Removing '-' from chart

[#1]

Hello

I've got a problem with a pie chart.

My dimension code is: =IF(not(Field1 = 'string'), Field2)

Expression code is just sum of field: SUM(field)

Everything works fine, but there's a '-' value, which represents values of (Field1 = 'string') from dimension.

Is there any way to remove these values from this chart?

[MK_QSL · Accepted solution]

Under dimension tab, tick suppress when value is null for this calculated dimension.