R: How can I delete rows if an element in a row satisfies certain characteristic?
I am trying to figure out a way to delete rows of matrix if a cell in that row satisfies a certain characteristic. For example:

    > mm <- matrix(c(1,2,3,2,3,4,1,2,3,4),5,2)
    > mm
         [,1] [,2]
    [1,]    1    4
    [2,]    2    1
    [3,]    3    2
    [4,]    2    3
    [5,]    3    4

I want to delete rows if the 1st column element in that row is 2. At the end I want this:

  

       [,1] [,2]
    [1,]    1    4
    [2,]    3    2
    [3,]    3    4

How could I do this?

And what about a more general method if instead of deleting all rows who's first column element is 2, I needed to delete rows who's first column element corresponds to a set of numbers that are contained in a list? For example

    delete_list <- c(2,3)

What is the best way to do this?

Thank You in advance.
R: How can I delete rows if an element in a row satisfies certain characteristic?
===

I am trying to figure out a way to delete rows of matrix if a cell in that row satisfies a certain characteristic. For example:

    > mm <- matrix(c(1,2,3,2,3,4,1,2,3,4),5,2)
    > mm
         [,1] [,2]
    [1,]    1    4
    [2,]    2    1
    [3,]    3    2
    [4,]    2    3
    [5,]    3    4

I want to delete rows if the 1st column element in that row is 2. At the end I want this:

  

       [,1] [,2]
    [1,]    1    4
    [2,]    3    2
    [3,]    3    4

How could I do this?

And what about a more general method if instead of deleting all rows who's first column element is 2, I needed to delete rows who's first column element corresponds to a set of numbers that are contained in a list? For example

    delete_list <- c(2,3)

What is the best way to do this?

Thank You in advance.