plyr

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l_ply: how to pass the list's name attribute into the function?

Say I have an R list like this: > summary(data.list) Length ClassMode aug9104AP18data.frame list Aug17-10_acon_7pt_dil_series_0118data.frame list[详细]

2023-01-12 13:27 分类：问答
Reshape data based on column in dataframe

I need to take a data.frame in the format of: id1 id2 mean start end 1AD41215 2BE开发者_StackOverflow社区51415[详细]

2023-01-11 06:05 分类：问答
Assigning group ID with ddply

Pretty basic performance question from an R newbie. I\'d like to assign a group ID to each row in a data frame by unique combinations of fields. Here\'s my current approach:[详细]

2023-01-07 23:08 分类：问答
break dataframe into subsets by factor values, send to function that returns glm class, how to recombine?

Thanks to Hadley\'s plyr package ddply function we can take a dataframe, break it down into subdataframes by factors, send each to a function, and then combine the function results for each subdatafra[详细]

2023-01-02 10:01 分类：问答
How do I sub sample data by group using ddply?

I\'ve got a data frame with far too many rows to be able to do a spatial correlogram. Instead, I want to grab 40 rows for each species and run my correlogram on that subset.[详细]

2023-01-01 02:12 分类：问答
Repeat elements of vector in R

I\'m trying to repeat the elements of vector a, b number of times. That is, a=\"abc\" should be \"aabbcc\" if y = 2.[详细]

2022-12-30 15:24 分类：问答
How can I structure and recode messy categorical data in R?

I\'m struggling with how to best structure categorical data that\'s messy, and comes from a dataset I\'ll need to clean.[详细]

2022-12-29 18:26 分类：问答
洛阳三代试管婴儿医院排名前两家是哪些？？

结婚两年，快29岁了，多处囊肿，输卵管堵塞。后来想做人工授精。然而，经过几次在被封锁的一侧推来推去，人们再也没能成功。现在医生建议我直接做三代试管，说成功率比较高开发者_如何学运维。我和老公都是洛阳人，[详细]

2022-12-27 19:47 分类：问答
iPhone - database reading method and memory leaks

in my application, a RSS r开发者_如何转开发eader, I get memory leaks that I can\'t fix because I can\'t understand from where they come from. Here is the code pointed out by Instruments.[详细]

2022-12-27 18:28 分类：问答
做胎教时准爸爸怎么跟腹中的宝宝说话?？

开发者_Go百科我媳妇是准妈妈。她将在三四个月后分娩。怀孕期间，她一直懒于胎教。现在还有几个月的时间去努力。她想让宝宝的大脑在肚子里大开，她不希望宝宝出来的时候输在起跑线上。个人觉得胎教不是很重要，但还[详细]

2022-12-26 22:22 分类：问答