data-science-and-ml

[naive cairn]

please help me find out the tutorials or courses online that how to integrate all model ml into the web app or create my own ml from scratch. I will appreciate

[viscid bridge]

myArr = np.zeros(0)
hana= [1,34,45,64,342,57,345,234]
for i in range(0,4):
    myArr=np.append(hana,hana[i])
print(myArr)

i only want to add 1,34,45,64 to the array myArr but when i run this why does it adds all the value to the myArr array . Somebody help plze.

[wooden sail]

the problem is in the loop. you're replacing myArr with a concatenation of hana with an item in hana, and in the next iteration you delete this result and compute a new concatenation of hana with a different item

[viscid bridge]

can you give the correct syntax please

[viscid bridge]

.

[wooden sail]

based on your code,

import numpy as np
myArr = np.zeros(0)
hana= [1,34,45,64,342,57,345,234]
for i in range(0,4):
    myArr=np.append(myArr,hana[i])
print(myArr)

but honestly this is not what you want to do. you'd really do this instead

import numpy as np
hana= [1,34,45,64,342,57,345,234]
myArr = hana[0:4]

with slice notation

oops i forgot to make the change in the first block of code. i fixed it now

[viscid bridge]

actually in my case i only want specific values of i from a loop

i'll give you that part of code as well just a sec

for i in range (0,688128):
    if flat_gt[i]==255:
        W_val_hs= np.append(flat_hs,[flat_hs[i]])

[wooden sail]

that has the same mistake

[viscid bridge]

so in this case how do i take only a specific set of value of i ?

[viscid bridge]

here slicing won't work right so how do i make sure i get only specific value and not all

[wooden sail]

i'd do something like ```py
In [7]: W_val_hs = np.array([0, 100, 255, 255, 3, 255])

In [8]: hana = np.array([ 300, 12039, 43, 93, 123, 34 ])

In [9]: hana[ W_val_hs == 255 ]
Out[9]: array([43, 93, 34])

which is more general than slicing. so-called "fancy indexing", which is great with numpy because operations easily broadcast over arrays

[lapis sequoia]

pip install