Hi Guys,

I want to concatenate all these values in the columns enclosed with "" and separated by comma in the order as shown below. How can I get this done in R?

`df1`

```
chr     start      end        strand
chr4    443333     232444     +
chr5    4455332    4433323    -
chr5    4443333    4433355    +
```

I want this result

Result (exactly as shown below):

    "chr4","443333","232444","+","chr5","4455332","4433323","-","chr5","4443333","4433355","+"
    all <- paste(apply(df1, 1, function(row) paste(dQuote(row), collapse=",")), collapse=',"+",')