Calculate the signaling pattern of secreted proteins based on their activities.
     
    
    Usage
    SecAct.signaling.pattern(SpaCET_obj, scale.factor = 1e+05, k = 3)
 
    
    Arguments
    - SpaCET_obj
- A SpaCET object. 
- scale.factor
- Sets the scale factor for spot-level normalization. 
- k
- Number of patterns for NMF. 
 
    
    
    Examples
    SpaCET_obj <- SecAct.signaling.pattern(SpaCET_obj, k=3)