Perhaps you want to read the files only once, and save those 85 or
whatever versions you want.
For Search&Replace you might want to take a look at ?gsub and friends.
Uwe Ligges
Romain wrote:
Hi there,
I would like to know if it is possible to modify a text file with a R function.
In fact I would like to know if a function "Search & Replace" exists.
My problem is to create config files from a Base file in which I have to modify
values of parameters.
My Base File:
#...
#...
Param1= V1_1
#...
Param2 = V2_1
Param3 = V3_1
#...
What I would like for each created file i:
#...
#...
Param1= V1_i
#...
Param2 = V2_i
Param3 = V3_i
#...
For the moment my solution is to read each line of the config file, modify if
needed the line and recopy it in the new file. But the problem is that my file
is about 500 lines and I would like to create a lot of different version of
Config_file from my Base file so with this method it takes a long time and i'm
sure i can improve it. (For example for 85 differents files I have to wait
10min...)
My dream would be a function like this one :
Function <- function(Base_file, Param_array, Value_array)
{
file.copy(Base_file, Config_file)
...
for (i in length(Param_array)
{
Search&Replace(Config_file, "Param_array[i] = something", "Param_array[i] =
Vallue_array[i]")
}
...
}
I hope I have been clear enough. If not, don't hesitate to ask me more details!
Thank you for your help.
Have a good day!
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and provide commented, minimal, self-contained, reproducible code.
