sort a matrix in a specific way

Dear All, Although I know how to sort a single column or row in an ascending or descending way, but I do not know how to sort a higher dimension matrix based on a single column. I hope the following example illustrate my point:

     12 0 1 65
     5  1 0 340
     13 2 1 100
     9  0 0 0

I need the matrix to be sorted based on the first column. Basically I need all rows to be sorted based on a simple sort on the first column. Here is the desired output:

    5 1 0 340
    9 0 0 0
    12 0 1 65
    13 2 1 100

I hope you will help me to figure how to sort it out! Thank you so much HRJ

Answer 1

[Stephen23]

You can use sortrows for this:

>> A = [12,0,1,65; 5,1,0,340; 13,2,1,100; 9,0,0,0]
A =
    12     0     1    65
     5     1     0   340
    13     2     1   100
     9     0     0     0
>> sortrows(A,1)
ans =
     5     1     0   340
     9     0     0     0
    12     0     1    65
    13     2     1   100

[Homayoon]

Thanks. I was not aware of this syntax I do appreciate your help

[Stephen23]

My pleasure. You can also Accept an answer that resolves your question.