Sample 24802: Simple random sample with replacement
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Click the Full Code tab above to see how to select a random sample where an observation can be chosen more than once.
Note: Method 1 uses PROC SURVEYSELECT which is part of the SAS/STAT®. If you do not have SAS/STAT licensed, see Method 2.
These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.
/* Create sample data of student grade point averages from East High School, */
/* Grades 9 through 12, 100 or more students per grade. */
data EastHigh;
format GPA 3.1;
do Grade=9 to 12;
do StudentID=1 to 100+int(201*ranuni(432098));
GPA=2.0 + (2.1*ranuni(34280));
output;
end;
end;
run;
/* Method 1: Using PROC SURVEYSELECT */
/* */
/* Use METHOD=URS. N= is the number of observations to select. The */
/* sample is stored in the OUT= data set, SAMPLE. */
/* */
/* The OUTHITS option includes an observation in the OUT= data set */
/* for each selected unit. By default, the OUT= will contain one */
/* observation for each unique selected unit and the NumberHits */
/* variable identifies the number of times each unit is selected. */
proc surveyselect data=EastHigh method=urs n=15 out=sample outhits;
run;
title "Method 1: PROC SURVEYSELECT ";
proc print;
run;
/* Method 2: Using SAS DATA Step */
/* */
/* When sampling with replacement, once an obs is selected it goes */
/* back into the pool of possible choices to be selected again. */
/* Instead of reading through the data set sequentially, as in the */
/* Simple random sample without replacement example, use the */
/* POINT= option on the SET statement to read obs directly. */
/* */
/* In the sample below, the variable 'n' is set at compile time. */
/* When the data set header is opened and read, the number of */
/* observations in the data set is assigned to the variable. */
data sample(drop=i);
choice=int(ranuni(36830)*n)+1;
set EastHigh point=choice nobs=n;
i+1;
/* Enter the desired sample size, 15 in this case */
if i>15 then stop;
run;
title "Method 2: DATA step ";
proc print;
run;
These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.
Method 1: PROC SURVEYSELECT 14:27 Thursday, November 4, 2004 47
Student Number
Obs GPA Grade ID Hits
1 2.8 9 1 1
2 2.4 9 85 1
3 3.9 9 107 1
4 3.8 9 174 1
5 2.1 9 176 1
6 2.1 10 41 1
7 2.8 10 88 1
8 2.3 10 100 1
9 3.2 10 114 1
10 3.0 11 54 1
11 3.3 11 81 1
12 3.4 12 72 1
13 2.7 12 89 1
14 2.3 12 138 1
15 3.2 12 186 1
Method 2: DATA step 14:27 Thursday, November 4, 2004 48
Student
Obs GPA Grade ID
1 2.8 9 138
2 3.7 10 3
3 3.1 11 12
4 3.6 11 111
5 2.2 11 87
6 4.0 10 97
7 2.3 12 162
8 2.7 9 166
9 3.8 12 155
10 2.7 11 106
11 3.0 10 111
12 2.1 9 122
13 2.8 10 119
14 4.0 10 35
15 2.2 9 152
Select a random sample where an observation can be chosen more than once.
| Type: | Sample |
| Topic: | Analytics ==> Survey Sampling and Analysis SAS Reference ==> Procedures ==> SURVEYSELECT SAS Reference ==> DATA Step |
| Date Modified: | 2016-01-11 16:01:34 |
| Date Created: | 2004-09-30 14:09:15 |
Operating System and Release Information
| Product Family | Product | Host | SAS Release | |
| Starting | Ending | |||
| SAS System | SAS/STAT | OpenVMS VAX | ||
| Microsoft® Windows® for 64-Bit Itanium-based Systems | ||||
| Microsoft Windows Server 2003 Datacenter 64-bit Edition | ||||
| z/OS 64-bit | ||||
| z/OS | ||||
| Microsoft Windows Server 2003 Enterprise 64-bit Edition | ||||
| Microsoft Windows XP 64-bit Edition | ||||
| Microsoft® Windows® for x64 | ||||
| OS/2 | ||||
| Microsoft Windows 8 Enterprise 32-bit | ||||
| Microsoft Windows 8 Enterprise x64 | ||||
| Microsoft Windows 8 Pro 32-bit | ||||
| Microsoft Windows 8 Pro x64 | ||||
| Microsoft Windows 8.1 Enterprise 32-bit | ||||
| Microsoft Windows 8.1 Enterprise x64 | ||||
| Microsoft Windows 8.1 Pro | ||||
| Microsoft Windows 8.1 Pro 32-bit | ||||
| Microsoft Windows 10 | ||||
| Microsoft Windows 95/98 | ||||
| Microsoft Windows 2000 Advanced Server | ||||
| Microsoft Windows 2000 Datacenter Server | ||||
| Microsoft Windows 2000 Server | ||||
| Microsoft Windows 2000 Professional | ||||
| Microsoft Windows NT Workstation | ||||
| Microsoft Windows Server 2003 Datacenter Edition | ||||
| Microsoft Windows Server 2003 Enterprise Edition | ||||
| Microsoft Windows Server 2003 Standard Edition | ||||
| Microsoft Windows Server 2003 for x64 | ||||
| Microsoft Windows Server 2008 | ||||
| Microsoft Windows Server 2008 R2 | ||||
| Microsoft Windows Server 2008 for x64 | ||||
| Microsoft Windows Server 2012 Datacenter | ||||
| Microsoft Windows Server 2012 R2 Datacenter | ||||
| Microsoft Windows Server 2012 R2 Std | ||||
| Microsoft Windows Server 2012 Std | ||||
| Microsoft Windows XP Professional | ||||
| Windows 7 Enterprise 32 bit | ||||
| Windows 7 Enterprise x64 | ||||
| Windows 7 Home Premium 32 bit | ||||
| Windows 7 Home Premium x64 | ||||
| Windows 7 Professional 32 bit | ||||
| Windows 7 Professional x64 | ||||
| Windows 7 Ultimate 32 bit | ||||
| Windows 7 Ultimate x64 | ||||
| Windows Millennium Edition (Me) | ||||
| Windows Vista | ||||
| Windows Vista for x64 | ||||
| 64-bit Enabled AIX | ||||
| 64-bit Enabled HP-UX | ||||
| 64-bit Enabled Solaris | ||||
| ABI+ for Intel Architecture | ||||
| AIX | ||||
| HP-UX | ||||
| HP-UX IPF | ||||
| IRIX | ||||
| Linux | ||||
| Linux for x64 | ||||
| Linux on Itanium | ||||
| OpenVMS Alpha | ||||
| OpenVMS on HP Integrity | ||||
| Solaris | ||||
| Solaris for x64 | ||||
| Tru64 UNIX | ||||
| SAS System | Base SAS | Aster Data nCluster on Linux x64 | ||
| DB2 Universal Database on AIX | ||||
| DB2 Universal Database on Linux x64 | ||||
| Greenplum on Linux x64 | ||||
| Netezza TwinFin 32bit blade | ||||
| Netezza TwinFin 32-bit SMP Hosts | ||||
| Netezza TwinFin 64-bit S-Blades | ||||
| Netezza TwinFin 64-bit SMP Hosts | ||||
| Teradata on Linux | ||||
| z/OS | ||||
| z/OS 64-bit | ||||
| OpenVMS VAX | ||||
| Microsoft® Windows® for 64-Bit Itanium-based Systems | ||||
| Microsoft Windows Server 2003 Datacenter 64-bit Edition | ||||
| Microsoft Windows Server 2003 Enterprise 64-bit Edition | ||||
| Microsoft Windows XP 64-bit Edition | ||||
| Microsoft® Windows® for x64 | ||||
| OS/2 | ||||
| Microsoft Windows 8 Enterprise 32-bit | ||||
| Microsoft Windows 8 Enterprise x64 | ||||
| Microsoft Windows 8 Pro 32-bit | ||||
| Microsoft Windows 8 Pro x64 | ||||
| Microsoft Windows 8.1 Enterprise 32-bit | ||||
| Microsoft Windows 8.1 Enterprise x64 | ||||
| Microsoft Windows 8.1 Pro | ||||
| Microsoft Windows 8.1 Pro 32-bit | ||||
| Microsoft Windows 10 | ||||
| Microsoft Windows 95/98 | ||||
| Microsoft Windows 2000 Advanced Server | ||||
| Microsoft Windows 2000 Datacenter Server | ||||
| Microsoft Windows 2000 Server | ||||
| Microsoft Windows 2000 Professional | ||||
| Microsoft Windows NT Workstation | ||||
| Microsoft Windows Server 2003 Datacenter Edition | ||||
| Microsoft Windows Server 2003 Enterprise Edition | ||||
| Microsoft Windows Server 2003 Standard Edition | ||||
| Microsoft Windows Server 2003 for x64 | ||||
| Microsoft Windows Server 2008 | ||||
| Microsoft Windows Server 2008 R2 | ||||
| Microsoft Windows Server 2008 for x64 | ||||
| Microsoft Windows Server 2012 Datacenter | ||||
| Microsoft Windows Server 2012 R2 Datacenter | ||||
| Microsoft Windows Server 2012 R2 Std | ||||
| Microsoft Windows Server 2012 Std | ||||
| Microsoft Windows XP Professional | ||||
| Windows 7 Enterprise 32 bit | ||||
| Windows 7 Enterprise x64 | ||||
| Windows 7 Home Premium 32 bit | ||||
| Windows 7 Home Premium x64 | ||||
| Windows 7 Professional 32 bit | ||||
| Windows 7 Professional x64 | ||||
| Windows 7 Ultimate 32 bit | ||||
| Windows 7 Ultimate x64 | ||||
| Windows Millennium Edition (Me) | ||||
| Windows Vista | ||||
| Windows Vista for x64 | ||||
| 64-bit Enabled AIX | ||||
| 64-bit Enabled HP-UX | ||||
| 64-bit Enabled Solaris | ||||
| ABI+ for Intel Architecture | ||||
| AIX | ||||
| HP-UX | ||||
| HP-UX IPF | ||||
| IRIX | ||||
| Linux | ||||
| Linux for x64 | ||||
| Linux on Itanium | ||||
| OpenVMS Alpha | ||||
| OpenVMS on HP Integrity | ||||
| Solaris | ||||
| Solaris for x64 | ||||
| Tru64 UNIX | ||||