Exporting R lm regression with cbind to text

问题

I have the following lm with a vector of dependent variables:

> fit<-lm(cbind(X1m, X3m, X6m, X1y, X2y, X3y, X5y, X6y, X10y, 
                     X20y, X30y) ~ (ff + dc), data = yields)

When attempting to export the entire output to csv, I get this error:

write.csv(as.data.frame(summary(fit)), file="regression1.csv")
Error in as.data.frame.default(summary(fit)) : 
  cannot coerce class ""listof"" to a data.frame

If I export just coefficients, everything works fine:

write.csv(as.data.frame(coef(fit)), file="regression1.csv")

I would like, however, to have t-statistics and standard errors along with my coefficients.

I know this has to do with the fact that the dependent variables are a list (vector). Any thoughts or suggestions would be appreciated.

回答1:

I've found tidy in the broom package useful for this:

fit <- lm(y ~ x, data.frame(x=1:10, y=rnorm(10))) # dummy example

library(broom)
tidy(fit)

# result is a data.frame:
#         term   estimate std.error  statistic   p.value
#1 (Intercept) -0.3317979 1.2034887 -0.2756967 0.7897685
#2           x -0.0663678 0.1939598 -0.3421730 0.7410364

回答2:

x=1:100
y=2*x+1
fit<-lm(y~x)

Use the str(summary(fit)) you will see the structure of summary，and there is something that cannot be converted to dataframe

> str(summary(fit))
List of 11
 $ call         : language lm(formula = y ~ x)
 $ terms        :Classes 'terms', 'formula' length 3 y ~ x
  .. ..- attr(*, "variables")= language list(y, x)
  .. ..- attr(*, "factors")= int [1:2, 1] 0 1
  .. .. ..- attr(*, "dimnames")=List of 2
  .. .. .. ..$ : chr [1:2] "y" "x"
  .. .. .. ..$ : chr "x"
  .. ..- attr(*, "term.labels")= chr "x"
  .. ..- attr(*, "order")= int 1
  .. ..- attr(*, "intercept")= int 1
  .. ..- attr(*, "response")= int 1
  .. ..- attr(*, ".Environment")=<environment: R_GlobalEnv> 
  .. ..- attr(*, "predvars")= language list(y, x)
  .. ..- attr(*, "dataClasses")= Named chr [1:2] "numeric" "numeric"
  .. .. ..- attr(*, "names")= chr [1:2] "y" "x"
 $ residuals    : Named num [1:100] 7.15e-14 -5.36e-13 2.16e-14 9.05e-15 2.49e-14 ...
  ..- attr(*, "names")= chr [1:100] "1" "2" "3" "4" ...
 $ coefficients : num [1:2, 1:4] 1.00 2.00 1.12e-14 1.92e-16 8.93e+13 ...
  ..- attr(*, "dimnames")=List of 2
  .. ..$ : chr [1:2] "(Intercept)" "x"
  .. ..$ : chr [1:4] "Estimate" "Std. Error" "t value" "Pr(>|t|)"
 $ aliased      : Named logi [1:2] FALSE FALSE
  ..- attr(*, "names")= chr [1:2] "(Intercept)" "x"
 $ sigma        : num 5.56e-14
 $ df           : int [1:3] 2 98 2
 $ r.squared    : num 1
 $ adj.r.squared: num 1
 $ fstatistic   : Named num [1:3] 1.08e+32 1.00 9.80e+01
  ..- attr(*, "names")= chr [1:3] "value" "numdf" "dendf"
 $ cov.unscaled : num [1:2, 1:2] 0.040606 -0.000606 -0.000606 0.000012
  ..- attr(*, "dimnames")=List of 2
  .. ..$ : chr [1:2] "(Intercept)" "x"
  .. ..$ : chr [1:2] "(Intercept)" "x"
 - attr(*, "class")= chr "summary.lm"

So use this can get the t-statistics and standard errors

write.csv(summary(fit)$coefficients,'C:/Users/sony/Desktop/a.csv')

来源：https://stackoverflow.com/questions/27895138/exporting-r-lm-regression-with-cbind-to-text

标签

csv

export