Hi,

I'm trying to create a numpy v-stack and creating 3 np.array's for it, by filling them with a loop:

I get the error: 'AttributeError: 'numpy.ndarray' object has no attribute 'np' . I think I'm using the wrong notation to append to the empty arrays:

neighbor_id = [id_ for id_ in range(1, n_obs) if id_ != user_id]

neighbor_id_arr = np.array(neighbor_id)

similarity = np.array([])

num_interactions = np.array([])

# get similarity and num_interactions

for id_ in neighbor_id:

similarity.np.append(np.dot(user_item.loc[user_id],user_item.loc[id_])) #The issue is here, I think

num_interactions.np.append(user_interactions.loc[id_])

c = numpy.vstack((neighbor_id_arr, similarity,num_interactions))

Thanks!
James

https://imgur.com/gallery/yAdAjdx

Hello,

Linked is the screenshot of the two error messages I keep recieving as well as the code leading up to it. I'm trying to run an uplift on a classification tree. Any help is appreciated, I am still fairly new to python. Thank you!!

Recoding Variables
"
#I need to recode variables given there are "5" responses present on a 4-point scale
scldict = {1:1,2:2,3:3,4:4,5:'NaN'}
w1array = np.array(week1)
w1vec = w1array.vectorize(scldict)
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-92-e3f6056d2727> in <module>()
      2 scaldict = {1:1,2:2,3:3,4:4,5:'NaN'}
      3 w1array = np.array(week1)
----> 4 w1vec = w1array.vectorize(scaldict)

AttributeError: 'numpy.ndarray' object has no attribute 'vectorize'

Hello world, I am trying to recode variables given there are invalid responses in my survey data. I am using a dictionary and the vectorize function (seen on StackOverflow) to do this. Why is the vectorize function not available? I am lost.

Any help or suggestions for recoding variables in an efficient manner would be appreciated.

I need help. This is the code which gives error:

import numpy as np

num = 3

X_new = np.array([])

for i in range(1, num+1):

print('Enter the', i, '. data:')

n = float(input())

X_new.append(n)

print('\n', X_new)

And this is the error:

AttributeError: 'numpy.ndarray' object has no attribute 'append'