r - getOptionChain with multiple expiries -

i use r download option chains, via quantmod package. goal download , export option chains in order used on other software.

if download front month expiry, able correctly export .txt file, using these lines:

library(quantmod) aapl_front <- getoptionchain ('aapl') front <- do.call('rbind', aapl_front) write.table (front, 'data_front.txt')

problems appear when download expiries. here rbind function fails work think should, , export table useless; these lines:

aapl_total <- getoptionchain('aapl', null) total <- do.call('rbind', aapl_total) write.table(total, 'data_total.txt')

i guess in second case aapl_total list of lists, contains expiries, , i'm not able correctly split them.

any suggestions?

you loop through each expiration , rbind calls , puts.

lapply(aapl_total, function(x) do.call(rbind, x))

then, you'd have list do.call(rbind()).

in 1 step:

do.call(rbind, lapply(aapl_total, function(x) do.call(rbind, x)))

Sharma