Creating New field based on other field.

[rajender_qlik]

Hi Qlik Users,

I have sample data in below format.

Snapshot_id	No_of_points	test_points	number_of_periods	samples_per_period
1	4	1.1 1.22 1.3 1.4444	0
2	8	2.1 2.2 2.333 2.4 2.5 2.6 2.7 2.2	4	2
3	8	3.1 3.22 3.3 3.4 3.55555 3.6 3.77 3.888	8	1
4	4	4.1 4.22 4.22 4.33	4	1
5	4	5.1 5.2 5.333 5.4	1	4

and I need the output to be as below.

Snapshot_id	Degree	test_points	Period	No_of_points	number_of_periods	samples_per_period
1	1	1.1	Period-1	4	0
1	2	1.22	Period-1	4	0
1	3	1.3	Period-1	4	0
1	4	1.4444	Period-1	4	0
2	1	2.1	Period-1	8	4	2
2	2	2.2	Period-1	8	4	2
2	3	2.333	Period-2	8	4	2
2	4	2.4	Period-2	8	4	2
2	5	2.5	Period-3	8	4	2
2	6	2.6	Period-3	8	4	2
2	7	2.7	Period-4	8	4	2
2	8	2.2	Period-4	8	4	2
3	1	3.1	Period-1	8	8	1
3	2	3.22	Period-2	8	8	1
3	3	3.3	Period-3	8	8	1
3	4	3.4	Period-4	8	8	1
3	5	3.55555	Period-5	8	8	1
3	6	3.6	Period-6	8	8	1
3	7	3.77	Period-7	8	8	1
3	8	3.888	Period-8	8	8	1
4	1	4.1	Period-1	4	4	1
4	2	4.22	Period-2	4	4	1
4	3	4.22	Period-3	4	4	1
4	4	4.33	Period-4	4	4	1
5	1	5.1	Period-1	4	1	4
5	2	5.2	Period-1	4	1	4
5	3	5.333	Period-1	4	1	4
5	4	5.4	Period-1	4	1	4

I have created the field Degree using Autonumber(RowNo, Snapshot_id) ,but I need script to create the field Period. How can I do it ? number_of_periods defines the periods in each snapshot_id and samples_per_period defines the number of degree's per period in each snapshot_id. Can someone help with script for creating the field Period ?

Thanks,

Raj

[sunny_talwar]

Not entirely sure how you are creating the Period field... but rest can be done like this....

Table:

LOAD Snapshot_id,

No_of_points,

AutoNumber(RowNo(), Snapshot_id) as Degree,

SubField(test_points, ' ') as test_points,

number_of_periods,

samples_per_period;

LOAD * INLINE [

    Snapshot_id, No_of_points, test_points, number_of_periods, samples_per_period

    1, 4, 1.1 1.22 1.3 1.4444, 0

    2, 8, 2.1 2.2 2.333 2.4 2.5 2.6 2.7 2.2, 4, 2

    3, 8, 3.1 3.22 3.3 3.4 3.55555 3.6 3.77 3.888, 8, 1

    4, 4, 4.1 4.22 4.22 4.33, 4, 1

    5, 4, 5.1 5.2 5.333 5.4, 1, 4

];

[rajender_qlik]

I need the Period field. I have achieved rest of transform in the table.

[sunny_talwar]

Hahahaha okay... what is the logic?

[rajender_qlik]

Here you go.

number_of_periods defines the periods in each snapshot_id and samples_per_period defines the number of degree's per period in each snapshot_id.

[sunny_talwar]

Don't think I understand still... Why is everything within blue circle is all Period-1, but the other one changes?

[rajender_qlik]

When Snapshot_id = '1', No_of_points = '4' tells total degree's as 1,2,3,4.  since Number_of_periods = '0' its considered as 1 period so all blue is period-1 for snapshot_id = '1'.

When Snapshot_id = '2' , No_of_points = '8' so the degree = 1,2,3,4,5,6,7,8. other field which shows Number_of_periods = '4' in that snapshot_id = '2'.  So the other field shows samples_per_period = '2'. So When snapshot_id ='2' you have 4 periods taking every two degrees as one period.

Similarly, each snapshot_id has total number of  degrees per period and samples per period.

[rajender_qlik · Accepted solution]

A:

LOAD Distinct Snapshot_id,

     No_of_points,

     (SubField(test_points,' ' ))  as test_points,

     number_of_periods,

     samples_per_period,

     RowNo() as RowNo

FROM

(ooxml, embedded labels, table is Sheet2);

B:

Load AutoNumber(RowNo, Snapshot_id) as Degree,

Snapshot_id,

     No_of_points,

     test_points,

     RowNo,

     number_of_periods,

     if(IsNull(samples_per_period),No_of_points,samples_per_period) as samples_per_period

Resident A;

DROP Table A;

C:

LOAD *,

'Period'&'-'&Ceil(Degree/samples_per_period) as Period

Resident B;

DROP Table B;