topic Re: Colors with Custom Expression on Null values in App Development

Colors with Custom Expression on Null values

joshakehurst — Thu, 14 Sep 2017 21:13:32 GMT

I would like to use a custom expression to display a Green/Red color output on a donut chart, but nothing is working. I define anything null in the field as 'Unassigned' otherwise 'Assigned'. Here are the expressions involved.

Dimension

=if(IsNull([Resolution]), 'Unassigned', 'Assigned' )

Colors and Legend

=if(IsNull([Resolution), RGB(72,196,117), RGB(231,97,74))

Also tried

=if(IsNull([Resolution]), RGB(72,196,117), if(Not isNull([Resolution]), RGB(231,97,74), RGB(0,0,0)))

The only color displayed is Green (Not red for the Unassigned/Null values)

Re: Colors with Custom Expression on Null values

shraddha_g — Fri, 15 Sep 2017 05:06:22 GMT

try,

Pick(wildmatch(if(IsNull([Resolution]), 'Unassigned', 'Assigned' ), 'Unassigned', 'Assigned'),

RGB(72,196,117), RGB(231,97,74)

)

Re: Colors with Custom Expression on Null values

Neymar_Jr — Fri, 15 Sep 2017 07:20:59 GMT

Hi Josh, Shraddha,

I am not sure why both of your expressions are not working.May be you can make some change to the load script.

Please check the attached app.

Cheers.

Re: Colors with Custom Expression on Null values

shraddha_g — Fri, 15 Sep 2017 07:34:10 GMT

Once you use this in Load script you don't have to apply isnull() again in front end.

if you are using

if(IsNull([Resolution]), 'Unassigned', 'Assigned' ) as Resolution

in Load script.

You color by expression changes to pick(wildmatch(Resolution, 'Unassigned', 'Assigned'),

RGB(72,196,117), RGB(231,97,74)

)

Check Rajesh's modified app

Re: Colors with Custom Expression on Null values

Neymar_Jr — Fri, 15 Sep 2017 07:36:07 GMT

Or may be this -

Dimension - Aggr(if(isnull([Resolution]),'Unassigned','Assigned'),[Field])

and in the color by expression -

if(Aggr(if(isnull(Resolution),'Unassigned','Assigned'),[Field])='Unassigned',RGB(72,196,117), RGB(231,97,74))

Re: Colors with Custom Expression on Null values

joshakehurst — Fri, 15 Sep 2017 14:32:50 GMT

This is a very strange approach, but it works. Thanks for the tip.