Vofun - 4 months ago 40

Python Question

I want to keep adding numpy arrays to another array in python.

let's say I have the following arrays:

`arraytotal = np.array([])`

array1 = np.array([1,1,1,1,1])

array2 = np.array([2,2,2,2,2])

and I want to append array1 and array2 into arraytotal. However, when I use:

`arraytotal.append[array1]`

it tells me:

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

how can I append array1 and array2 into arraytotal?

Answer

You should append the arrays onto a regular python list and then convert the list to a numpy array at the end:

```
import numpy as np
total = []
for i in range(5,15):
thisArray = np.arange(i)
total.append(thisArray)
total = np.asarray(total)
```

That loop makes a 2D array; you'd nest loops to produce higher dimensional arrays.