连接两个字符串,其中第一个字符串最后有一个 space Matlab

Concatenate two strings where first string has a space in the end Matlab

我正在尝试使用以下方法连接两个字符串:

str=strcat('Hello World ',char(hi));

其中 hi 是一个 1x1 cell,它有字符串 'hi'

But str appears like this Hello Worldhi.

为什么我在 Hello World 之后缺少“”?

原因在strcat's documentation:

For character array inputs, strcat removes trailing ASCII white-space characters: space, tab, vertical tab, newline, carriage return, and form-feed. To preserve trailing spaces when concatenating character arrays, use horizontal array concatenation, [s1, s2, ..., sN].

For cell array inputs, strcat does not remove trailing white space.

因此:要么使用单元格字符串(将生成包含字符串的单元格)

hi = {'hi'};
str = strcat({'Hello World '},hi)

或普通的、基于括号的连接(将产生一个字符串):

str = ['Hello World ',char(hi)]

根据之前关于文档的回答中提到的内容,我不完全确定为什么会发生这种情况,但以下代码应该可以解决您的问题。

%create two cells with the strings you wish to concatenate 
A = cell({'Hello World '});
B = cell({'hi'});

%concatenate the strings to form a single cell with the full string you
%want. and then optionally convert it to char in order to have the string
%directly as a variable.
str = char(strcat(A,B));