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标签:绘图

  • R Graphics Cookbook

    作者:Winston Chang

    This practical guide provides more than 150 recipes to help you generate high-quality graphs quickly, without having to comb through all the details of R's graphing systems. Each recipe tackles a specific problem with a solution you can apply to your own project, and includes a discussion of how and why the recipe works. Most of the recipes use the ggplot2 package, a powerful and flexible way to make graphs in R. If you have a basic understanding of the R language, you're ready to get started. Use R's default graphics for quick exploration of data Create a variety of bar graphs, line graphs, and scatter plots Summarize data distributions with histograms, density curves, box plots, and other examples Provide annotations to help viewers interpret data Control the overall appearance of graphics Render data groups alongside each other for easy comparison Use colors in plots Create network graphs, heat maps, and 3D scatter plots Structure data for graphing
  • 考古器物绘图

    作者:马鸿藻

    《考古器物绘图》概括地论述了考古绘图的意义、种类,初步介绍一些有关考古绘图的必要知识,如绘图工具的使用,绘图的步骤与方法,网字的标注及索描的基础知识在考古绘图巾的具体应用等。考古绘图是一门具体地把制图学应用于考古工作和研究,用制图学的理论和技术来说明考占材料的基础技术科学。《考古器物绘图》全面而系统地讲述了考占器物绘图的基本原理和操作要领,较好地做到了理论和实际的结合。全书结构合理,逻辑性较强。

  • 逝者如渡渡

    作者:申赋渔

    最后一只渡渡鸟,1681年,死于枪口下,毛里求斯。 最后一只旅鸽,1914年,死于辛辛那提动物园,美国。 最后一只隆鸟,1649年,死于人类的捕杀,马达加斯加。 最后一只异龙鲤,1981年,死于异龙湖的干涸,中国。 …… 它们走了,我们还在。孤独的人类是可耻的。 本书叙说了数百年间,世界各地灭绝了的,或正在走向灭绝的30多种动物的故事,记录它们,是在寻找它们,并让它们永远地留在我们心中。寻找,是希望悲剧不再重演,是找回心中对自然的爱,是对未来满怀希望。