r - Using a for loop to extract coefficients from multiple models -


i have multiple cox models (with 1 variable static in models) , trying extract coefficient variable.

in models coefficient indexed follows: example in model1 model1[[8]][1] ; model2 model2[[8]][1] etc. attempted create loop r shown below not working.

could me why getting error when running following code

for (i in 1:5) { coef[i] <- exp(summary(model[i])[[8]][1]) }

i following error "object 'model' not found".

many in advance

a

here example of meant in comment

data(iris) model1 <- lm(data = iris, sepal.length ~ sepal.width + species) model2 <- lm(data = iris, sepal.length ~ sepal.width)

you can don't have type models.

model.list<-mget(grep("model[0-9]+$", ls(),value=t))

ls() lists object have , grep() taking objects have names "model" followed number. 

coefs<-lapply(model.list,function(x)coef(x)[2]) unlist(coefs)  sepal.width sepal.width   0.8035609  -0.2233611

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