Merge columns of coordinates and construct sequence
it probably depends on the use of your new generated column. Here I try to reproduce your example: 

x1 &lt;- c(0, 0)
x2 &lt;- c(58.33546, 58.33604)
x3 &lt;- c(15.14554, 15.14571)
df &lt;- data.frame(x1, x2, x3)
df$x4 &lt;- paste("(", as.character(df$x2), ", ", as.character(df$x3), ")")


And df$x4 will look like:

[1] "( 58.33546 ,  15.14554 )" "( 58.33604 ,  15.14571 )"


If you want to show the coordinates, the above format should be fine. If you want to do further analysis with that column, some other transformations are required.