MATLAB: Please help me in sort row

sort

I have a row,
x = [0 0 0 0 0 40 40 -40 -40 -40 -40 -40 -40 80 80 80 80 80 80]; x1=x;
[xi, u_x] = hist(x1, unique(x1));
output,
 u_x =
   -40     0    40    80
 xi
 xi =
     6     5     2     6
but i want to sort this according to given x,
 [0 40 -40 80]
and
 [5 2 6 6]
should be output of both x_u and x_i respectively. please help me.

Best Answer

x = [0,0,0,0,0,40,40,-40,-40,-40,-40,-40,-40,80,80,80,80,80,80];
[uni,idu] = unique(x);
[cnt,idx] = hist(x,uni);
[~,ids] = sort(idu);
cnt = cnt(ids)
idx = idx(ids)
and the outputs:
cnt =
   5   2   6   6
idx =
    0   40  -40   80
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