HOW CAN I MULTIPLY VALUES IN JUST ONE COLUMN?

Hi everyone,

I should multiply all the values of the column "Var4" for those values:" x10x0.5" ; how could I do it?

Thank you very much.

[Iñigo Escanciano]

Just use indexing to choose, and multiply it by your variable. If you want the product for each element of an array, use a dot.

[Pul]

For i=1:136440
    Var4(i)=10.x0,5
end

Like this?

[Iñigo Escanciano]

In this case you have a timetable, which is a specific table type, but still a table. Therefore, you should check how to access data in tables.

In the link there are a lot of examples, you can choose whichever is best for you. I could simply give you one answer but getting it yourself is the best way as it is a basics question.

[Pul]

Yes, you're right.

Thank you.

Answer 1

[KSSV]

It looks like you have a table. If T is your table and you want to multiply 3 and 4 th column.

iwant = T.(3).*T.(4) ; % .* <-- element by element multiplication 

[Pul]

I don’t have to multiply 2 columns. I have to multiply a column (var4) x 0.5 x 10!

[KSSV]

T.(3) = T.(3)*0.5*10 ;

[Iñigo Escanciano]

As what we are looking for is the 4th column variables, being stored in a table, you have 4 options:

Specifying the 4th column of your table

giulia_TT.(4) * 0.5 * 10

Specifying the column name

giulia_TT.Var4 * 0.5 * 10

Accessing it like a matrix (curly bracket indexing for tables)

giulia_TT{:,4} * 0.5 * 10

Mixed way, specifying the column name with curly bracket indexing

giulia_TT{:,'Var4'} * 0.5 * 10

[Pul]

Got it.

Thank you very much!