1
我有从中删除了符号系统的Facebook文章列表。现在我留下了文本之间的空白 - 我想浓缩两个或更多空间。如何删除多余的空格，以便在单词之间只有一个空格？另外，如何删除文本中所有大写字母呢？将单词之间的空格缩小为1个单词之间的空格
> head(posts)
[1] "Syntel Recruitment Drive in this week for FRESHERS New Registration Link 2016 for 2013 2014 2015 Passout Graduates Qualification Any Graduate B E B Tech MCA M E M Tech Syntel Registration Link"
[2] "Dont Miss This Opportunity to be get placed in one of the best MNC companies in the world eBay freshers this week of January 2016 Qualification Any Graduate Can Apply eBay Registration Link"
[3] "Recent Pass Outs with 55 or More are eligible to Apply in Wipro Go to the Updated Link for LastDay Reference Drive Jan 2016 Apply Link for Fresher Referral Apply Link"
[4] "Robert Bosch Recruitment Drive in this week for FRESHERS New Registration Link 2016 for 2013 2014 2015 Passout Graduates Qualification Any Graduate B E B Tech MCA M E M Tech Robert Bosch Registration Link"
[5] "Mega JOB OPENINGS OF THE YEAR Mphasis Recruitment for FRESHERS January 2016 Qualification BE B Tech B Sc BCA Any Graduates MCA MBA ME M Tech Post Graduates Mphasis Registration Link"
[6] "TRIGENT Recruitment Drive in this week for FRESHERS New Registration Link 2016 for 2013 2014 2015 Passout Graduates Qualification Any Graduate B E B Tech MCA M E M Tech Trigent Registration Link"
> dput(head(posts))
c("Syntel Recruitment Drive in this week for FRESHERS New Registration Link 2016 for 2013 2014 2015 Passout Graduates Qualification Any Graduate B E B Tech MCA M E M Tech Syntel Registration Link",
"Dont Miss This Opportunity to be get placed in one of the best MNC companies in the world eBay freshers this week of January 2016 Qualification Any Graduate Can Apply eBay Registration Link",
"Recent Pass Outs with 55 or More are eligible to Apply in Wipro Go to the Updated Link for LastDay Reference Drive Jan 2016 Apply Link for Fresher Referral Apply Link",
"Robert Bosch Recruitment Drive in this week for FRESHERS New Registration Link 2016 for 2013 2014 2015 Passout Graduates Qualification Any Graduate B E B Tech MCA M E M Tech Robert Bosch Registration Link",
"Mega JOB OPENINGS OF THE YEAR Mphasis Recruitment for FRESHERS January 2016 Qualification BE B Tech B Sc BCA Any Graduates MCA MBA ME M Tech Post Graduates Mphasis Registration Link",
"TRIGENT Recruitment Drive in this week for FRESHERS New Registration Link 2016 for 2013 2014 2015 Passout Graduates Qualification Any Graduate B E B Tech MCA M E M Tech Trigent Registration Link"
)