How to use REDUCEM

Good morning,

I use the following code for reducing 12600 coordinates of a driller's cross section:

elementsize =0.38;
[x_out,y_out] = reducem(punkte_sort(:,1),punkte_sort(:,2),0.1*elementsize);

Unfortunately I just get a line by plotting the reduced coordinates. I already tried to in- and decrease the elementsize but it does not help.

What is my mistake in this content?

Thanks for your help.

Kind regards

niko9310