Appending information to a file to create a log

[Henrik L Nordmark]

Dear community,

I apologize if this is very trivial, but I haven't been able to figure this out on my own. 

I have been looking in the Julia documentation - especially the Text I/O section - for a way of appending data to a file. I have a for loop for which I would like to append some info to a file at the end of every iteration in order to create a log.

I usually use writecsv(filename, A) when I am looking to write out data, but that obviously doesn't work in this context as that would simply overwrite a new csv file after every iteration.

If someone could point me in the direction of the correct Julia syntax to append data to a file, that would be greatly appreciated.

Kind regards,

Henrik. 

[Jacob Quinn]

You need to open the file in "append" mode. See here: http://docs.julialang.org/en/latest/stdlib/base/#Base.open

open(file,"a") do x

    writecsv(x,data)

end

Then write to it, I believe using writecsv or writedlm work fine on open files, but I can't confirm write now; otherwise, you'll need to use the write methods yourself.

-Jacob

[Henrik L Nordmark]

Thanks Jacob that seems to be exactly what I needed!  :-)