topic Re: Loop with customized decimal increment in QlikView

Loop with customized decimal increment

Fri, 04 Dec 2015 23:12:42 GMT

Hi,

This is a sample data set.

Stores	min	max
1	240	243
2	89.1	89.17

I want to create a continuum of values ranging from min to max for each store. So for Store 1, the values will be 240, 241, 242, 243. And for store 2, they will be 89.10, 89,11, 89.12,,....., 89.17.

I am writing a loop. However, the increments are in integers. How can I force the loop to increase by 0.01 for stores whose minimums are left in decimals? Here's my current code:

LET vNumRows = NoOfRows('C'); //// C is a previously created table

For Counter = 1 TO $(vNumRows)

let vstoreLkup = Peek('store',$(Counter)-1,C);

let vmin = Peek('min',$(Counter)-1,C);

let vmax = Peek('max',$(Counter)-1,C);

IF vmin=round(output) THEN ////// output field is original. Some stores (like store 1) need to be rounded to get the min. Others (store 2) are left in decimals

For vcontinuum = $(vmin) to $(vmax)

Concatenate(Data)

load

'$(vstoreLkup)' as store,

'$(vcontinuum)' as continuum,

'$(vmin)' as min,

'$(vmax)' as max,

AutoGenerate 1;

ELSE

For vslider = $(vmax) to $(vmin) /////Here is where I need to force the increments to be in decimal, I am thinking.

Concatenate(Data)

load

Concatenate(Data)

load

'$(vstoreLkup)' as store,

'$(vcontinuum)' as continuum,

'$(vmin)' as min,

'$(vmax)' as max,

AutoGenerate 1;

ENDIF

Appreciate the help. Thank you.

Saad

Re: Loop with customized decimal increment

cwolf — Sat, 05 Dec 2015 00:00:44 GMT

What about using a macro like;

Function getContinuum (min,max)

b=false

s=min & ";"

if( int(min)<>min or int(max)<>max) then

min = min * 100

max = max * 100

b=true

end if

do while min<max

min = min +1

if b then

s=s & min/100 & ";"

else

s=s & min & ";"

end if

loop

getContinuum=left(s,len(s)-1)

end function

Then in script:

LOAD

getContinuum(min,max) as continuum

Resident C;

Re: Loop with customized decimal increment

cwolf — Sat, 05 Dec 2015 00:23:48 GMT

or a little bit better:

Function getContinuum(min,max)

b=false

s=min & ";"

if( int(min)<>min or int(max)<>max) then

b=true

end if

do while min<max

if b then

min = min + 0.01

else

min = min + 1

end if

s= s & min & ";"

loop

getContinuum=left(s,len(s)-1)

end function

Re: Loop with customized decimal increment

sinanozdemir — Sat, 05 Dec 2015 00:27:13 GMT

Hi,

One approach could be using While in the load script:

And here is the data model:

I am also attaching the qvw.

Hope this helps.

Re: Loop with customized decimal increment

MarcoWedel — Sat, 05 Dec 2015 00:58:34 GMT

Hi,

a simpler solution might be:

LOAD *,
    min+If(Frac(min),0.01,1)*(IterNo()-1) as continuum
FROM [https://community.qlik.com/thread/194232] (html, codepage is 1252, embedded labels, table is @1)
While min+If(Frac(min),0.01,1)*(IterNo()-1)<=max;

hope this helps

regards

Marco

Re: Loop with customized decimal increment

Tue, 08 Dec 2015 14:21:01 GMT

Thank you everyone for your helpful responses. Using while solved the issue perfectly.

Regards,

Saad

Re: Loop with customized decimal increment

Fri, 18 Dec 2015 15:36:41 GMT

Hi Marco,

Thank you again for your suggestion on the while loop. As I mentioned earlier it did work. But upon further validation, I found that for some stores, the continuum does not reach the max value, even using the same logic. I have attached my qvw. Max from both stores is 0.54. But for store #1, continuum does not reach the max value. It stops at 0.55. Store #2 works as it should. In this case, lower is better. So I am subtracting .01 from the min value each time until it reaches the max.

It seems that the min value for store 1 (ceil(0.70395633,.01)= .71) is the problem. Because if you change the min to max and do while loop with .01 increment, for store 1, continuum goes up to only 0.7. This code is commented in the qvw.

Also, if you look at the continuum values, sometimes it is creating two sets of continuum values over the same range for each of the stores.

Any help or explanation would be greatly appreciated. I am totally stumped as to why this would not be working. Thank you in advance.

Re: Loop with customized decimal increment

Anonymous — Sat, 19 Dec 2015 02:20:54 GMT

hi Saad,

check this out

LOAD
       store,min,max,
       IterNo() as i,
       0.01*(IterNo()-1) as step,
       min + 0.01*(IterNo()-1) as currentvalue
WHILE min*100 + IterNo() - 1 <= max * 100
;
LOAD
       store,
       floor(target, .01)   as min,
       ceil(score, .01)     as max
;
LOAD *
INLINE
[
store, score, target
1, 0.70395633, 0.5479
2, 0.66028157, 0.5479
];

Re: Loop with customized decimal increment

Mon, 21 Dec 2015 14:18:17 GMT

Thanks Boris. Tried it on Friday. It seems to work. I will validate further today. Hopefully, it will work perfectly!

Re: Loop with customized decimal increment

Karim_Khan — Tue, 07 May 2019 16:08:38 GMT

Hi Marco,

Code is looks prefect to generate decimal loop but it is not working when we go to Number 0.9 i.e

if My Min=19.9 then as per code its is taking as 19.1 can it take as 19.10

Regards,

Karim Khan