## understand tensorflow graph

To understand tensorflow computation graph, you need to know how to print or plot it. If you can visualize the computation graph, it would be easy to understand it. The […]

To understand tensorflow computation graph, you need to know how to print or plot it. If you can visualize the computation graph, it would be easy to understand it. The […]

np.random.seed(4) m = 60 w1, w2 = 0.1, 0.3 noise = 0.1 angles = np.random.rand(m) * 3 * np.pi / 2 – 0.5 X = np.empty((m, 3)) X = np.empty((m, […]

import numpy as np X=2*np.random.rand(100,1) y=4+3*X+np.random.randn(100,1) X_b=np.c_[np.ones((100,1)),X]# add x0 = 1 to each instance theta_best=np.linalg.inv(X_b.T.dot(X_b)).dot(X_b.T).dot(y) numpy.rand(100,1) generates a 100*1 array, whose elements are random number ranging from 0 to 1. numpy.randn(100,1) generates a 100*1 array whose elements […]

We’ve learnt sklearn KFold. KFold splits an array into several groups. If the elements in the array are associated with a label/class, there would raise a problem. The ration of […]

KFold is a class in the model_selection module of sklearn package. The usage of KFold is simple: kfold=KFold(n_splits,shuffle, random_state) Now, a KFold object is ready. Notice that the data to […]

An object is called an iterable object if it has an __iter__ method. List, tuple, dict are all iterable objects[reference]: The __iter__ method returns an iterator object. An object is […]

In the chapter 3 of the book “Hands-On Machine Learning with Scikit-Learn and TensorFlow”, the author plays a big joke with the readers. The fetch_mldata function in the python module […]

If you are learning machine learning on your computer. The first thing would be running the jupyter app to do some hands-on. Running this program is not similar to running […]

We’ve talked about simulating mouse click in C language. Today, we’ll learn how to simulate mouse click in jQuery. There seem quite a few methods to simulate a mouse click […]

I have a very simple test project based on QtWebEngine: ——webengineview.h——- #ifndef WEBENGINEVIEW_H #define WEBENGINEVIEW_H #include <QWebEngineView> class WebengineView : public QWebEngineView { Q_OBJECT public: WebengineView(QWidget *parent = 0); ~WebengineView(); […]