Curve smoothing using smooth

I have been reading doc smooth and have the following to code to carry out smoothing.However, when I run it, its just the heading I have.

>> x=xlsread('H2T_1.xls',1,'Z843:Z1053');
>> y=xlsread('H2T_1.xls',1,'AA843:AA1053');
>> yy1 = smooth(x,y,0.1,'loess');
yy2 = smooth(x,y,0.1,'rloess');
>> [xx,ind] = sort(x);
subplot(2,1,1)
plot(xx,y(ind),'b.',xx,yy1(ind),'r-')
set(gca,'YLim',[-1.5 3.5])
legend('Original Data','Smoothed Data Using ''loess''',...
       'Location','NW')
subplot(2,1,2)
plot(xx,y(ind),'b.',xx,yy2(ind),'r-')
set(gca,'YLim',[-1.5 3.5])
legend('Original Data','Smoothed Data Using ''rloess''',...
       'Location','NW')

Can anyone help and guide, whats wrong?

Answer 1

[Tom Lane]

It works just fine for me, if I make up random data. Try looking at x, y, yy1, and yy2. If that doesn't make it clear what went wrong, you'll have to supply more details.