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# 数据科学代写|数据可视化代写Data Visualization代考|DATA434 Custom Color Using the Hsl Color System

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## 数据科学代写|数据可视化代写Data Visualization代考|Custom Color Using the Hsl Color System

In the previous examples, we used Excel’s color palettes to demonstrate the various types of color schemes. However, it is also possible to customize the colors used in a chart. We can directly control the hue, saturation, and luminance (HSL) in Excel through the Colors dialog box, which allows for control of each of these three color characteristics in the following ways.
Hue: The color’s hue expressed as an integer in the range 0 to 255 . The primary and secondary colors of the RGB primary color mode using fixed values for saturation and luminance are:
$\begin{array}{rc}\text { Color } & \text { Hue } \ \text { Red } & 0 \ \text { Yellow } & 40 \ \text { Green } & 80 \ \text { Cyan } & 120 \ \text { Blue } & 160 \ \text { Magenta } & 200\end{array}$
In Figure 4.15, we illustrate changing hues with fixed levels of saturation and luminance in the Colors dialog box.

As the value of the Hue parameter increases, the indicator $a_a^a=$ moves horizontally from left to right across the color spectrum control in the Colors dialog box to indicate the selected hue.
Sat: The color’s saturation expressed as an integer in the range 0 to 255 ; higher Sat: values correspond with more intense or pure color, and lower Sat: values produce increasingly gray shades. Setting Sat: to 0 results in a gray tone regardless of the hue and luminance settings. In Figure 4.16, we illustrate changing saturation with fixed levels of hue and luminance in the Colors dialog box.

## 数据科学代写|数据可视化代写Data Visualization代考|Common Mistakes in the Use of Color in Data Visualization

Although color is a powerful tool for communicating with charts, it is often misused. When misused, it may distort the intended message or distract the audience. In this section, we discuss several common mistakes committed when using color in a data visualization.
Unnecessary Color
Data visualization experts agree that color should only be used when it communicates something that no other aspect of a chart communicates to the audience. Figure $4.21$ shows the number of units sold (in thousands) for seven top-selling midsize sedans.

In this chart, the audience can discern which column corresponds to each of the models through the colors of the columns and the legend. Although this communicates the data, we can accomplish the same communication with a chart that creates less cognitive load by avoiding the use of multiple colors. If we clearly label the columns on the horizontal axis, then there is no need for a different color for each model of sedan.

## 数据科学代写|数据可视化代写Data Visualization代考|Custom Color Using the Hsl Color System

颜色  色调   红色的 0  黄色 40  绿色的 80  青色 120  蓝色的 160  品红 200

Sat：颜色的饱和度，以 0 到 255 范围内的整数表示；较高的 Sat：值对应于更强烈或更纯的颜色，较低的 Sat：值产生越来越多的灰色阴影。无论色调和亮度设置如何，将 Sat: 设置为 0 都会产生灰色调。在图 4.16 中，我们说明了在颜色对话框中使用固定级别的色调和亮度来改变饱和度。

## MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。