Re: Sporadically sampled data

[Shaun Jackman]

Jaroslav Hajek wrote:
> On Thu, Jun 19, 2008 at 8:53 PM, Shaun Jackman <address@hidden> wrote:
> > I have data sampled sporadically from a function x = f(t); I have vectors t and
> > x. Does Matlab have any functions to deal with sporadically sampled data?
...
> If you don't need to smooth the data, then you can simply use the
> interpolating functions (interp1, spline, pchip), assuming your data
> is 1-dimensional.
> For smoothing data, you can use OctaveForge packages - data-smoothing, octgpr.

Thanks, Jaroslav. interp1 and pchip helped a lot.

If I have the same arrays of t and x, and now t has duplicate values, how can I 
smooth this data? A more specific question: how can I generate new arrays 
t_mean and x_mean where each value of t_mean is unique, and the value of x_mean 
for each t_mean is the mean value of all the values of x at that value of t?

Thanks,
Shaun