numpy - 1 field value in 3d array from a 1d array

Question

I have this issue, I'm trying to build a 3D array where I need later to overwrite eg. [:,:,5] with a value from a 1D array. My arrays look like this in numpy:

3D:

[[[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]

 [[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]

 [[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]

 [[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]

 [[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]

 [[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]

 [[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]

 [[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]

 [[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]

 [[   0.  150.   10.  300.   25.    0.]
  [   1.   25.    2.   75.    7.    0.]
  [   4.    0.    0.    0.    0.    0.]
  [   5.    0.    0.    0.    0.    0.]]]

1D:

[ 1806.    1092.     150.     150.    2669.     150.     150.     150.
   310.    7181.85]

.. and what I want is this:

3d[0][0][5] = 1d[0]
3d[0][1][5] = 1d[0]
3d[0][2][5] = 1d[0]
3d[0][3][5] = 1d[0]
3d[1][0][5] = 1d[1]
3d[1][1][5] = 1d[1]
3d[1][2][5] = 1d[1]
3d[1][3][5] = 1d[1]

and so on. I have been trying somthing like this:

list_product_pricegroup[:,:,5] = migrete_array[:]

without any kind of luck, hope someone can guide me in the right direction.

can you update your code for array creation? please?

Espoir Murhabazi
– Espoir Murhabazi

2018-02-09 08:52:16 +00:00
Commented Feb 9, 2018 at 8:52 — Espoir Murhabazi
– Espoir Murhabazi, Commented Feb 9, 2018 at 8:52

Gerges · Accepted Answer · 2018-02-09 08:54:36Z

2

Your array list_product_pricegroup is 10x4x6 and migrete_array is a 1-D vector of 10. Since you index (5) the array list_product_pricegroup before assignment, it is now a 10x4 matrix. Then you need to promote migrete_array to a 2-D array of size 4x1 to be broadcasted, as such:

list_product_pricegroup[..., 5] = migrete_array[:, None]

answered Feb 9, 2018 at 8:54

Gerges

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4 Comments

ParisNakitaKejser Over a year ago

Thanks, its working close on what i want, but the numbers now going from [[ 0. 150. 10. 300. 25. 0.] [ 1. 25. 2. 75. 7. 0.] [ 4. 0. 0. 0. 0. 0.] [ 5. 0. 0. 0. 0. 0.]]] to [[ 0.00000000e+00 1.50000000e+02 1.00000000e+01 3.00000000e+02 2.50000000e+01 7.18185000e+03] [ 1.00000000e+00 2.50000000e+01 2.00000000e+00 7.50000000e+01 7.00000000e+00 7.18185000e+03]

Gerges Over a year ago

yes, I thought this is how you wanted them to be, according to what I understood from the question

ParisNakitaKejser Over a year ago

yes and no :), i want the value moved to the 5 inx and its true, if i do the same just type static number eg. 1000.0 its working fine, and around 50% work fine but som of the numbers not are moving currect there giving the funny numbers you see when i trying your code of, its only this migrete_array[:, None] part there make troblue now, orter are like this as is shut be [[ 0. 150. 10. 300. 25. 150.] [ 1. 25. 2. 75. 7. 150.] [ 4. 0. 0. 0. 0. 150.] [ 5. 0. 0. 0. 0. 150.]]

ParisNakitaKejser Over a year ago

nevermind, its working i'm trying to print out print(list_product_pricegroup[9][3][5]) and its working as i shut be, thanks a lot :)

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