r - Extracting coefficients while looping over variable names -

i'm working on time-series stuff in r (version 3.4.1), , extract coefficients regressions ran, in order further analysis.

all results far saved ugarchfit objects, complicated list objects, want extract coefficients in following manner.

what want in essence this:

for(i in list){     i_garch_mxreg <- i_garch@fit$robust.matcoef[5,1] } 

"list" list object, every element name of 1 observation. now, want loop create new numeric object named specified in loop.

now doesn't work because index, 'i', isn't replaced want be.

how rewrite loop appropriately?

minimal working example:

list <- as.list(c("one", "two", "three")) one_a <- 1 two_a <- 2 three_a <- 3 (i in list){    i_b <- i_a } 

what should give me be:

> one_b [1] 1 > two_b [1] 2 > three_b [1] 3 

clarification: want extract coefficients form multiple list objects. these named in manner 'string'_obj. problem don't have function extract these coefficients, list "is not subsettable", have call individual objects via obj@fit$robust.matcoef[5,1] (or there way?). wanted use loop take list of strings, , in every iteration, take 1 string, add 'string'_obj@fit$robust.matcoef[5,1], , save value object, named again " 'string'_name "

it might easier have list rather individual objects, suggest lapply, not primary concern right now.

there easy way this, unable find it. sorry confusion , help.

the following should match desired output:

# list l <- as.list(c("one", "two", "three")) one_a <- 1 two_a <- 2 three_a <- 3  # workspace: note there no one_b, two_b, three_b ls() [1] "l"       "one_a"   "three_a" "two_a"    (i in l){    # first, let's define names characters, using paste:    dest <- paste0(i, "_b")    orig <- paste0(i, "_a")    # let's assign values. since working     # characters, functions assign , come in handy:    assign(dest, get(orig) )  }  # let's check workspace again. note one_b, two_b, three_b ls()  [1] "dest"    "i"       "l"       "one_a"   "one_b"   "orig"    "three_a"  [8] "three_b" "two_a"   "two_b"    # let's check values correct: one_b [1] 1 two_b [1] 2 three_b [1] 3 

to comment on functions used: assign takes character first argument, supposed name of newly created object. second argument value of object. get takes character , looks value of object in workspace same name character. instance, get("one_a") yield 1.

also, follow on comment earlier: if had coefficients in list, following:

# hypothetical coefficients stored in list: lcoefs <- list(1,2,3) # let's name coefficients: lcoefs <- setnames(lcoefs, paste0(c("one", "two", "three"), "_c"))  # push them global environment:     list2env(lcoefs, env = .globalenv)  # @ environment:     ls()  [1] "dest"    "i"       "l"       "lcoefs"  "one_a"   "one_b"   "one_c"    [8] "orig"    "three_a" "three_b" "three_c" "two_a"   "two_b"   "two_c"    one_c [1] 1 two_c [1] 2 three_c [1] 3 

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and address comments, here more realistic example, taking list-structure account:

l <- as.list(c("one", "two", "three"))  # let's "hide" values in list: one_a <- list(val = 1) two_a <- list(val = 2) three_a <- list(val = 3)  (i in l){   dest <- paste0(i, "_b")   orig <- paste0(i, "_a")   # let's list-object:   tmp <- get(orig)   # extract value:   val <- tmp$val   assign(dest, val ) }  one_b [1] 1 two_b [1] 2 three_b [1] 3