d3 v4设置渐变色

数据可视化d3.v4.js

<html> <head> <meta charset="utf-8"> <title>做一个简单的条形图</title> </head> <body> <script src="http://d3js.org/d3.v4.min.js" charset="utf-8"></script> <div id="app"

【iOS系列】-使用CAGradientLayer设置渐变色

有时候iOS开发中需要使用到渐变色,来给图片或者view盖上一层,使其显示效果更好,我们这里使用的CAGradientLayer来设置渐变色要实现的效果如下: Demo地址---下载 // 创建渐变色图层 CAGradientLayer *gradientLayer= [CAGradientLayer layer]; gradientLayer.frame = CGRectMake(100, 100, 200, 200); gradientLayer.colors = @[ (id)[UICo

Android shape自定义形状，设置渐变色

<?xml version="1.0" encoding="utf-8"?> <!-- android:shape=["rectangle" | "oval" | "line" | "ring"] shape的形状,默认为矩形,可以设置为矩形(rectangle).椭圆形(oval).线性形状(line).环形(ring) 下面的属性只有在android:shape

[D3] Animate Chart Axis Transitions in D3 v4

When the data being rendered by a chart changes, sometimes it necessitates a change to the scales and axes of the chart as well. This lesson demonstrates how to animate and synchronize axis transitions on a column chart. var svg = d3.select('.chart')

[D3] Animate with the General Update Pattern in D3 v4

In D3, the General Update Pattern is the name given to what happens when a data join is followed by operations on the enter, update, and exit selections. When a chart's data changes over time and each update can both create new elements and destroy e

[D3] Reuse Transitions in D3 v4

D3 transitions start executing as soon as they’re created, and they’re destroyed once they end. This can present some challenges when attempting to create reusable transitions. This lesson demonstrates how to overcome those challenges using various a

[D3] Animate Transitions in D3 v4

D3 makes it easy to add meaningful animations to your data visualizations. Whether it’s fading in new items or tweening existing shapes to display new values, adding transitions is easy. This lesson shows you how to add animations while building on y

[D3] Debug D3 v4 with Dev Tools

Since D3 outputs standard markup, you can use familiar dev tools and inspectors to debug your visualizations. In this lesson we’ll look at how to use Chrome Dev Tools to examine the data associated with your generated markup and experiment with style

[D3] Build an Area Chart with D3 v4

Similar to line charts, area charts are great for displaying temporal data. Whether you’re displaying a single set of data or multiple sets using an overlapping or stacked layout, D3 provides APIs to make the process straightforward. This lesson walk

[D3] Build a Line Chart with D3 v4

Line charts are often used to plot temporal data, like a stock price over time. In this lesson we’ll see how to use D3 APIs to create our own simplified version of the charts seen on Google Finance. var margin = { top: 10, right: 20, bottom: 65, left

[D3] Build a Scatter Plot with D3 v4

Scatter plots, sometimes also known as bubble charts, are another common type of visualization. They’re extremely versatile thanks to their ability to display multiple dimensions of data simultaneously using x and y position, opacity, color, and even

[D3] Build a Column Chart with D3 v4

Column and bar charts are staples of every visualization library. They also make a great project for combining the essential pieces of D3 like selections, scales, axes, and SVG elements. This lesson walks you through the process of creating an essent

[D3] Make D3 v4 Charts Responsive with the viewBox attribute

Making SVGs responsive is unfortunately not as simple as adding some media queries. This lesson introduces the viewBox attribute, which is used to control how SVGs scale. We’ll also examine a reusable function that can be used to make nearly any visu

[D3] Create Chart Axes with D3 v4

Most charts aren’t complete without axes to provide context and labeling for the graphical elements being displayed. This lesson introduces D3’s APIs for creating, customizing, and displaying axes while building on topics from previous lessons. var m

[D3] Margin Convention with D3 v4

You can’t add axes to a chart if you don’t make room for them. To that end, the D3 community has adopted a simple convention for defining margin sizes that shields most of your code from having to know or care about them. This lesson demonstrates the

[D3] Better Code Organization with selection.call() with D3 v4

Most of D3’s native selection APIs also return the selection (or a new selection), to enable multiple method calls to be chained together. Since the code you write isn’t on the selection prototype, chaining your methods would take some extra work. se

[D3] Basic Interactivity with D3 v4

Data visualizations are a lot more interesting when they’re interactive. Whether it’s clicks, roll overs, or drags, it makes things more compelling, and D3 is up to the task. This lesson demonstrates how to implement basic interactions and shows how

[D3] SVG Graphics Containers and Text Elements in D3 v4

SVG is a great output format for data visualizations because of its scalability, but it comes with some idiosyncrasies and unique challenges. In this lesson we’ll learn how to use graphics containers, the SVG equivalent of a div, as well as text elem

[D3] Start Visualizing Data Driven Documents with D3 v4

It’s time to live up to D3’s true name and potential by integrating some real data into your visualization. This lesson introduces the fundamental concepts of enter, update, and exit selections, topics essential for being successful with D3. var scor

[D3] Create DOM Elements with D3 v4

Change is good, but creating from scratch is even better. This lesson shows you how to create DOM elements from D3 and insert them into your document as needed. You’ll officially be on your way to creating data visualizations! d3.select('.title') .in

巴特西