这篇文章主要介绍了PROC SQL中逻辑判别和描述性统计函数怎么用,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
成都创新互联凭借专业的设计团队扎实的技术支持、优质高效的服务意识和丰厚的资源优势,提供专业的网站策划、成都做网站、成都网站建设、网站优化、软件开发、网站改版等服务,在成都十载的网站建设设计经验,为成都近1000家中小型企业策划设计了网站。1.逻辑表达:>,<,!=,....
*data step; data class_flags; set sashelp.class; tall = (height > 60); male = (sex = 'M'); female = (sex = 'F'); run; *proc sql; proc sql; select name, (height > 60) as tall, (sex = 'M') as male, (sex = 'F') as female from sashelp.class; quit;
2.描述性统计函数sum(),mean(),....
proc sql; select sex, max(height) as max_ht, mean(weight) as mean_wt from sashelp.class group by sex; quit; proc sql; select age, max(height*height/weight) as max_body_mass_index from sashelp.class group by age; quit;
3.联合使用
proc sql; select max(height > 60) as any_tall, mean(weight > 100) as pct_heavy, sum(gender = 'F') as num_female from sashelp.class; quit;
proc sql; select sex, max(height > 60) as any_tall, mean(weight > 100) as pct_heavy from sashelp.class group by sex; quit;
感谢你能够认真阅读完这篇文章,希望小编分享的“PROC SQL中逻辑判别和描述性统计函数怎么用”这篇文章对大家有帮助,同时也希望大家多多支持创新互联网站建设公司,,关注创新互联行业资讯频道,更多相关知识等着你来学习!
售后响应及时
7×24小时客服热线数据备份
更安全、更高效、更稳定价格公道精准
项目经理精准报价不弄虚作假合作无风险
重合同讲信誉,无效全额退款