SAS Certification Handout #6: Ch

Transcription

1 SAS Certification Handout #6: Ch /************ Ch. 16 ******************* /* Suppose we have numeric variables ModelNumber Price Weight Change and date variable Date, plus a string variable Designer (with embedded blanks) /* Standard numeric data (+strings Date & Designer), allowing column input [only works for standard numeric values] note embedded blank in Designer: data a6 input ModelNumber Weight Price Change Date $ Designer $ /* cards May07 B Carlisle Feb E Oct14 K Smith proc print data=a6 Obs ModelNumber Weight Price Change Date Designer May07 B Carlisle Feb Oct14 K Smith /* Standard numeric data (+strings Date & Designer), requiring formatted input [pointer control]: Note need for missing value. and INFORMAT data a6 input ModelNumber Price +1 Weight Change +1 Date $ +2 Designer $11. cards May07 B Carlisle Feb E Oct14 K Smith proc print data=a May07 B Carlisle Feb Oct14 K Smith

2 /* Nonstandard numeric data (including Date), requiring INFORMAT, and also here requiring formatted input [pointer control]: data a6 +1 Date date7. +1 Designer $12. cards 5315 $25, (1.72% 30May07 B Carlisle 3214 $21, % 02Feb $1, % 19Oct14 K Smith proc print data=a B Carlisle K Smith /* PAD: dealing with missing values at end of a record here INFILE calls file exactly same as shown in CARDS above data a61 infile "C:\jrstevens\Teaching\SAS_Cert\Notes\a6.txt" +1 Date date7. +2 Designer $11. proc print data=a B Carlisle data a61 infile "C:\jrstevens\Teaching\SAS_Cert\Notes\a6.txt" pad +1 Date date7. +1 Designer $12. proc print data=a B Carlisle K Smith

3 /* PAD also is needed with INFILE when end-of-record markers (line returns) don't line up with variable-length records data a62 input X $ 1-2 Y 4-9 cards AB Obs X Y CD AB EF CD proc print data=a62 3 EF data a62b /* a62.txt has exact contents as CARDS lines above infile "C:\jrstevens\Teaching\SAS_Cert\Notes\a62.txt" input X $ 1-2 Y 4-9 proc print data=a62b Obs X Y 1 AB CD. data a62c infile "C:\jrstevens\Teaching\SAS_Cert\Notes\a62.txt" pad input X $ 1-2 Y 4-9 proc print data=a62c Obs X Y 1 AB CD EF /************ Ch. 17 ******************* /* Compare PAD to MISSOVER p. 544 says "The MISSOVER options works only for missing values that occur at the end of the record." It is needed when, using list input, it does not find values in the current line for all variables to be input. data a61 infile "C:\jrstevens\Teaching\SAS_Cert\Notes\a6.txt" missover +1 Date date7. +1 Designer $12. proc print data=a B Carlisle

4 /* PUT (p. 557) & DLM data a6 +1 Date date7. +1 Designer $12. cards 5315 $25, (1.72% 30May07 B Carlisle 3214 $21, % 02Feb $1, % 19Oct14 K Smith data _null_ set a6 file "C:\jrstevens\Teaching\SAS_Cert\Notes\a6CSV.csv" dlm=',' put ModelNumber Price : comma10.2 Weight Change : comma6.2 Date : date7. Designer : $ ,25,000.00,561,-1.72,30MAY00,B Carlisle 3214,21,000.21,623,2.10,02FEB12, 3321,1,200.00,.,2.50,09OCT14,K Smith data _null_ set a6 file "C:\jrstevens\Teaching\SAS_Cert\Notes\a6CSV.csv" dlm=',' dsd /* NOTE: can use DSD for non-comma delimiters, too (p. 546) put ModelNumber Price : comma10.2 Weight Change : comma6.2 Date : date7. Designer : $ ,"25,000.00",561,-1.72,30MAY00,B Carlisle 3214,"21,000.21",623,2.10,02FEB12, 3321,"1,200.00",,2.50,09OCT14,K Smith /* LENGTH $w. affects allowed length only, not # columns data a6 length X $14. input X $ Y $ Z $ cards Albuquerque NM R 45 Schenectady NY D 23 Obs X Y Z 1 Albuquerque NM R proc print data=a6 2 Schenectady NY D /* INFORMAT $w. affects both allowed length and # columns data a6 input X $14. Y $ Z $ cards Albuquerque NM R 45 Schenectady NY D 23 Obs X Y Z proc print data=a6 1 Albuquerque NM R 45 2 Schenectady NY D 23

5 /* Can use & with embedded blanks, too: data a6 length X $14. input X & $ Y $ Z $ cards Albuquerque NM R 45 Schenectady NY D 23 Obs X Y Z proc print data=a6 1 Albuquerque NM R 45 2 Schenectady NY D 23 /* Reading non-standard values without embedded blanks data a6 input X cards 1,233,541 Obs X 3,532,511 /* LOG: invalid value proc print data=a /* Without specifying INFORMAT columns data a6 input X comma. cards 1,233,541 Obs X 3,532, proc print data=a6 2 3 /* Using : to indicate nonstandard data value data a6 input X : comma. cards 1,233,541 3,532,511 Obs X proc print data=a /* Specifying INFORMAT columns data a6 input X comma10. cards 1,233,541 3,532,511 proc print data=a6 Obs X

6 /* Mixed input styles: x1* Column: fixed columns and standard data x2* Formatted: fixed columns and nonstandard data (so need INFORMAT) x3* List: don't begin or end in same column (free format) x4* Modified List: free format and have embedded blanks or nonstandard data data a6 length x4 $11. input x1 $ 1-4 x2 mmddyy8. temp $ +2 x x4 & $ /* cards filler 321 Los Angeles fs 512 Logan proc print data=a6 format x2 date8. Obs x4 x1 x2 temp x3 1 Los Angeles JUL12 filler Logan JAN15 fs 512 /************ Ch. 18 ******************* /* Date INFORMAT options data a6 x1 x2 x3 x4 date9. date=x1 format date date9./* cards /15/99 15Oct99 15Oct Jan60 02Jan1960 proc print data=a6 Obs x1 x2 x3 x4 date OCT JAN2060

7 /* Note value pointer control with dates data a6 input x1 mmddyy6. x2 mmddyy8. Obs x1 x2 x3 x4 date x3 date OCT1999 x4 date9. date=x1 format date date JAN2060 cards /15/99 15Oct99 15Oct Jan60 02Jan1960 proc print data=a6 /* Time INFORMAT options note that w in TIMEw. refers to number of characters to use, including : (Similar as in DATETIMEw.) data a6 x1 x2 time5. time=x1 format time time7./* cards Obs x1 x2 time 12:00: : :00 05:23: :23 22:15:56 22: :23:34 00:01:01 00: :15 proc print data=a :01:01 /* Again: be careful with list input data a6 input x1 time11. x2 time5. time=x1 format time time7. cards Obs x1 x2 time 12:00: :00 05:23: : :00 22:15:56 22: :23:34 00:01:01 00: :15 proc print data=a :01:01

8 /* YEARCUTOFF options yearcutoff=1970 /* compare to previous where default is 1920 data a6 x1 x2 x3 x4 date9. date=x1 format date date9./* cards /15/99 15Oct99 15Oct Jan60 02Jan1960 proc print data=a6 options yearcutoff=1920 /* reset to default Obs x1 x2 x3 x4 date OCT JAN2060 /* T2-T1 (Ch. 18) vs. DATDIF (Ch. 13) data a6 T1 T2 mmddyy6. T2_T1_direct = T2-T1 T2_T1_datdif = datdif(t1,t2,'act/act') /* NOTE: depending on context of difference taken, sometimes need to +1 at end cards proc print data=a6 format T1 weekdate21. T2 worddate14. Obs T1 T2 T2_T1_direct T2_T1_datdif 1 Fri, Oct 15, 1999 Oct 20, Tue, Feb 28, 2012 Mar 1, Sat, Feb 28, 2015 Mar 1,

9 /* Going back to Ch. 17, a better use for MISSOVER is when using list input, and have missing values at end of records data temp input X $ Y $ Z $ cards abc def ghi jkl mno stu vwx yz@ /* LOG: NOTE: SAS went to a new line when INPUT statement reached past the end of a line. Obs X Y Z proc print data=temp 1 abc def ghi 2 jkl mno stu /* Reading in a6temp.txt (same contents as CARDS above) data a6temp infile "C:\jrstevens\Teaching\SAS_Cert\Notes\a6temp.txt" input X $ Y $ Z $ /* LOG: NOTE: SAS went to a new line when INPUT statement reached past the end of a line. Obs X Y Z proc print data=temp 1 abc def ghi 2 jkl mno stu /* Reading in a6temp.txt (same contents as CARDS above) data a6temp infile "C:\jrstevens\Teaching\SAS_Cert\Notes\a6temp.txt" missover input X $ Y $ Z $ Obs X Y Z proc print data=a6temp 1 abc def ghi 2 jkl mno 3 stu vwx yz@