topic Max Function and respective Date on Chart in QlikView

Max Function and respective Date on Chart

Wed, 05 Oct 2011 16:43:45 GMT

Hi All,

I have a chart which has data like this

Name	val	start dt	end dt
Jon	100	09/23/2011 10.15 AM	09/23/2011 10.30 AM
Jon	200	09/23/2011 10.35 AM	09/23/2011 10.45 AM
Jon	300	09/23/2011 10.48 AM	09/23/2011 10.55 AM
Jon	400	09/23/2011 11.00 AM	09/23/2011 11.30AM

I need to create another chart which can show the max value and the time of occurance

Name	max-val	start dt	end dt
Jon	400	09/23/2011 11.00 AM	09/23/2011 11.30AM

In the chart I used name as dimension and created an expression max(val) which provides 400,But I am not sure how to bring the corresponding start time and endtime.This needs to be handled on the Chart.

Anyone can help?

Thanks..

Max Function and respective Date on Chart

Wed, 05 Oct 2011 19:12:10 GMT

maybe something like this for your expressions:

Only({$<Value = {"$(=Max(Value))"}>} startDate)

Only({$<Value = {"$(=Max(Value))"}>} endDate)

Max Function and respective Date on Chart

Wed, 05 Oct 2011 19:57:46 GMT

Thanks for the answer..

if there are multiple names and I need to find max(val) for each name and corresponding startdatetime and enddatetime then above answer needs a tweak.

need to show in the chart

jon 400 9/23/2011 11AM 9/23/2011 11.30 AM

Kim 500 9/25/2011 9.50 AM 9/23/2011 10.55 AM

above answer only helps me to show Kim's value because that is highest between Jon and Kim.

if anyone can help on this would be apprecited.

Max Function and respective Date on Chart

Wed, 05 Oct 2011 21:10:32 GMT

So I made variables for the max of each name. I used Bob, Joe and Jose. So for someone named Bob:

vMaxBob: =Max({1<Name = {'Bob'}>} Value)

Then within the chart have on expression for the Max:

aggr(Max(Value), Name)

Then for the date start have:

if(Name = 'Bob', ONLY({$<Value = {$(=vMaxBob)}>} DateS),

if(Name = 'Joe', ONLY({$<Value = {$(=vMaxJoe)}>} DateS),

if(Name = 'Jose', ONLY({$<Value = {$(=vMaxJose)}>} DateS),

)))

and date end:

if(Name = 'Bob', ONLY({$<Value = {$(=vMaxBob)}>} DateE),

if(Name = 'Joe', ONLY({$<Value = {$(=vMaxJoe)}>} DateE),

if(Name = 'Jose', ONLY({$<Value = {$(=vMaxJose)}>} DateE),

)))

That may be a bit clunky for what you need especially if you have a lot of names but it should work to display the info you need.

Max Function and respective Date on Chart

Wed, 05 Oct 2011 21:34:23 GMT

Thanks for your answer.I cannot go with this as there are more than 200 names in the table.Do you think any thing can be done thru script instead of chart?

Re: Max Function and respective Date on Chart

Thu, 06 Oct 2011 04:48:23 GMT

Try somethin like this in your script:

maxVal:

load Name, max(val) as MaxVal, lastvalue([start dt]) as LastStartDt, lastvalue([end dt]) as LastEndDt

resident YourDataTable group by Name;

Max Function and respective Date on Chart

Thu, 06 Oct 2011 15:57:52 GMT

I used this and got it to work:

Test:

LOAD * INLINE [

NameID, Name, Value, DateS, DateE

1, Bob, 400, 01/01/2011, 02/22/2020

1, Bob, 200, 01/03/2011, 02/25/2020

2, Joe, 250, 02/05/2012, 01/22/2000

2, Joe, 300, 02/15/2012, 02/18/2020

3, Jose, 400, 02/12/2014, 05/25/2025

3, Jose, 600, 01/01/2010, 03/22/2010

3, Jose, 100, 01/05/2012, 02/02/2018

];

Test2:

LOAD

Name,

Max(Value) as MaxVal

Resident Test

GROUP BY Name;

Join(Test)

Load

Name,

MaxVal

Resident Test2;

DROP Table Test2;

Test3:

Load

Name,

Value as MaxValue,

DateS as DateStart,

DateE as DateEnd

Resident Test

WHERE Value = MaxVal;

Then use Name as your dimension and MaxValue, DateStart, and DateEnd as your expressions.