topic Re: How to find the frequency of two variables both occurring at the same time in SAS Programming

How to find the frequency of two variables both occurring at the same time

camryndastrup — Tue, 07 Dec 2021 01:49:29 GMT

I am working on a project that involves two separate CSV files. The first data set, "Trips" has seven columns, with a trip_id, bike_id, duration, from_station_id, to_station_id, capacity and usertype. User type is the only character values, the rest are numerical. The second csv file has station_id and station_name. I am trying to identify the number of observations that have the same from_station_id and to_station_id (frequency of repeated trips).

I have tried to use proc freq, proc sort, and data DUPS, but have not been able to produce a table that shows the frequency of repeated trips. Below is the code that I have tried and I have attached the csv files with my data for reference. (DIvvyTrips is the file with from_station_id and to_station_id).

title Repeat Trips;
proc freq data = divvytrips;
	tables from_station_id to_station_id;
run;

/*proc sort data = DivvyTrips nouniquekeys out=duplicates;
	by from_station_id to_station_id;
run; 

title "Repeated Trips";
proc print data = DivvyTrips;
run;

/*data DUPS;
	set DivvyTrips;
	by from_station_id to_station_id;
	if from_station_id and to_station_id then list;
	else output;
run;



title "Repeated Trips";
proc print data=DivvyTrips;
run;*/

Re: How to find the frequency of two variables both occurring at the same time

Reeza — Tue, 07 Dec 2021 01:53:53 GMT

title Repeat Trips;
proc freq data = divvytrips;
	tables from_station_id*to_station_id / list out=want;
run;

@camryndastrup wrote:

I am working on a project that involves two separate CSV files. The first data set, "Trips" has seven columns, with a trip_id, bike_id, duration, from_station_id, to_station_id, capacity and usertype. User type is the only character values, the rest are numerical. The second csv file has station_id and station_name. I am trying to identify the number of observations that have the same from_station_id and to_station_id (frequency of repeated trips).

I have tried to use proc freq, proc sort, and data DUPS, but have not been able to produce a table that shows the frequency of repeated trips. Below is the code that I have tried and I have attached the csv files with my data for reference. (DIvvyTrips is the file with from_station_id and to_station_id).
title Repeat Trips;
proc freq data = divvytrips;
	tables from_station_id to_station_id;
run;

/*proc sort data = DivvyTrips nouniquekeys out=duplicates;
	by from_station_id to_station_id;
run; 

title "Repeated Trips";
proc print data = DivvyTrips;
run;

/*data DUPS;
	set DivvyTrips;
	by from_station_id to_station_id;
	if from_station_id and to_station_id then list;
	else output;
run;



title "Repeated Trips";
proc print data=DivvyTrips;
run;*/

Re: How to find the frequency of two variables both occurring at the same time

camryndastrup — Tue, 07 Dec 2021 02:07:59 GMT

Thank you! How can I get that table to show only the recurring observations, and eliminate the observations that only occur once?

Re: How to find the frequency of two variables both occurring at the same time

Reeza — Tue, 07 Dec 2021 02:58:01 GMT

Add a filter to the output data set?

title Repeat Trips;
proc freq data = divvytrips noprint;
	tables from_station_id*to_station_id / list out=want (where=(count>1));
run;

proc print data=want;
run;

@camryndastrup wrote:

Thank you! How can I get that table to show only the recurring observations, and eliminate the observations that only occur once?