与Stata 类似,在 Mata 中可以使用if...else来进行条件判断;不同的是,Mata 中有特殊的三元条件运算符a ? b : c 3.5.1 if...else if...else语法结构如下: if (exp) statement //或者 if (exp) statement1 else statement2 //或者 if (exp1) { statement1 } else {
> ost 80 characters. (line 25): After declaring for loop statement or if-else statement, add indentation (4 whitespaces). (line 25): Always explicitly specify the condition in the if statement. (For example, declare "if var > == 1" instead of "if var".) ... 3.2 更正 如果要更正 ...
返回x为真值的位置下标,如which(c(T, F, T))返回值为1 3 ifelse(cond, statement1, statement2) 若cond(条件)为真,则执行第一个语句;若cond为假,则执行第二个语句 %in% 匹配函数,详见说明 match(x, table) 匹配函数,详见说明 %in%是常用的匹配函数,其结果返回一组逻辑向量,x %in% y给出向量x中每个...
If the result is true (nonzero), the commands inside the braces are executed. If the result is false (zero), those statements are ignored, and the statement (or statements if enclosed in braces) following the else is executed. *synax if exp { or if exp single_command multiple_commands ...
Anifstatement can optionally be followed by anelsestatement. (But, theifqualifier does not have a correspondingelsepart. Although for assigning values, there is something analagous in thecond()function, which will be described below.) Finally, and this is key to understanding the distinction betwe...
local one "2+2" but Stata does not mind if we omit the double quotes in the local (global) statement. local one 2+2 (with or without double quotes) copies the string 2+2 into the macro named one. local two = 2+2 evaluates the expression 2+2, producing 4, and stores 4 in the...
if [ ! "$islothere" -o ! "isrothere" ];then # Either the route or the lo:0 device # not found. echo "LVS-DR real server Stopped." else echo "LVS-DR real server Running." fi ;; *) # Invalid entry. echo "$0: Usage: $0 {start|status|stop}" ...
将Stata if else语句转换为python该代码在Stata中没有多大意义。不合理的是，最重要的命令 ...
Example of an if-then statement: if var1 = 123456 then var2 = 1; The condition follows the command: replace var2 = 1 if var1 == 123456 Notice that Stata requires two equals signs when testing equality.Example of an if-then do loop: if age <= 10 then do; child = 1; parent = ...
DATA New; MERGE A3 (IN=A) D3 (IN=B); BY var1 var2 var3; IF A and B then link_status=1; ELSE IF A and not B then link_status=2; ELSE link_status=3; RUN; His code: merge m:1 var1 using "filename" My code: data new_; merge new (in=A) externaldata (in=B); by...