combine data sets fro regression

saseles — Sun, 10 Jun 2018 01:08:35 GMT

Hello Everyone,

I am new to SAS. I used to use Excel for some statistical analysis, but I am in trouble with larger size data now. I am a new SAS learner. If I cannot make the question clear, or not using right SAS terms, please be nice I tried to create a sample data, but I ran into format issues. So, i will use the following as example.

I have a data like: ( city names: a, b, c; province names: x, y, z)

individual city2010 province2010 city2011 province2011 city2012 province2012 ........

1 a x b x c y

2 a x c y d z

3 c y a x a x

4 .......................................................................(more data)

So, it reads like: individual 1 lives in city "a" which is in province "x" in 2010. Then she/he moves to city "b" (also in province "x") in 2011, etc...

I also have a yearly province-level data with information of average income for each province and each year.

e.g.

province "x" average income in 2011 is 90

province "y" average income in 2011 is 100

province "z" average income in 2011 is 80

The above numbers will be used for below example.

My study is about to see the relationship between the number of individuals move from PROVINCE to PROVINCE and income ratios, i.e. not city level. I would like to prepare a data like:

year province_from province_to count income_ratio

2011 x y 1 (province_to_income2011)/(province_from_ income2011) = 100/90

2011 x z 0 (province_to_income2011)/(province_from_ income2011) = 80/90

2011 y x 1 (province_to_income2011)/(province_from_ income2011) = 90/100

2011 y z 0 (province_to_income2011)/(province_from_ income2011) = 80/100

2012 x y 1 (province_to_income2011)/(province_from_ income2011) = 100/90

2012 x z ..............

So, this will be province-level for each year for each pair of provinces data.

I know this is a long story. I hope it is clear. Otherwise, please ask any questions. And, any help is great for me!

Thanks in advance.

Re: combine data sets fro regression

PGStats — Sun, 10 Jun 2018 21:34:42 GMT

You could make your work a lot easier by changing your data format to

Data resid:

individual year city province

with one row per individual and year.

Your other dataset would be

Data income:

province year income

Then you could get your summary statistics by combining the two datasets like this:

proc sql;
create table moves as
select 
    A.year as fromYear,
    B.year as toYear,
    A.province as fromProvince,
    B.province as toProvince,
    count(*) as n
from 
    resid as A inner join
    resid as B on A.year+1 = B.year and A.province ne B.province
group by A.year, B.year, A.province, B.province;

create table moveRatios as
select
    A.*,
    C.income / B.income as incomeRatio
from
    moves as A inner join
    income as B on A.fromProvince = B.province and A.fromYear = B.year inner join
    income as C on A.toProvince = C.province and A.toYear = C.year;
quit;

(untested)

topic combine data sets fro regression in SAS Programming

combine data sets fro regression

Re: combine data sets fro regression