| 查看: 546 | 回复: 1 | ||
[求助]
R求助
|
|
最近用R处理数据，有以下几个问题问高手: 1,You used a linear model. This assumes that your data (the residuals) are normally distributed? If not, have you tried to transform the residuals so that they are normally distributed? If residuals are not normally distributed and cannot be transformed so that they become normally distributed, have you tried a generalized linear model (GLM) with an appropriate error structure (given by the "family"-command in glm - in R: model <- glm (y ~ x), family= "gaussian / binomial / Gamma / etc."  对于统计数据中有缺失的部分，我一律用R代替，请问如何判断这些数值的出现是否为"gaussian / binomial / Gamma ？还是要一个一个尝试？ gaussian / binomial / Gamma 怎么体现在R语句中？具体怎么操作？ 2, What y and what x did you use in "lm(formula = y ~ x)"? You can use several explanatory variables (x) in a lm or glm but only one response variable (y)? 3,With the ratio of annual species and perennial species, I suggest that you use the logarithm of this ratio: log (annuals / perennials) - this is usually done with ratio-data 对于较小的数值（0—1之间），一般取log，请问是取什么为底的函数？10，2， 还是e? 谢谢！ |
回复此楼» 猜你喜欢
看来今天不会放榜了？
已经有5人回复
-
我面上完蛋了
已经有8人回复
-
只有每年这种时候来逛逛小木虫
已经有25人回复
-
什么时候开奖？
已经有7人回复
-
时间戳又变了
已经有18人回复
-
时间戳又变了8-15
已经有27人回复
-
今天基金会出结果吗？20260819
已经有16人回复
-
科研孤儿太难了
已经有16人回复
-
应该是下周三26日公布了吧？
已经有4人回复
-
投稿咨询
已经有7人回复
2楼2013-11-01 13:44:25
