Why do I need a Helper when I know the Item?

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Hi there,

Quantrix is logical und structured, and a cool thing. But there is one thing I do not understand, and I’m crossing the same thing in a lot of places, when doing SELECT statements, or in other places. I’m still not sure if my brain is twisted or if it is Quantrix 🙂

I compiled a very simple example to illustrate the point.

In a 3-dim matrix, I want to select one index on one dimension, sum over the second dimension, and do it for all elements in the third dimension.

Easy, as I know the item I want to slice – “S1” – by name.

I do not find a way to do this … not using the item name, not using the descriptor. Everybody is doing this using a helper. Why do I need to convert the address to content, and then search the cell content to get back the address of the cell?? This looks very inefficient to me.

Is there anybody out there who can fix my mind? Or show me how to solve the problem without a helper column (and yes, I know how I can do it if both matricies have the same structure and linked categories, I could sum over all “Sektor”-items, but that’s not what I want to do …

Thanks for your help, Gilbert

gilles Selected answer as best November 18, 2022

Hi Gilbert, try this:

Good luck

gilles Posted new comment January 26, 2023

Dear SAU,
Thank you very much for suggestion. Looks really cool!!
Unfortunately, it gives me just “Syntax error”, without telling me why.

Some questions:
* What does mean to put a category in parathesis (e.g. (Years) )?
* why do you use “slice” – this function was a feature request I suggest to actually solve the problem, but in my universe it is not available.

Very curious … Gilbert

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