遍历列表并串联R中的字符串（语法）

Question

I'm trying to create a loop that goes from 1 to 14. Each integer in this loop would be added to the end of the name of a newly created dataframe. Then, it should search a column in an existing dataframe based on the concatenation of a number and text. I've been searching for hours but cannot find a solution.

What I mean is:

while (i <= 14) {
    "newDF" + i <- oldDf %>%
         filter(str_detect(ColumnName, "TEXT" + i)

}

The new dataframes should look like this:

newDF1,newDF2... newDF14

They should be created based on a concatenated string (text + i):

text1,text2..text14

My first challenge is to create a new dataframe based on the concatenation of text and i . I've tried using the str_c command and the str_glue command but get the following error message.

Error in str_c("newDF", i)) <- oldDF: 
  target of assignment expands to non-language object


Error in str_glue("newDF{i}") <- oldDF: 
  target of assignment expands to non-language object

Answer 1

The major problem with your code above is that you can't have any operations to the left of your assignment operator.

for (i in 1:14){
    assign(str_glue("newDF{i}"), oldDF %>%
         filter(str_detect(ColumnName, str_glue("TEXT{i}"))))
}

So technically, this would work even though I feel like there's a better way to do this either with nested lists or using spread and gather. I would say more, but I don't have enough context to solve the problem.