:ַʽ滻

ʽ:
SymVectorReplace(s,reg,v)
SymVectorReplace(s,reg)

s  :ű洢ַ
reg:ַʽ
v  :ַ滻Ϊı,ĬΪ.vsΪͬȴСַʱ,ǻ滻.

:
r = SymVectorCreate("+","-");
s = "1a2a3a45,45a68a98a";
s=SymVectorSplit(s,",")//ִs
s = 
"1a2a3a45"
"45a68a98a"

z=SymVectorReplace(s,"a","+")//ֱӽsеa滻+
z = 
"1+2+3+45"
"45+68+98+"

z=SymVectorReplace(s,"a",r)//ִsеһa滻+,2a滻-,עrı
z = 
"1+2+3+45"
"45-68-98-"