r - extracting hashtags from tweets -

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i trying perform sentiment analysis , facing small problem. using dictionary has hashtags , other junk value(shown below). has associated weight of hashtag. want extract hashtags , corresponding weight new data frame. there easy way it? have tried using regmatches, how giving output in list format , messing things up. input:

            v1    v2 1    #fabulous 7.526 2   #excellent 7.247 3      superb 7.199 4  #perfection 7.099 5    #terrific 6.922 6 #magnificent 6.672

output:

            v1    v2 1    #fabulous 7.526 2   #excellent 7.247 3  #perfection 7.099 4    #terrific 6.922 5 #magnificent 6.672

this code should work , give desired output data.frame 

 input<- data.frame(v1 = c("#fabulous","#excellent","superb","#perfection","#terrific","#magnificent"), v2 = c("7.526",  "7.247" , "7.199", "7.099",  "6.922", "6.672"))   extracthashtags <- input[which(substr(input$v1,1,1) == "#"),]  view(extracthashtags)

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