Name columns

[madegomez]

Hello!
I have been working with the Document Vector node … and I have a doubt.
I want to extract the name of the columns (hence the terms) to a table … in order to bring the terms (and the order in which they are extracted) a python node.

I also have this question … if I have in a table the names of the columns, there is some simple way to assign each name to the columns of a new table … I know that it exists in the Rename Column node but this allows me to do it column by cloumna , and the truth is many columns to do it manually. Some help?

Thanks for the help,

Manuela

[armingrudd]

Hi @madegomez,

I have found the topic(s) below similar to your question. Maybe it’s worth to take a look.

Multiplying multiple columns with different columns in a table

Hi Everyone, I have a table with columns like Var1, Var2, Var3…Var10 and I also have some value in columns like Var1_coeff, Var2_coeff,Var3_coeff…Var10_coeff. I want to multiply and creates columns like Final_Var1, Final Var2…Final_Var 10 by multiplying corresponding columns FOr. e.g., Final_Var1 = Var1 x Var1_coeff Final_var2 = Var2 x Var2_coeff … … Final_var10 - Var10 x Var10_Coeff. I can achieve this task using Column loop, rename flow, and R snippet. However, I want your help in if I…

Best,
Armin

[MH]

I think you could either do it in Python directly. I think you would get the column names with input_table.columns.values.tolist().

Or within Knime you could use the “Extract Column Header” Node.

[madegomez]

Thanks! This has been very helpful

[madegomez]

You have a great idea! Thanks.