topic Re: Multiple column sets combined into one column set in SAS Programming

Multiple column sets combined into one column set

VISHALKAPASI — Tue, 18 Aug 2015 10:47:54 GMT

Dear All,

Greetings for the Day..!!

Well I have trade level data for 50 days. For each day, there are 5 columns (namely Day, Flag, Price, Qty, Type) . Since my data is for 50 days, which means there are total 250 columns. (There are 60,000 plus rows for each day.)

Data:

8000 Call					8100 Call					8200 Call
Day	Flag	Price	Qty	Type	Day	Flag	Price	Qty	Type	Day	Flag	Price	Qty	Type
May 4, 2015	TRADE	320	4		May 5, 2015	TRADE	368.05	1		May 6, 2015	TRADE	355	5
May 4, 2015	TRADE	320.1	2		May 5, 2015	TRADE	368	3		May 6, 2015	TRADE	354.25	2
May 4, 2015	TRADE	316.85	1		May 6, 2015	TRADE	368	4		May 6, 2015	TRADE	354.3	2
May 4, 2015	TRADE	317.4	1		May 6, 2015	TRADE	368	2		May 6, 2015	TRADE	354.2	1
May 4, 2015	TRADE	311.05	1		May 7, 2015	TRADE	361.65	2		May 6, 2015	TRADE	354.4	1
May 4, 2015	TRADE	320.3	18		May 7, 2015	TRADE	362.8	7		May 6, 2015	TRADE	350.05	1
May 4, 2015	TRADE	318	18		May 8, 2015	TRADE	361.85	3		May 6, 2015	TRADE	347.05	2
May 4, 2015	TRADE	318	1		May 8, 2015	TRADE	362.8	1		May 6, 2015	TRADE	345.85	7
May 4, 2015	TRADE	318	2		May 9, 2015	TRADE	362.15	8		May 6, 2015	TRADE	342	3
May 4, 2015	TRADE	318	2		May 9, 2015	TRADE	366.05	1		May 6, 2015	TRADE	341	131
May 4, 2015	TRADE	318.05	2		May 10, 2015	TRADE	368	1		May 6, 2015	TRADE	343	12
May 4, 2015	TRADE	318	7		May 10, 2015	TRADE	368	3		May 6, 2015	TRADE	343	10
May 4, 2015	TRADE	320	40		May 11, 2015	TRADE	367	8		May 6, 2015	TRADE	345.1	1

Desired Output:

Day	Flag	Price	Qty	Type
May 4, 2015	8000	320	4	Call
May 4, 2015	8000	320.1	2	Call
May 4, 2015	8000	316.85	1	Call
May 4, 2015	8000	317.4	1	Call
May 4, 2015	8000	311.05	1	Call
May 4, 2015	8000	320.3	18	Call
May 4, 2015	8000	318	18	Call
May 4, 2015	8000	318	1	Call
May 4, 2015	8000	318	2	Call
May 4, 2015	8000	318	2	Call
May 4, 2015	8000	318.05	2	Call
May 4, 2015	8000	318	7	Call
May 4, 2015	8000	320	40	Call
May 5, 2015	8100	368.05	1	Call
May 5, 2015	8100	368	3	Call
May 5, 2015	8100	368	4	Call
May 5, 2015	8100	368	2	Call
May 5, 2015	8100	361.65	2	Call
May 5, 2015	8100	362.8	7	Call
May 5, 2015	8100	361.85	3	Call
May 5, 2015	8100	362.8	1	Call
May 5, 2015	8100	362.15	8	Call
May 5, 2015	8100	366.05	1	Call
May 5, 2015	8100	368	1	Call
May 5, 2015	8100	368	3	Call
May 5, 2015	8100	367	8	Call
May 6, 2015	8200	355	5	Call
May 6, 2015	8200	354.25	2	Call
May 6, 2015	8200	354.3	2	Call
May 6, 2015	8200	354.2	1	Call
May 6, 2015	8200	354.4	1	Call
May 6, 2015	8200	350.05	1	Call
May 6, 2015	8200	347.05	2	Call
May 6, 2015	8200	345.85	7	Call
May 6, 2015	8200	342	3	Call
May 6, 2015	8200	341	131	Call
May 6, 2015	8200	343	12	Call
May 6, 2015	8200	343	10	Call
May 6, 2015	8200	345.1	1	Call

Stpes required to get desired output:

1. Column Flag should consider first 4 letters of Header present in first row (e.g.8000 Call Header will show flag as 8000)

2. Column Type should consider 6-9 letters of Header (e.g. 8000 Call will show Type as Call)

3. Now,Append each days data one under other.

Request to kindly help me to get me desired output.

Thanks and Regards,

Vishal Kapasi

Re: Multiple column sets combined into one column set

Ksharp — Tue, 18 Aug 2015 12:07:00 GMT

What does your variable name look like ? They are not able to be the same name for each day.

Re: Multiple column sets combined into one column set

RW9 — Tue, 18 Aug 2015 12:35:12 GMT

This doesn't sound so much of a question as more of a "please write my code for me". Try posting some simple test data in the form of a datastep and required output. I would think something along the lines of (also I would question why you have that kind of data in the first place):

data want;

set have;

array items{3,5} day_8000 flag_8000 price_8000 ... /* put variable names here */;

do i=1 to 3;

flag=8000 + ((i-1)*100);

day=items{i,1};

price=items{i,2};

...

output;

end;

run;

Re: Multiple column sets combined into one column set

Reeza — Tue, 18 Aug 2015 15:11:13 GMT

Key word to search for here is TRANSPOSE.

Method 1 - run several proc transposes and merge data.

Method 2 - Use a data step with multiple arrays to flip the data.

Method 3 - Use the macro in the link below to transpose the data

Here are some resources to help you get started:

See example 3 here:

http://www.ats.ucla.edu/stat/sas/modules/widetolong_data.htm

A better way to flip data

http://www.sascommunity.org/wiki/A_Better_Way_to_Flip_(Transpose)_a_SAS_Dataset

Re: Multiple column sets combined into one column set

ballardw — Tue, 18 Aug 2015 18:02:24 GMT

I have a suspicion that the first thing is reading the data. Do you have the starting data as a SAS data set or not?

If not, is the source date file a text file? Is the data fixed column, csv, tab delimited or something else? Or is this an Excel or other spreadsheet data source?

Re: Multiple column sets combined into one column set

VISHALKAPASI — Tue, 18 Aug 2015 18:35:27 GMT

Hi,

Well my dataset is in excel. Since excel could not function properly on large data sets. So if it could work on SAS, by apply ing code, it will be great.

The first row of data let's call it Header for each day need to be divided in 2 columns. E.g. 8000 call will be split in 2 columns, where flag will consider 8000, n type will consider call.

Once these 2 columns modified, for each day., we will have 5 columns for each day.. Then need to append each days trade one under other, so that 250 columns (50 days), will convert into 5 required columns.

Thanks

Vishal Kapasi

Re: Multiple column sets combined into one column set

ballardw — Tue, 18 Aug 2015 19:43:19 GMT

I would contact whoever is providing that data. It may well be that someone in the past requested such output for a different purpose and could provide the data in the format you need without any obnoxious code needed.

One thing to consider is what happens if the number of columns or the order changes? I am not saying this can't be done but I find that the earlier in a process that things are addressed the better in the long run.

Re: Multiple column sets combined into one column set

Tom — Tue, 18 Aug 2015 20:43:44 GMT

I would just read it in and dump it back out into a text file so that I could read it in properly.

For some reason when I read the XLSX file I made from the first 4 records in your sample data the dates are coming in as the excel number of days format instead of the displayed format date format. If you get actual 'May 4, 2015' in your intermediate text file then used an INFORMAT like ANYDTDTE. to convert it to a date instead of the formal I used to convert from Excel number of days to SAS number of days.

ods rtf file='c:\downloads\manycol.rtf' style=minimal;

proc import datafile='c:\downloads\manycol.xlsx' dbms=xlsx out=wide replace ;

getnames=No ;

run;

proc print data=wide ; run;

filename tall temp ;

data _null_;

do col =1 by 5 ;

_p=1 ;

set wide nobs=nobs point=_p ;

array vars _character_ ;

coltype=vars(col);

do _p2=3 to nobs ;

set wide point=_p2 ;

file tall dsd ;

put coltype @ ;

do _j=0 to 4 ;

put vars(col+_j) @;

end;

put ;

end;

if col+5 > dim(vars) then stop;

end;

stop;

run;

data want ;

infile tall dsd truncover ;

length coltype $20 Day 8 Flag $20 Price 8 Qty 8 Type $20 ;

format day yymmdd10.;

input coltype -- type ;

day = day - ('01JAN1960'd - '01JAN1900'D + 2) ;

run;

proc print data=want ;

run;

ods rtf close;

Obs	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O
1	8000 Call					8100 Call					8200 Call
2	Day	Flag	Price	Qty	Type	Day	Flag	Price	Qty	Type	Day	Flag	Price	Qty	Type
3	42128	TRADE	320	4		42129	TRADE	368.05	1		42130	TRADE	355	5
4	42128	TRADE	320.1	2		42129	TRADE	368	3		42130	TRADE	354.25	2
5	42128	TRADE	316.85	1		42130	TRADE	368	4		42130	TRADE	354.3	2
6	42128	TRADE	317.4	1		42130	TRADE	368	2		42130	TRADE	354.2	1

Obs	coltype	Day	Flag	Price	Qty	Type
1	8000 Call	5/4/2015	TRADE	320	4
2	8000 Call	5/4/2015	TRADE	320.1	2
3	8000 Call	5/4/2015	TRADE	316.85	1
4	8000 Call	5/4/2015	TRADE	317.4	1
5	8100 Call	5/5/2015	TRADE	368.05	1
6	8100 Call	5/5/2015	TRADE	368	3
7	8100 Call	5/6/2015	TRADE	368	4
8	8100 Call	5/6/2015	TRADE	368	2
9	8200 Call	5/6/2015	TRADE	355	5
10	8200 Call	5/6/2015	TRADE	354.25	2
11	8200 Call	5/6/2015	TRADE	354.3	2
12	8200 Call	5/6/2015	TRADE	354.2	1

Re: Multiple column sets combined into one column set

VISHALKAPASI — Wed, 19 Aug 2015 07:08:06 GMT

Dear Mr. Tom,

Big Thanks as you have made me get desired output.

Brilliant Effort.!! Thanks a ton..

Thanks and Regards,

Vishal Kapasi

Re: Multiple column sets combined into one column set

RW9 — Wed, 19 Aug 2015 07:57:51 GMT

Tom has provided an excellent answer, however I would also just vote in favor of ballardw. Your problem is that you are using Excel which is not a tool to be dealing with data. Where is the documentation, the data transfer specification and agreement, if you don't have these then your throwing darts blindfold, the sheet could completely change next time, or have different cell formats or any numerous problems associated with Excel.