ...