Automatic scale for bar chart with several expressions

[#1]

Hi,

I am trying to do a gant-like chart.

My data are like this :

PROJECT	PROJECT_TYPE	START_DATE_TYPE_1	END_DATE_TYPE_1	START_DATE_TYPE_2	END_DATE_TYPE_2
A	1	01/01/2012	01/02/2012
A	2			01/03/2012	01/04/2012
B	1	01/03/2012	15/05/2012
B	2			18/02/2012	10/03/2012

If I try to do a bar chart :

dimension PROJET&PROJECT_TYPE

expression sum( if( PROJECT_TYPE = 1, END_DATE_TYPE_1 - START_DATE_TYPE_1 ))

with an offset sum( if( PROJECT_TYPE = 1, START_DATE_TYPE_1 ))

unchecking forced0

IT IS OK

Idem if I do the same for TYPE2

BUT if I have 2 expressions (one for type 2 and one for type 1) then the min value of the scale is 01/01/1900 and max value is 01/01/2020

Does someone know why ?

Thanks a lot

I attach a doc.

[Gysbert_Wassenaar · Accepted solution]

You didn't format your dates so 01/01/2012 is interpreted as 1 divided by 1 divided by 2012. And thats a very small number. When that small number is interpreted as a date you end up near the start of the calendar, i.e. in 1900. See attached qvw.

[#3]

Thank you very much Gysbert !!

How do you explain that each one of my expression is correctly interpreted, but when both are activated it doen"t work ?

[#4]

Any idea ?

Because even if you example work, i'm stuck with my real data

[#5]

OK

I see that in addition to force the date format, you also defined a static min.

If i remove that static min, your chart has the same problem as mine : the scale is OK with 1 expression, and is screwed with 2.

So I guess it is a QV bug.