Sorting 2 row columns

I have two colums

for example

x=[0.5 0.8 0.9 0.9 0.9 1]

y=[2 1.8 1.6 1.5 1.2 1.1]

I want to obtain this result

x=[0.5 0.8 0.9 1]

y=[2 1.8 1.2 1.1]

The lowest y-value that occurs for the x-value (that occurs multiple times), needs to be sorted.

Answer 1

[Guillaume]

[x, ~, id] = unique(x);
y = accumarray(id, y, [], @min)';

[KL]

+1! Simple and neat!