sas中这段代码是什么意思?infile "d:\resdat\class.txt";do i=1 to 100;x=y+1;sumx+x;run;

sas中这段代码是什么意思?infile "d:\resdat\class.txt";do i=1 to 100;x=y+1;sumx+x;run;
sas中这段代码是什么意思?
infile "d:\resdat\class.txt";
do i=1 to 100;
x=y+1;
sumx+x;
run;

sas中这段代码是什么意思?infile "d:\resdat\class.txt";do i=1 to 100;x=y+1;sumx+x;run;
读入d盘resdat文件夹下txt文件
循环100次,
y值加1赋予x
x进行叠加,
简单说,y+1叠加100次