SUDAAN is a software package used for analyzing complex survey data. It allows researchers to account for the complex sampling designs commonly used in surveys and provides accurate estimates of population parameters. In order to improve the efficiency and speed of data analysis, the option to limit the number of observations used by SUDAAN is available. This feature allows researchers to specify a subset of the data to be used in the analysis, reducing the computational burden and potentially improving the speed of the analysis. By limiting the number of observations, researchers can also focus on specific subgroups of the population and obtain more precise estimates for these groups. This flexibility in data selection can help researchers tailor their analysis to their specific research questions and improve the accuracy of their findings.
How can I limit the number of observations used by SUDAAN? | SUDAAN FAQ
If you are working with a very large data set and you find that running
procedures takes a while, you can use the maxobs = option on the proc
statement of all analysis procedures to limit the number of observations that
are read in. This can be very useful when you are debugging a program.
Just remember to delete that option when you have the programming working
correctly. Compare the results of the two proc reg calls below.
proc regress data=temp1 filetype=sas design = jackknife maxobs = 1000; weight rakedw0; jackwgts rakedw1--rakedw80 / adjjack=1; model ae13 = ae14; run;Number of observations read : 1000 Weighted count: 431947 Observations used in the analysis : 591 Weighted count: 242364 Denominator degrees of freedom : 80 Maximum number of estimable parameters for the model is 2 Weighted mean response is 2.262239 Multiple R-Square for the dependent variable AE13: 0.216196 Variance Estimation Method: Replicate Weight Jackknife Working Correlations: Independent Link Function: Identity Response variable AE13: AE13 ---------------------------------------------------------------------- Independent P-value Variables and Beta T-Test Effects Coeff. SE Beta T-Test B=0 B=0 ---------------------------------------------------------------------- Intercept 1.96 0.11 17.83 0.0000 AE14 0.32 0.08 3.78 0.0003 ---------------------------------------------------------------------- ------------------------------------------------------- Contrast Degrees of P-value Freedom Wald F Wald F ------------------------------------------------------- OVERALL MODEL 2 197.90 0.0000 MODEL MINUS INTERCEPT 1 14.29 0.0003 INTERCEPT 1 317.85 0.0000 AE14 1 14.29 0.0003 -------------------------------------------------------proc regress data=temp1 filetype=sas design = jackknife; weight rakedw0; jackwgts rakedw1--rakedw80 / adjjack=1; model ae13 = ae14; run;Number of observations read : 55428 Weighted count: 23847415 Observations used in the analysis : 32538 Weighted count: 13783845 Denominator degrees of freedom : 80 Maximum number of estimable parameters for the model is 2 Weighted mean response is 2.188590 Multiple R-Square for the dependent variable AE13: 0.241897 Variance Estimation Method: Replicate Weight Jackknife Working Correlations: Independent Link Function: Identity Response variable AE13: AE13 ---------------------------------------------------------------------- Independent P-value Variables and Beta T-Test Effects Coeff. SE Beta T-Test B=0 B=0 ---------------------------------------------------------------------- Intercept 1.88 0.01 152.15 0.0000 AE14 0.34 0.01 25.47 0.0000 ---------------------------------------------------------------------- ------------------------------------------------------- Contrast Degrees of P-value Freedom Wald F Wald F ------------------------------------------------------- OVERALL MODEL 2 12818.28 0.0000 MODEL MINUS INTERCEPT 1 648.71 0.0000 INTERCEPT 1 23150.59 0.0000 AE14 1 648.71 0.0000 -------------------------------------------------------
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stats writer (2024). How can I limit the number of observations used by SUDAAN?. PSYCHOLOGICAL SCALES. Retrieved from https://scales.arabpsychology.com/stats/how-can-i-limit-the-number-of-observations-used-by-sudaan/
stats writer. "How can I limit the number of observations used by SUDAAN?." PSYCHOLOGICAL SCALES, 1 Jul. 2024, https://scales.arabpsychology.com/stats/how-can-i-limit-the-number-of-observations-used-by-sudaan/.
stats writer. "How can I limit the number of observations used by SUDAAN?." PSYCHOLOGICAL SCALES, 2024. https://scales.arabpsychology.com/stats/how-can-i-limit-the-number-of-observations-used-by-sudaan/.
stats writer (2024) 'How can I limit the number of observations used by SUDAAN?', PSYCHOLOGICAL SCALES. Available at: https://scales.arabpsychology.com/stats/how-can-i-limit-the-number-of-observations-used-by-sudaan/.
[1] stats writer, "How can I limit the number of observations used by SUDAAN?," PSYCHOLOGICAL SCALES, vol. X, no. Y, ص Z-Z, July, 2024.
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