I got a column of the form :

```
0           q4
1           4
2           3   
3           1
4           2
5           1
6           5
7           1
8           3

```

The column represents the answers of users to a question of 5 choices (1-5).

I want to turn this into a matrix of 5 columns where the indexes are the 5 possible answers and the values are 1 or 0 according to the user's given answer.

Visualy i want a matrix of the form:

```
0   q4_1  q4_2  q4_3  q4_4 q4_5
1   Nan    Nan   Nan   1    Nan
2   Nan    Nan   1    Nan   Nan
3   1      Nan   Nan  Nan   Nan
4   Nan    1     Nan  Nan   Nan
5   1      Nan   Nan  Nan   Nan

```