Posted on Categories:Data visualization, R语言, 数据可视化, 统计代写

## 统计代写|数据可视化代考DATA VISUALIZATION代考|BIOF439 Using Excel Default Settinqs for Charts

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## 统计代写|数据可视化代考DATA VISUALIZATION代考|Using Excel Default Settinqs for Charts

Microsoft Excel allows for the creation of a variety of charts and tables to visualize data. However, a common mistake is to use the default output from Excel without considering changes to the design and format of the visualizations it produces. Excel’s default settings are counter to many of the suggestions covered in this chapter (and the rest of this textbook) for creating good data visualizations. Consider Figure 3.34. This column chart, which was produced using Excel, shows revenues for eight retail store locations in Texas. The company is interested in comparing revenues by location, and specifically in examining the relative performance of the store located in Laredo because this store has recently had a change in management.

Figure $3.34$ suffers from several flaws that prevent it from being an effective data visualization. The data-ink ratio for Figure $3.34$ is low, so we should consider ways of decluttering the figure. Examining Figure $3.34$ shows that the chart uses ink in several ways that are not useful in conveying the data. The gridlines used in this chart are not particularly useful, so they can be removed. We see that Excel automatically titles the chart “Annual Revenue” and uses a legend with “Annual Revenue.” This is redundant information, and at least one of these labels should be removed. The following steps can be used to declutter the default chart produced by Excel, increase the data-ink ratio, and make the chart more meaningful to the audience.
Step 1. Click anywhere on the chart in the file RetailRevenueChart
Step 2. Click the Chart Elements button $t$
Deselect the check box for Gridlines
Deselect the check box for Legend

## 统计代写|数据可视化代考DATA VISUALIZATION代考|Too Many Attributes

In Section 3-1, we discuss the importance of using preattentive attributes in data visualizations to make them easy to understand by the audience. However, using too many preattentive attributes in the same visualization can cause confusion for the audience. Consider again the case of Stanley Consulting Group. The company wants to examine how consultant characteristics such as job title, length of time with the company, and highest educational degree attained are related to the amount of billable hours filed by that consultant. Figure $3.36$ attempts to show this information.

All of the information the company wants to consider is shown in Figure 3.36: the number of billable hours for each consultant (on the vertical axis), the length of time at the company (on the horizontal axis), the consultant’s job title (indicated by the color of the marker in the chart), and the highest degree attained by the consultant (indicated by the shape of the marker in the chart). Figure $3.36$ uses several preattentive attributes from Section 3-1 including spatial positioning, shape, and color. However, because we are using many different preattentive attributes, this chart is difficult for an audience to process. It requires the audience to scan back and forth between the markers in the chart, the legends, and the vertical and horizontal axes. Therefore, this is probably not a particularly useful chart.

A better chart than what is shown in Figure $3.36$ would concentrate on examining fewer relationships and using fewer preattentive attributes. The exact choice of which features to show on the chart depends on the goals of the chart and needs of the audience. If it is more important to examine the relationship between billable hours, length of time at the company, and the job title of the consultant, then a chart such as the one shown in Figure $3.37$ is preferred.

## 统计代写|数据可视化代考DATA VISUALIZATION代考|Using Excel Default Settinqs for Charts

Microsoft Excel 允许创建各种图表和表格来可视化数据。但是，一个常见的错误是使用 Excel 的默认输出，而不考虑对其生成的可视化的设计和格式进行更改。Excel 的默认设置与本章（以及本教科书的其余部分）中关于创建良好数据可视化的许多建议背道而驰。考虑图 3.34。这个使用 Excel 生成的柱形图显示了德克萨斯州八个零售店位置的收入。该公司有兴趣按位置比较收入，特别是检查位于拉雷多的商店的相对业绩，因为这家商店最近发生了管理层变动。

## 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。