ValueError operands could not be broadcast together with shapes 3 1000

Question

This is the part of my code, why it shows :ValueError: operands could not be broadcast together with shapes (3,) (1000,)

prets = []
pvols = []
for p in range (2500):
    weights = np.random.random(noa)
    weights /= np.sum(weights)
    prets.append(np.sum(data.mean() * weights) * 252)
    pvols.append(np.sqrt(np.dot(weights.T,
                                np.dot(data.cov() * 252, weights))))
    pret = np.array(prets)
    pvol = np.array(pvols)

Comments

Hey, @Noman,

Could you please mention at which line of code the error you are facing? It will be helpful for me to investigate.

---

ValueError                                Traceback (most recent call last)
<ipython-input-107-7748785c18e9> in <module>
      4     weights = np.random.random(noa)
      5     weights /= np.sum(weights)
----> 6     prets.append(np.sum(data.mean() * weights) * 252)
      7     pvols.append(np.sqrt(np.dot(weights.T,
      8                                 np.dot(data.cov() * 252, weights))))