在SAS中,可以使用IF语句来设置等于0或1的变量。IF语句是一种条件语句,根据条件的真假来执行不同的操作。 在SAS中,IF语句的基本语法如下: 代码语言:txt 复制 IF condition THEN do; statements; /* 如果条件为真,则执行这些语句 */ END; ELSE do; statements; /* 如果条件为假,则执行这些语句 */ END; ...
如果expression 是 FALSE, 对当前observation不继续执行下面的语句,且,该observation不加入到新生成的dataset中。 SAS程序 移动到下一个observation。 可以将构造子集IF语句 看作是一个开关(ON-OFF switch)。如果condition是TRUE,开关是ON, 对当前observation继续执行后面的语句。如果condition是 OFF, 开关是OFF。跳过该o...
%macro macro_name; %if condition %then; /* code block to be executed if condition is true */ %else; /* code block to be executed if condition is false */ %end; %mend macro_name; 其中,macro_name是宏的名称,condition是一个逻辑表达式,可以使用SAS的逻辑运算符(如AND、OR、NOT)和比...
Using the following code data mydata5; input default$ numofkids$ count; datalines; good nochildren 1500 good kids1to2 2200 good kids3plus 300 bad nochildren 500 bad kids1to2 300 bad kids3plus 200 ; run; I created a dataset Obs default numofkids count 1 good nochildr 1500 2 good ...
Warning message:In if (idnat=="french") { : the condition has length > 1 and only the first element will be used 我被建议使用“嵌套”ifelse“相反,它的轻松,但得到更多的警告: idnat2 <- ifelse (idnat=="french", "mainland", ifelse (idbp=="overseas"|idbp=="colony", "overseas")...
IF R_Num GE 100=> 这将告诉 SAS 仅保留值大于或等于 100 的卷号。换句话说,您正在删除值小于或等于 100 的卷号。 也可以使用 IF-THEN DELETE 语句来完成。 如果-则删除 句法: IF (condition is true) THEN (delete the given statements);
ERROR: A character operand was found in the %EVAL function or %IF condition where a numeric operand is required. The condition was: &N_GROUP ERROR: The %TO value of the %DO I loop is invalid. ERROR: The macro ORDERFLOW will stop executing. When I tested this on l...
public IfConditionActivityTypeProperties withExpression(Expression expression) Set the expression property: An expression that would evaluate to Boolean. This is used to determine the block of activities (ifTrueActivities or ifFalseActivities) that will be executed. Parameters: expression - ...
如：whenapencilispartlyinaglassofwater,itlooksasifitwerebroken.首先，筷子在水中并没有真正断掉，所以asif从句必须使用虚拟语气；其次，把look和bebroken对比，两个动作明显是同时进行的，所以从句只需要用一般过去时（be动词在虚拟语气时，一般改写成were）.3）从句动作发生在主句动作之后，则从句使用...
models.IfConditionActivity public final class IfConditionActivity extends ControlActivity This activity evaluates a boolean expression and executes either the activities under the ifTrueActivities property or the ifFalseActivities property depending on the result of the expression. Constructor Summary Tabel...