How to execute a command that is built as string

Question

I am looking to build strings, that should be the input for executing a command. The string is ready and constructed as described below.

Question:

How can I send the content of the string as a command?

# Build list with content
my_list <- list("no1" = 12)

# Define content, parts of string.
text_left  <- "ls.str("
text_right <- ")"

# Build string.
test_string_result <- paste0(
  text_left,
  "my_list",
  text_right
)

# Result of string.
print(string_result)

The printout of command "print(string_result), gives:

[1] "ls.str(my_list)"

Wanted result:

I want the "string_result" to be the base for sending the content as a command, e.g. it should send "ls.str(my_list)

`eval(parse(text = test_string_result))`. – Rui Barradas Jul 03 '19 at 10:51 — Rui Barradas, Jul 03 '19 at 10:51

score 1 · Accepted Answer · answered Jul 03 '19 at 10:51

1

Use eval(parse(text=print(test_string_result)))

Results in:

no1 : num 12

answered Jul 03 '19 at 10:51

Alex

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How to execute a command that is built as string

1 Answers1