topic Calculating frequency percentage by category in Visual Analytics 8.5 in SAS Visual Analytics

Calculating frequency percentage by category in Visual Analytics 8.5

JohnDooris — Tue, 10 Nov 2020 22:01:57 GMT

Hi all,

I am brand new to SAS Visual Analytics, so forgive me if there is an obvious answer to this question that I have missed (but I have searched this forum and have not found an answer). I am creating a stacked bar chart displaying the race/ethnicity (group) of a population over a 5 year period (category includes five values: 2015, 2016, 2017, 2018, 2019). I am displaying the frequency as my measure, but I would like the end user to be able to also see the frequency percent as a data tip. However, when I select frequency percent as a data tip value, the percentage is being calculated using the entire dataset's number of observations (all five years) as the denominator. What I want is to display the frequency percent using each distinct category's observations (i.e., each year's observations) as the denominator.

Someone posted a similar question to this forum and the response was to select "Normalize groups to 100%" in the options. While this does show the correct frequency percent (by year), it's not an ideal solution, because I lose the ability to visualize the magnitude of raw growth over time. I am attaching a screenshot of the problem below. For example, I want the frequency percent in the data tip to calculate the percentage of the Asian population in the Fall 2017 term as 596/6,688=8.9%, but the frequency percent is currently using the entire number of observations in the dataset (6,502+6,541+6,688+6,874+7,177) as the denominator.

Appreciate any help!

Thank you,

John

Re: Calculating frequency percentage by category in Visual Analytics 8.5

PetriRoine — Fri, 13 Nov 2020 05:25:12 GMT

Hello @JohnDooris

Welcome to our community! Yes, this is easily doable with the AggregateTable operator which you use to fix the aggregation to Term level.

For more information about AggregateTable: https://communities.sas.com/t5/SAS-Communities-Library/SAS-Visual-Analytics-Advanced-Calculations-part-2-of-4/ta-p/538541

Here's the New Calculated Item view:

Here's the code:

Sum [_ByGroup_] ('Population'n) / AggregateTable(_Sum_, Table(
_Sum_, Fixed('Term'n), 'Population'n))

And here's how it looks:

I hope this helps 😃

Best regards,

Petri

Re: Calculating frequency percentage by category in Visual Analytics 8.5

JohnDooris — Thu, 12 Nov 2020 15:44:28 GMT

Thank you @PetriRoine !