loop for character variable names in r

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余生分开走
余生分开走 2021-01-26 04:21

I have a list of variables, like a1, a2, a3. Then I want to do a loop for these variable, for instance, assign values. I tried paste, which just gave character like \"a1\", that

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  • 2021-01-26 05:13

    We can use mget to get the values in a list

    lst <- mget(paste0("a", 1:3))
    

    and then loop through the list and apply the function

    lapply(lst, yourFunction)
    
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  • 2021-01-26 05:22

    The loop assigns values to all elements in your object. 'a1' gets value '2'; 'a2' gets value '3'; etcetera.

    library(stringr)
    val <- str_c("a", 1:3)
    
    for (i in 1:length(val)){
      assign(val[i], i+1)
    }
    get(val[1])#2
    get(val[2])#3
    get(val[3])#4
    
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