June 2020
Beginner to intermediate
522 pages
9h 6m
Chinese
Content preview from R 语言经典实例（原书第 2 版）
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作者简介
J
.D. Long
是一位被放错位置的南方农业经济学家，目前在纽约市的 Renaissance Re 工
作。J.D. 是 Python、R、AWS 和各种编程技术的狂热用户，并且是 R 会议的常客，也
是芝加哥 R 用户组的创始人。他和他的妻子，一位正在康复的审判律师，以及他 11 岁
的喜欢玩电子技术的女儿住在新泽西州泽西市。
Paul Teetor
是一名定量分析专家，他曾获得统计学和计算机科学硕士学位。他擅长投
资管理、证券交易和风险管理等领域的分析和软件工程。他与大芝加哥地区的对冲基
金、做市商和投资组合经理合作。
封面介绍
本书封面上的动物是哈比鹰（
Harpia harpyja
）
。哈比鹰是世界上 50 种鹰类之一
，是中
美洲和南美洲热带雨林的当地动物，它们喜欢在树冠上部中筑巢。它的属和物种名称都
指的是古希腊神话中的鹰身女妖，即一种面部为女人而身体为鹰的恶性精灵。
一般而言，哈比鹰重约 18 磅（1 磅≈0.453 公
斤），长 36 至 40 英寸（1 英寸 = 0.025 4 米 ），
翼展为 6 至 7 英
尺（1 英尺 = 0.304 8 米），但雌性总是比雄性大一些。然而，两种性别
的哈比鹰的羽毛是相同的：它们的上半部大多是瓦黑色，下半部多是白色或浅灰色。它
们浅灰色的头部具有大羽毛组成的双冠，当显示敌意时，可以立起双冠。
哈比鹰是一夫一妻制的，每两到三年只会养一只雏鹰。雌性通常会一次产下两枚卵，在
第一个孵化后，另一个就弃之不管。虽然雏鹰在六个月内就可以飞行，但父母双方都
会继续照顾和喂养雏鹰至少一年。由于这种很低的种群生长率，哈比鹰特别容易因为栖 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.