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How can I creat a empty string?

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Yang
Yang 2019-5-14
评论： Walter Roberson 2019-6-1
Hi,
I need to add string to a string array, but I cannot get the results with length of 3 (like the matrix in the following code), but 4 with a empty string("") for first element. How can I create a empty string? or any alternertive approach for this purpose? Thank you very much
Example:
% for matrix
a = [];
for i = 1:3
a(end+1) = 1;
end
results: a = 1 1 1
% for string
a = string(); % a = strings; a = ""; works same
for i = 1:3
a(end+1) = "1";
end
results: a =
1×4 string array
"" "1" "1" "1"

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采纳的回答

Alex Mcaulley
Alex Mcaulley 2019-5-14
% for string
a = string([]);
for i = 1:3
a(end+1) = "1";
end

更多回答（1 个）

Shiv Kumar
Shiv Kumar 2019-5-14
std::string a;
if(a.empty())
{
}
or
std::string a;
if(!a.empty())
{
}
a = "42";
if(!a.empty())
{
}
  1 个评论
Walter Roberson
Walter Roberson 2019-6-1
This is not MATLAB code, it is C++ code. It is not clear what the relevance of it is?

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