Program sfdsmooth | Multi-dimensional triangle smoothing - derivative. 
[SYNOPSIS]
sfdsmooth < in.rsf > out.rsf ider=0 repeat=1 nderiv=6 rect#=(1,1,...)
[PARAMETERS]
int     | ider | =0 |   | 	direction of the derivative (0 means no derivative) 
int     | nderiv | =6 |   | 	derivative filter accuracy 
int     | rect# | =(1,1,...) |   | 	smoothing radius on #-th axis 
int     | repeat | =1 |   | 	repeat smoothing several times 
[DIRECTORY]
system/generic
