Separating a one row matirix into many one row matricies by identifying large spikes

I am trying to find an efficent way to separate my very long, one row matirix into 18 different rows based on jumps in data. for example if

X = [1 1 1.3 1.2 14 13 14.3 5 5.1 5 20 21 20.5]

I would want to divide it into

X1 = [1 1 1.3] X2 = [14 13 14.3] X3 = [5 5.1 5] X4 = [20 21 20.5]

any suggestions would help!

THANKS!

Answer 1

[Cedric]

Here is an example illustrating one way to do it:

 X1 = X(X<5) ;
 X2 = X(X>=10 & X<20) ;
 X3 = X(X>=5 & X<10) ;
 X4 = X(X>=20) ;

Note: if you don't know the thresholds a priori and you need to compute them, we can discuss a solution based on ABS, DIFF, SORT, etc..