如何将R中大量以TMC开头的字符对象存入列表？

Hey there! You can easily batch-collect all those TMC-starting character objects into a single list using a couple of R's built-in functions—no need to manually add each one. Here's how:

Step 1: Identify all target object names #

First, use ls() with a regular expression to grab every object in your environment that starts with "TMC":

tmc_object_names <- ls(pattern = "^TMC")

The ^TMC regex ensures we only match objects where the name starts exactly with "TMC", which fits your naming pattern perfectly.

Step 2: Batch-retrieve objects into a list #

Next, use mget() to fetch all those objects and pack them into a list. This function takes a vector of object names and returns a list where each element is the corresponding object (and keeps the original object names as list names, which is handy for reference):

tmc_collection <- mget(tmc_object_names)

Optional: Filter to only include character objects #

If you want to be extra safe (in case there are non-character objects with "TMC" prefixes), you can add a filter to keep only character-type objects:

# Get TMC-named objects, then filter for character type
tmc_object_names <- ls(pattern = "^TMC")
tmc_char_names <- tmc_object_names[sapply(tmc_object_names, function(obj_name) is.character(get(obj_name)))]
tmc_collection <- mget(tmc_char_names)

Verify the result #

To check that everything worked as expected, you can inspect the list structure with str() or preview the first few elements with head():

# Check overall structure
str(tmc_collection)
# Preview first 3 elements
head(tmc_collection, 3)

That's it—you'll have all your TMC-prefixed character objects neatly stored in one list!

内容的提问来源于stack exchange，提问作者mightaskalot