Help: sort a m by n matrix

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0 个投票

Hi,

I have a 4 by 2 matrix. c=[2205 300; 7281 300; 3535 600; 5944 600] and want to sort the 1st colum and the 2nd colum by the 1st one. The result I want to obtain is a 4 by 2 matrix like this c'= [2205 300; 3535 600; 5944 600; 7281 300].

I also wrote a script to do it. For convenience, is there a buit-in function MATLAB to do it?

My script:

for i=1:size(c,1)
    if i<size(c,1)
    if c(i,1)>c(i+1,1)
        xiold=c(i,1)
        xi1old=c(i+1,1)
        yiold=c(i,2)
        yi1old=c(i+1,2)
        c(i,1)=xi1old
        c(i+1,1)=xiold
        c(i,2)=yi1old
        c(i+1,2)=yiold
      end
      end
  end