I have a dataframe of arrays such as:

| A | B | C |
|:---- |:------:| -----:|
| [0,1,2,3]  | [1,2,5,6]    | [0,1,4,5] |
| [0,0,6,3]  | [0,2,0,4]    | [3,8,7,1] |
| [1,0,2,1]  | [0,0,2,0]    | [1,2,1,1] |

I want to convert to get the unique and count values of the whole dataframe.

| value | count |
|------ |------|
|0| 9|
|1| 9|
|2| 6|
|3| 3|
|4| 2|
|5| 2|
|6| 2|
|7| 1|
|8| 1|

Any idea? Thank you!

CodePudding user response：

One option is to use