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用“”时不能用数组连接字符串
>> s1="12",s2="34",s3="45"
s1 =
"12"
s2 =
"34"
s3 =
"45"
>> str=[s1,s2,s3]
str =
1×3 string 数组
"12" "34" "45"
>> s1='12',s2='34',s3='45'
s1 =
'12'
s2 =
'34'
s3 =
'45'
>> [s1,s2,s3]
ans =
'123445'
strcat字符串链接函数要使字符串之间有空格,要用“ ”,而不是‘’
>> strcat(s1,' ',s2,' ',s3)
ans =
"123445"
>> strcat(s1," ",s2," ",s3)
ans =
"12 34 45"