结果:找到“R Numeric”相关内容812个,排序为按回复时间降序,搜索更多相关帖子请点击“高级”
关于SAS numeric型 变量长度的疑惑
10 个回复 - 6595 次查看
闲话少说,先上程序:
DATA test;
attrib a length=8 format=20.2;
a = 123456789.12;
run;
上面的测试程序中,变量 a 的length定义为8, 但是赋值长度超过了8,由于有format的存在,a 仍然可以完整的保 ...
2011-8-24 15:12 - guodong1986718 - SAS专版
Numerical Methods for Structured Markov Chains
3 个回复 - 1154 次查看
Intersecting two large research areas–numerical analysis and applied probability/quering theory–this book is a self -contained introduction to the numerical solution of structured Markov chains, whi ...
2019-7-16 07:13 - nivastuli - 博弈论
Numerical Methods for Finance
5 个回复 - 1849 次查看
Numerical Methods for Finance
by John A. D. Appleby, D. C. Edelman, and J. A. H. Miller
September 21, 2007
Chapman and Hall/C
RC
Reference - 312 Pages - 59 B/W Illustrations
ISBN 97815848892 ...
2016-3-28 04:08 - SleepyTom - 金融工程(数量金融)与金融衍生品
免費 Numerical Methods for Finance
10 个回复 - 2406 次查看
Numerical Methods for Finance (Chapman & Hall/C
RC Financial Mathematics Series)John Miller (Editor), David Edelman
(Editor), John Appleby (Editor)
Publication Date: September 21, 2007 ...
2012-10-23 12:15 - martinnyj - 金融学(理论版)
Numerical Solution of Differential Equations
23 个回复 - 1656 次查看
Cambridge | English | 2018 | ISBN-10: 1107163226 | 293 Pages | PDF | 3.57 mb
by Zhilin Li (Author),? Zhonghua Qiao (Author),? Tao Tang (Author)
This introduction to finite difference and finit ...
2017-12-7 10:04 - igs816 - 经管书评
Numerical Linear Algebra: An Introduction
10 个回复 - 1316 次查看
Cambridge | English | 2018 | ISBN-10: 1107147131 | 418 pages | PDF | 3.67 mb
by Holger Wendland (Author)
This self-contained introduction to numerical linear algebra provides a comp ...
2017-12-7 11:22 - igs816 - 经管书评
Numerical Computing with Python
34 个回复 - 7346 次查看
English | December 21, 2018 | ISBN: 1789953634 | 676 pages | PDF
Understand, explore, and effectively present data using the powerful data visualization techniques of Python
Key Features
Use th ...
2019-1-20 23:14 - igs816 - python论坛
求助:character 转换成 numeric?
8 个回复 - 33007 次查看
有一列数据data[,"price"]: "2,112.00" "2,113.00" "2,114.00" 是character
用as.numeric(data[,"price"]), 显示警告:强制改变的过程中产生了NA。
请问,该怎么才能正确转换?谢谢
2015-4-13 17:14 - 灵石路8号 - R语言论坛