Vectores em Python

• Matemática: [; \underline{\textbf{v}}=(v_1,v_2,...), \underline{\textbf{w}}=(w_1,w_2,...) \in \mathbb{R}^n ;]
• Python: v=[1,2,3,4]: vx=v[0]
• Classe de Python: list
• Somar Vetores: [; \underline{\textbf{u}}=\underline{\textbf{v}}+\underline{\textbf{w}} ;]
  • Matemática: [; u_i=v_i+w_i ;]
  • Python: for i in range( len(v) ): u.append( v[i]+w[i] )
• Classe Vector herda list

    def __init__(v,w=[]):
        if (w.__class__.__name__=="int"):
            v.__Calloc__(w)
            
        else:
            v.__Calloc__( len(w) )
            for i in range( len(w) ):
                v[i]=1.0*w[i]
        
    def __Calloc__(v,size):
        for i in range(size):
            v.append(0.0)
        
    def __str__(v):
        #Diferentiate print vectors.
        text=[]
        for vi in v:
            text.append( str(vi) )

        return "{"+",".join(text)+"}"