HELP: Representing time domain signal into CLUSTERS

Hi all,

Help would gladly be appreciated for the following:

I have 3 time domain signals
x1(t) = {1......N}
x2(t) = {1......N}
x3(t) = {1......N}

I am applying classification techniques for the identification of these 3 signals, I'm just intrested in finding and learning out that how can I see these signals in terms of clusters.. (How can I see x1(t) in form of clusters ? )

I want to observe this, so I can see how seperate the signals are from one another.
I have used Thornton seperability Index (TSI) as the measure to observe this, but I want to see it visually in clusters...
so I can plot x1(t) in clusters, x2(t) in clusters and x3(t) in clusters.

I was looking so far at k-means clustering algorithm...
Can anyone suggest something more productive and simple

I don't know too much, i can just upload simple examples of using of using K-means and ISODATA algorithms.