功能:对字符串向量取交集

格式: SymVectorIntersect(a, b)

a : 为字符串向量
b : 为字符串向量

说明: 函数执行成功, 返回a与b交集的字符串向量,即返回a和b共同的元素,返回结果中不存在重复字符串

例子:
//假如事先有如下的a,b字符串向量
a = 
"4559"
"769.5"
"3363.5"
"4892.5"
"489.5"
"2815.5"
"s"
"s"
"xz"

b = 
"4559"
"769.5"
"3363.5"
"4892.5"
"489.5"
"2815.5"
"y"
"s"
"s"
"s"
"s"
"s"

c = SymVectorIntersect(a,b)//执行后得到如下结果,注意,返回结果不存在重复字符串
c = 
"4559"
"769.5"
"3363.5"
"4892.5"
"489.5"
"2815.5"
"s"