choose a series of critical points, we will get a series of TPR and TNR, the corresponding point of these values to link up, forming the ROC curve. The ROC curve can help us understand the performance of this classifier, and can easily compare the performance of different classifiers. When the ROC curve is drawn, it is customary to use 1-TNR as the horizontal axis and TPR as the ordinate. Let's look at how to draw the ROC curve in the R language.
# do a logistic regression, generate a probabi
Opencascade conic to bspline curves-parabola
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Abstract.Rational bezr curve can represent conic curves such as circle, ellipse, Hyperbola ,. etc. but how to convert a conic curve to bspline curve is still question, I. e. represent a conic curve in bspline form. parabola curve is the most simple conic curve, that the parabola does not require rational functions. let's begin from the simplest
Other curvesMany of the curve functions are useful in object modeling, animation trajectory description, data and function visualization, and other graphical applications. Common curves include conic, triangular and exponential functions, probability distributions, general-purpose polynomial, and spline functions . The display of these curves can be generated using the circle and ellipse functions similar t
This article mainly introduces the Simple Method of Drawing curves using HTML5 Canvas. It is the basic knowledge of HTML5 beginners. If you need it, refer to the curve method that comes with Canvas2D.
Recently, I have been studying the computation of 3D soft bodies, so I am trying to make up some knowledge. It often involves some numerical analysis, mainly the various interpolation algorithms of curves. Sud
5.10.11 ADD multiple fitted curves in a histogram Contents
1 Summary
2 What are you would learn
3 Steps
3.1 Frequency Count
3.2 Fit Peaks
3.3 Add The fitted curves
3.4 Sample Data
SummaryOrigin allows the peaks from the result of frequency count. Also, fitted curves can added into the new layer in the histo
To give you illustrator software users to detailed analysis to share the plot of the complex smooth curve tutorial.
Method Sharing:
Complex smooth curve is not refers to the macroscopic shape of lines, such as a lot of bumps, depressions, transitions and mutations, and so on, it is a macroscopic view of a whole curve, smooth refers to the curve transition smooth, whether the rapid or soft transition, are smooth. Strategy refers to a method of making, it may not involve the fu
The pictures were taken in the woods, the light was darker, and the mottled shadows were sprinkled from the leaves. So the high light and shaded parts of the little mushroom need to be adjusted.
After adjustment (Micro blog: @ photographer Jen Yen Photography works)
Original film
The Lightroom adjustment parameters are as follows.
1. Basic adjustment of the first step. Moderately increase some exposure to make the skin
This group of "Jungle Little Savage" film is about 5:30 P.M. in our backyard outside the forest corner shot, the woods are tall trees, light is not very sufficient, but there is still a gap between the trees through the sun to shine on the hair, there are some backlighting effect.
After adjustment (@ photographer Jen Yen works)
Original film
The woods shooting, the original light is not enough, take this picture when the sun is cloud occlusion, weak some, grinding mush
lenses, with the parameters: ISO1000, shutter 1/200, aperture 1.8.
Post-Lightroom adjustments are as follows:
1, the basic adjustment: Such indoor light shooting later adjustment is the focus of the white balance. Generally will be taken out of the yellow, here for this adjustment white balance parameters are as follows.
Another common problem is that the dark part is dark, so you need to add the whole exposure, then lighten the shadow
The first contact with Cashapelayer and Bezier curves, see the next Geek College video. It feels good for beginners. Today, a tutorial on creating a simple circular progress bar with Cashapelayer and Bezier curvesLet's start with a brief introduction to the next Cashapelayer1,cashapelayer inherits from Calayer, all properties of Calayer can be usedIt makes sense to use 2,cashapelayer with Bezier curves.Shape: ShapesBezier
Reprinted from: http://46aae4d1e2371e4aa769798941cef698.devproxy.yunshipei.com/qiaoqiaoqiao2014/article/details/469287871.CAShapeLayer Introduction1.1CAShapeLayer inherits from Calayer and can use all the property values of Calayer;1.2CAShapeLayer requires Bézier curves to be used in order to make sense (that is, to have effects)1.3 Using Cashapelayer (belonging to coreanimation) and Bezier curves can be im
Curve method of canvas2d self-band
Recently in the study of 3D soft body calculation, so crazy to fill some knowledge. Often involves some numerical analysis of things, mainly the curve of various interpolation algorithms. It suddenly occurred to me that the canvas2d itself was also able to draw curves, using two times and three Bezier curves. In fact, I have not used it for this method, now to try it ~
T
Use the UIBezierPath ability to create vector-based paths, which are the Core Graphics framework's encapsulation of paths. Use this class to define simple shapes, such as ellipses, rectangles, or shapes that have multiple lines and curved segments.UIBezierPathis CGPathRef the encapsulation of the data type. If the path is based on a vector shape, it is created with straight lines and curves. We use straight segments to create rectangles and polygons,
Waveform graphs receive multiple data types to display multiple curves. The waveform receives a two-dimensional array of values, and one line in the array is a curve . The waveform graph treats the data in the array as a point on the graph, starting at x = 0 and incrementing the x index in increments of 1. Connecting a two-dimensional array data type to a waveform diagram, right-clicking the waveform and choosing Transpose Array from the shortcut menu
In general, we usually use a chart that inserts a curve directly. But sometimes, when we finish the experiment, we need to make a comparative analysis of the results. Then, you will need to draw multiple curves on a graph to compare the curves. On this, small knitting is also very confused, in order to solve this problem, small knitting specially learned the operation process. Below, the small set will be h
This article describes how to use the path in HTML5Canvas to draw second-and third-order besell curves. This article provides implementation code, examples, and explanations. For more information, see HTML5 Canvas, you can use the following methods to describe the third-and second-order besell curves:
The Code is as follows:
Context. bezierCurveTo (cp1x, cp1y, cp2x, cp2y, x, y)Context. quadraticCurveTo
A-error curves
Time limit:3000 Ms
Memory limit:0 KB
64bit Io format:% LLD % llusubmitstatuspracticeuvalive 5009 appoint description:
DescriptionJoseph Ina is a clever girl and addicted to machine learning recently. She pays much attention to a method called linear discriminant analysis, which has interesting properties.
In order to test the algorithm's efficiency, she collects collect datasets. what's more, each data is divided into two parts: traini
In the canvas feature provided by HTML5, which is the canvas, the GetContext () method returns an object that provides methods and properties for drawing on the canvas. Taking the method provided in GetContext ("2d") as an example, this paper briefly studies the Bezier curve which is used to draw the curve path.The GetContext ("2d") in JavaScript gives us two ways to draw Bezier paths, Quadraticcurveto () for plotting two Bezier curves and Beziercurve
Brief introductionBezier curves can make a lot of complex effects, such as the complex animation of bouncing balls, first speed down, stop, and then bounce back gradually slow effect.The two URLs commonly used with Bézier curves are as Follows:Easing function: http://www.xuanfengge.com/easeing/easeing/cubic-bezier:http://cubic-bezier.com/How to draw curves with B
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