Hello, I have been a SAS user (part-time) for many years, but now am using it more often with larger data sets and complex programming. I am using SAS 9.4 TS Level 1M5 on X64_10PRO platform on Windows. I think this is a good place to post this, but if I should contact tech support or other help, please advise.
I have previously used arrays to change my data set from long to wide by MRN, now I need to have multiple rows by MRN and Date. A colleague helped me with the previous project and I am trying to understand if arrays will work with my current data or if I need to use different programming.
The data has more than 200 patients, with multiple visit dates which can have multiple values for any variable. The sample attached has 2 patients and contains all the variables for my data.
My desired outcome is to create a data set that has fewer rows of data organized by MRN then Date and having each row contain all associated information for that date. For each date, a patient may have multiple diagnosis codes from different providers, different patient classes, etc.
When I run the code below, I received these errors (same for each variable):
ERROR: The array aEnc_Code has been defined with zero elements. ERROR: Too many array subscripts specified for array aEnc_Code.
I imported my data and then created data set Z and continued with the code below. I used the former coding which gave me a single row of data for each MRN, but now I need multiple rows per MRN. I have been using seq_id to count how many dates a patient was seen for, but I don't know if it is still needed. So my code below already has a couple issues, but I was unsure where to change things so I am posting what I currently have. Many thanks for any help that can be provided.
proc sort data= Z;
by MRN Date;
run;
data trial;
set Z;
by MRN Date;
if first.MRN then seq_id=0;
seq_id+1;
run;
data Y (drop=Enc_Complete); /* don't need this all all records are COMPLETE */
set trial;
by MRN Date seq_id; /*Not sure how to keep all variables I create since I don't know how many there will be, previously I had 1-25 after variables starting with Enc_Code */ keep MRN Enc_Code Enc_Type Enc_Complete Dx_Code Dx_Name Date Prov_Name Dept_ID Dept_Name Hosp_Adm_Code
Hosp_Adm_Name Pt_Class_Code Pt_Class_Name Surg_Loc_Name Discharge_Date;
/* Wanting to array both numeric and character variables */
array aEnc_Code(*) ;
array aEnc_Type(*) $;
array aDx_Code(*) ;
array aDx_Name(*) $;
array aDate(*) ;
array aProv_Name(*) $;
array aDept_ID(*) ;
array aDept_Name(*) $;
array aHosp_Adm_Code(*) ;
array aHosp_Adm_Name (*) $;
array aPt_Class_Code(*) ;
array aPt_Class_Name(*) $;
array aSurg_Loc_Name(*) $;
array aDischarge_Date(*) ;
if first.MRN then /*previously tried first.Date but that didn't work either */
do;
do i = 1 to dim(aEnc_Code);
aEnc_Code(i)= .; end;
do i = 1 to dim(aEnc_Type);
aEnc_Type(i) = ' '; end;
do i = 1 to dim(aDx_Code);
aDx_Code(i) = .; end;
do i = 1 to dim(aDx_Name);
aDx_Name(i) = ' '; end;
do i = 1 to dim(aDate);
aDate(i) = .; end;
do i = 1 to dim(aProv_Name);
aProv_Name(i) = ' '; end;
do i = 1 to dim(aDept_ID);
aDept_ID(i) = .; end;
do i = 1 to dim(aDept_Name);
aDept_Name(i) = ' '; end;
do i = 1 to dim(aHosp_Adm_Code);
aHosp_Adm_Code(i) = ; end;
do i = 1 to dim(Hosp_Adm_Name);
aHosp_Adm_Name(i) = ' ';end;
do i = 1 to dim(aPt_Class_Code);
aPt_Class_Code(i) = .; end;
do i = 1 to dim(aPt_Class_Name);
aPt_Class_Name(i) = ' '; end;
do i = 1 to dim(aSurg_Loc_Name);
aSurg_Loc_Name(i) = ' '; end;
do i = 1 to dim(aDischarge_Date);
aDischarge_Date(i) = .; end;
end;
end;
aEnc_Code(seq_id) = Enc_Code;
aDx_Code(seq_id) = Dx_Code;
aDate(seq_id) = Date;
aDept_ID(seq_id) = Dept_ID;
aHosp_Adm_Code(seq_id) = Hosp_Adm_Code;
aPt_Class_Code(seq_id) = Pt_Class_Code;
aDischarge_Date(seq_id) = Discharge_Date;
if last.MRN then output;
run;
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