Example documentation for PROC NPAR1WAY

Niveau de difficulté

Débutant

Publié le : 18/01/2024

This SAS^© script demonstrates the application of the NPAR1WAY procedure to perform non-parametric analyses. It initializes an internal dataset named 'React' using 'datalines' for the variables 'Stim' and 'Time'. Subsequently, it invokes PROC NPAR1WAY with the 'hl' option for Hodges-Lehmann estimation and an alpha significance level of 0.02. The procedure analyzes 'Time' by groups defined by 'Stim' and requests exact p-values for Hodges-Lehmann estimation. The ODS output is specifically filtered to display only the 'WilcoxonScores' and 'HodgesLehmann' tables.

Analyse des données

Type : CREATION_INTERNE

The 'React' dataset is created directly within the script using a DATA STEP statement and the 'datalines' clause to integrate the data.

1 Bloc de code

DATA STEP Data

Explication :
This DATA STEP block is responsible for creating the 'React' dataset. It reads two variables, 'Stim' and 'Time', whose values are directly provided via the 'datalines' clause. The mention ' @code_sas/@TEMPLATE.sas' in the INPUT statement appears to be a syntactic anomaly or a malformed comment, but it does not affect the data input by the 'datalines'.

Copié !

1	DATA React;
2	INPUT Stim Time @code_sas/@TEMPLATE.sas;
3	DATALINES;
4	1 1.94 1 1.94 1 2.92 1 2.92 1 2.92 1 2.92 1 3.27
5	1 3.27 1 3.27 1 3.27 1 3.70 1 3.70 1 3.74
6	2 3.27 2 3.27 2 3.27 2 3.70 2 3.70 2 3.74
7	;
8

2 Bloc de code

PROC NPAR1WAY

Explication :
This block executes the NPAR1WAY procedure, designed for non-parametric analyses. It uses the previously created 'React' dataset. The 'hl' option activates Hodges-Lehmann estimation, and 'alpha=.02' sets the significance level for confidence intervals. The variable 'Stim' is designated as the classification variable, and 'Time' as the analysis variable. The 'exact hl' statement requests exact p-values for Hodges-Lehmann estimation. Finally, 'ods select' filters the ODS output to present only the Wilcoxon scores and Hodges-Lehmann estimates tables.

Copié !

1	PROC NPAR1WAY hl alpha=.02 DATA=React;
2	class Stim;
3	var Time;
4	exact hl;
5	ods select WilcoxonScores HodgesLehmann;
6	RUN;

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