使用循环一次运行许多回归 [英] Use a loop to run many regressions at once

问题描述

我有一个147列的数据集，每列7行.我想使用每个列运行单独的回归分析.

I have a data set with 147 columns, each with 7 rows. I want to run a separate regression analysis using each column.

fit = nls(DD$X1, ~ (1/(1+k*xValues)),start=list(k=k))

说明:

DD是数据集:它是一个数据帧)级别为"X1，"，"X2"等.

DD is the dataset: it's a data frame) The levels are "X1," "X2", etc.

xValues = c(1,2,7,14,30,180,720)

k是我要确定的参数)

但是我想循环执行，例如接下来以DD $ 2的价格购买，一直到DD $ 147. 一路上，我想存储拟合值.

But I want to do it in a loop, e.g. next to do it for DD$2, ... all the way to DD$147. Along the way I'd like to store the values of fit.

我是r的新手:有人可以建议如何做吗?非常感谢.

I'm new to r: could someone suggest how to do this? Many thanks.

推荐答案

我在这里使用BodyFat数据集.您必须替换数据集文件名，并为响应和解释变量分配适当的列.

I am using BodyFat dataset here. You have to replace dataset file name and also assign proper column to response and explanatory variables.

formu <-function(a,lis)
{
 k=""
 k= paste(a,'~',sep="")
 h=do.call("paste", c(lis, sep = "+"))
 formula1= paste(k,h,sep="")
 return(formula1) 
}

results=list()
dat = read.table("BodyFatPercentage.txt",header=TRUE)
g=names(dat)
target=names(dat)[2:2]
print(target)
expla=names(dat)[3:16]
for(i in 1:length(expla))
{
 formula1=formu(target,list(expla[i]))
 model1=lm(formula1,dat)
 print(model1)
 results[i] = model1
}
print results

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