How to create stacked bar chart

elogancrawford

In RM v9.0, we created a stacked bar showing number of observations per region based on 3 different amounts as follows: Group-by 'region', Stacked col 'amount', Legend col 'amount', Value col 'amount', Aggregation 'count'. How do we create this same chart in v9.2? 

Marco_Barradas

Pivot your data.

IngoRM

Hi @elogancrawford

I was running into a similar problem today...  While Pivoting first seems to do the trick indeed, I was also expecting that this should be possible with the new charts alone as well.  However, I was not able to pull it off myself so I am going to tag @Marco_Boeck here.  I am sure he can help you with this (or confirm in case this is a bug...)

Thanks,

Ingo

Marco_Boeck

Hi,

Currently not supported. Aggregating on number columns is disabled because it's very easy to absolutely murder your computer by selecting a column with too many distinct values (as evident when trying to use the old Stacked Bars on a trivially small data set like Titanic and freezing Studio for a good minute when selecting the wrong columns. Imagine doing that on a bigger data set).

Regards,
Marco

sgenzer

ok not a bug but can be a feature request. Let me know if you want me to push it, @IngoRM.

Scott

IngoRM

Hi @Marco_Boeck,

I am not sure if I understand.  When you refer to the "aggregation for numerical column" do you refer to the grouping?  I think the problem is more that for stacked bar chart you may have two grouping columns (one for the groups of bars as usual, the second one for the stacks).  See the screenshot below.  Here two categorical columns are used for the groups and the stacks and the numerical column is averaged... Or did I misunderstand this?

Anyway, this can be achieved by Pivoting first.  Excel is doing the same BTW.  Personally I do not need a feature request for, although I must admit that this was indeed a bit comfortable to achieve with the old charts.  But other than that I actually like the new charts quite a lot BTW!

Cheers,

Ingo

Marco_Boeck

Hi Ingo,

Yep, I know you'd need two grouping columns here. We don't offer that (yet) for bar/line charts, but allowing that is certainly possible in the future. But even then, the numerical grouping problem remains, which ultimately will prohibit this in the new charts I think. That's why I mentioned it

Regards,
Marco

sgenzer

Personally I do not need a feature request...

LOL yeah I guess you don't @IngoRM

Marco_Boeck

Hi,

Good news! This feature will make a return in RapidMiner Studio 9.3
Both the existing "Group by" and the new "Color Group" will then work on any column type (be it numerical, nominal, or datetime), to offer maximum flexibility.
This is how it'll look like:



Regards,
Marco

IngoRM

This is AWESOME!  Thanks @Marco_Boeck

And BTW: I like the idea with the white bar on the left side indicating which parameters belong to the aggregation

harsha6055

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