Merging Column

KNIME Analytics Platform
1

Hi

I was trying to organise my data set for some other software using knime and i wanted to move data from col 4 to col 6 , col 7 to col 9 and so and so forth to bring them all directly below col 1 to col 3

for eg
from

to

but with multiple set of 3 col , 28 set i think ?

Thanks for the help.

2

This workflow does what you want, it depends on the columns being in the right order and no additional column there that messes things up. Basically it splits the datasets, reassigned the column headers and concatenates everything back.

You could give it a try.

image
image1592×1060 156 KB

kn_example_three_columns_split.knwf (106.7 KB)

1 Like
3

Hi there!

Here is a solution using Lag Column node combined with case logic in Column Expression nodes.

Within_Table_Concat
Within_Table_Concat981×272 13 KB

2019_04_01_Concatenate_within_table.knwf (28.8 KB)

Br,
Ivan

1 Like
4

Thanks for the help
it work just as i required it haha

i really need to study javascript to understand how the column expression work

1 Like
5

Hi!

Glad it helped. I would say there is really no need to study JavaScript a lot for Column Expressions node. Here is the tutorial I always check when dealing with Column Expressions node because I do not know the JS syntax :smiley:
https://www.w3schools.com/js/

Br,
Ivan

1 Like