我正在Tweets项目上，我提取了87个变量，现在我需要执行变量选择方法，所以我使用了正向子集选择。但是我遇到了一个错误。
regfit.fwd = regsubsets(screen_name ~.,merge_tweets,method = "forward",
complete.cases(merge_tweets),nvmax = 15)
Error in leaps.setup(x[, ii[reorder], drop = FALSE], y, wt,
force.in[reorder], : NA/NaN/Inf in foreign function call (arg 4)
> head(merge_tweets)
X user_id status_id created_at screen_name
1 1 1339835893 1.090257e+18 1548772454 HillaryClinton
2 2 1339835893 1.090002e+18 1548711688 HillaryClinton
3 3 1339835893 1.089999e+18 1548710912 HillaryClinton
4 4 1339835893 1.089994e+18 1548709837 HillaryClinton
5 5 1339835893 1.089994e+18 1548709756 HillaryClinton
6 6 1339835893 1.089994e+18 1548709738 HillaryClinton
text
1 On
top of human suffering and lasting damage to our national parks, the Trump
shutdown cost the economy $11 billion. End shutdowns as a political hostage-
taking tactic.
2 Hurricane Maria decimated trees and ecosystems in Puerto Rico. Para La
Naturaleza's nurseries have made a CGI commitment to plant 750,000 trees in
seven years. The team here has already grown 120,000 seedlings and planted
30,000 trees. source display_text_width is_quote is_retweet favorite_count
retweet_count lang
1 Twitter Web Client 192 FALSE FALSE 14324
4168 en
2 Twitter Web Client 235 FALSE FALSE 10684
2526 en
3 Twitter Web Client 238 FALSE FALSE 11423
2089 en
4 Twitter Web Client 34 FALSE FALSE 1293
113 en
5 Twitter Web Client 222 FALSE FALSE 6641
951 en
6 Twitter Web Client 214 FALSE FALSE 12192
2108 en
status_url name
location
Hillary
Clinton New York, NY
Hillary
Clinton New York, NY
description
1 2016 Democratic Nominee, SecState, Senator, hair icon. Mom, Wife, Grandma
x2, lawyer, advocate, fan of walks in the woods & standing up for our
democracy.
2 2016 Democratic Nominee, SecState, Senator, hair icon. Mom, Wife, Grandma
x2, lawyer, advocate, fan of walks in the woods & standing up for our
democracy.
url protected followers_count friends_count listed_count
statuses_count
1 FALSE 24017203 784
41782 10667
2 FALSE 24017203 784
41782 10667
3 FALSE 24017203 784
41782 10667
favourites_count account_created_at verified profile_url
profile_expanded_url
1 1138 1365530675 TRUE
2 1138 1365530675 TRUE
3 1138 1365530675 TRUE
我删除了一些网址列，因为它不支持要发布的网址。如果有人能帮助我解决这个问题，那就太好了。 在此先感谢！