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The second dimension... or how to use secondarydimensionality()

The second dimension... or how to use secondarydimensionality()

Prologue...

Firstly I would like to say that probably it would be easier to call this function Horizontal Dimensionality (or HDim or even SecDim)

This could clear some clouds - when you first see this function you may feel that this another level for dimensionality function.

(for those who wants to know more about the dimensionality function please see this document

How to use - Dimensionality()


What it is used for?

Returns the number of dimension pivot table rows that have non-aggregation content. i.e. do not contain partial sums or collapsed aggregates. This function is the equivalent of the dimensionality function for horizontal pivot table dimensions.

The secondarydimensionality() function always returns 0 when used outside of pivot tables.

What does it mean?

Where dimensionality shows number of vertical dimensions, secondarydimensionality shows  number of horizontal dimensions.

Lets take our sample data.

We have four dimensions(columns):

Product,Category,Type and Sales.

Each Product have 2 Categories

Each Category can have up to 3 Types

Let's create Pivot Table using 3 of those Dimension Product,Category and Type and use  Sales as our Expression.

This Pivot Table  has 3 dimensions so its maximum dimensionality is 3.


'Sugar' has dimensionality of 1 which is Total for that 'Product'.

'Salt' has dimensionality of 2 which is Total for each 'Category' of that 'Product'.

'Oil' has dimensionality of 3 which is single value for each 'Type' of the 'Product's' 'Category'


So in few words : secondarydimensionality (and dimensionality) is the number of dimensions used in a Table


For better understating please see  table below:


The function is used to show on which dimensionality level each of the Pivot Table row is:


Practical use:

1) To show the level of dimensionality:

Expression:

if(secondaryDimensionality()=1,RGB(151,255,255),if(secondaryDimensionality()=2,RGB(0,238,0),

if(secondaryDimensionality()=3,RGB(255,130,171))))


2) Highlight background of rows which on each level  fall into certain condition:

Expression:

if(Dimensionality()=1 and sum(Sales)<150,RGB(151,255,255),if(Dimensionality()=2 and sum(Sales)<=20,RGB(0,238,0),if(Dimensionality()=3 and Sum(Sales)<=20,RGB(255,130,171))))

LEVEL 1 --> Values <35LEVEL 2 --> Values <=15LEVEL 3 --> Values <=20

Remember ligtbulb.jpg

  • To use the script below the Excel file must be saved in the same folder that your qvd file

        Otherwise you will need to make changes the this path - secondarydimensionality.xlsx


Directory;

LOAD Product,

     Category,

     Type,

     Sales

FROM

secondarydimensionality.xlsx

(ooxml, embedded labels, table is Sheet1);

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Comments
mithilesh17
Contributor II

Tricky to understand,but got it finally. Thanks Robert_Mika‌ again as always!

You are welcome.

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lubicz99
Valued Contributor

Never a day, I don't learn something new about Qlikview.  Thanks for sharing Robert.

Nice document with examples

harsh44_bhatia
Contributor

Another use case of secondarydimensionality() Function:

:

https://community.qlik.com/message/982529#982529

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Not applicable

Another good use of function

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pandunallani
Contributor II

Good analysis, I suggest look dimentionality() , given link in the present document to better understand

secondarydimensionality().

Reagards

Pavan N

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v_petrenko
New Contributor III

Excellent article, Robert, but I couldn't resist of removing the following categories that it shouldn't belong to. Just for keeping their contents as clean as possible.

Deployment

Developer Toolkit

Direct Discovery

Integration

Management

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Last update:
‎02-22-2015 06:38 PM
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