I have two different answers from certification practice exams and I really don't understand. Example 2 makes sense to me...SUM ignores missing values. But then there's Example 1 that uses SUM but in that one "missing" makes the total SUM missing. Any clarification is greatly appreciated ...
SMALLEST : 第k个最小的值(kth smallest nonmissing value)。 STD : 标准偏差。(standard deviation)【度量数据分布的分散程度】 STDERR : 均值标准误差(Standard Error of Mean)【样本均数的标准差。是表示抽样误差大小的指标。】 SUM : 求和。 SUMABS : 绝对值的和(sum of the absolute values) USS : ...
values differently The SUM function ignores missing values and excludes them in the summation If al l values of the arguments are missing, it returns a missing value If there is evenone non-missing argument, however, it returns the sum The code to produce profit using the SUM function is: ...
NOTE:Missing valueswere generated as a result of performing an operation onmissing values. 5.2 使用SAS函数 SAS有400多个函数,主要涵盖如下领域: 函数基本形式:function-name(argument,argument,…),所有的函数都需要括号,即使没有参数。下面的程序计算使用MDY函数,MDY函数需要三个参数:月、日、年。 Birthday=MDY...
sql; select monotonic() as obs, ( case sum(missing(ssn1), missing(ssn2)) when 0 then 'No missing' when 1 then 'One missing value' else'Both missing values' end ) as status 'Missing status' from ssn_data; quit; 5. The SPEDIS and SOUNDEX functions The two functions can fulfill...
nonmissing values NMISS Returns the number of missing values ORDINAL Returns any specified order statistic RANGE Returns the range of values SKEWNESS Returns the skewness STD Returns the standard deviation STDERR Returns the standard error of the mean SUM Returns the sum of the nonmissing arguments ...
B. It is only valid in conjunction with a SUM function. C. It has no effect on variables read with the SET, MERGE and UPDATE statements. D. It adds the value of an expression to an accumulator variable and ignores missing values. Answer: C QUESTION 72 The following SAS program is ...
数值变量默认是analysis sum,字符变量默认是display column :()表示上下关系。 freq的显示在table/之后 nopercent nocol norow default value of the YEARCUTOFF= system option 1920; SAS date values are the number of days since January 1, 1960
SAS : SUM Function vs Plus Operator In the output, value of p is missing for 4th, 5th and 6th observations. 14. How to identify and remove unique and duplicate values? 1. Use PROC SORT with NODUPKEY and NODUP Options. 2. Use First. and Last. Variables - Detailed Explanation The det...
40 0 1 50 0 1 10 2 2 20 0 2 50 0 2 40 0 2 30 5 2 ; run; proc stdize data=test2 out=outdata2 outstat=teststat2 vardef=wgt missing=0; var x; weight w; by t; run; 这是sas9.4生成的teststat2数据集结果: 问题:为什么当t=1时SumWeightsUsed=2,而当t=2时SumweightsUsed=7?