Sort matrix according to first column in R

Question

I have a matrix with two columns of the following form:

1 349
1 393
1 392
4 459
3 49
3 32
2 94

I would like to sort this matrix in increasi

Answer 1

Be aware that if you want to have values in the reverse order, you can easily do so:

> example = matrix(c(1,1,1,4,3,3,2,349,393,392,459,49,32,94), ncol = 2)
> example[order(example[,1], decreasing = TRUE),]
     [,1] [,2]
[1,]    4  459
[2,]    3   49
[3,]    3   32
[4,]    2   94
[5,]    1  349
[6,]    1  393
[7,]    1  392