Matlab的图形用户界面(GUI)允许我通过右键单击元素并选择“重命名”选项来重命名工作区中的任何元素。在命令窗口中也可以这样做吗?
以下是一些你可以轻松测试的内容,你应该这样做。这是学习和发现的最佳方式。
无论如何,答案是否定的,你不能通过命令窗口以那种方式更改变量名。命令窗口主要是用于键盘输入的。
编辑:显然,问题是关于通过命令窗口执行该更改,而不是通过鼠标执行。(为什么不事先告诉我们呢?)
没有明确的命令可以进行重命名。但是,你可以自己编写它。例如...
function renamevar(oldname,newname)
% renames a variable in the base workspace
% usage: renamevar oldname newname
% usage: renamevar('oldname','newname')
%
% renamevar is written to be used as a command, renaming a single
% variable to have a designated new name
%
% arguments: (input)
% oldname - character string - must be the name of an existing
% variable in the base matlab workspace.
%
% newname - character string - the new name of that variable
%
% Example:
% % change the name of a variable named "foo", into a new variable
% % with name "bahr". The original variable named "foo" will no
% % longer be in the matlab workspace.
%
% foo = 1:5;
% renamevar foo bahr
% test for errors
if nargin ~= 2
error('RENAMEVAR:nargin','Exactly two arguments are required')
elseif ~ischar(oldname) || ~ischar(newname)
error('RENAMEVAR:characterinput','Character input required - renamevar is a command')
end
teststr = ['exist(''',oldname,''',''var'')'];
result = evalin('base',teststr);
if result ~= 1
error('RENAMEVAR:doesnotexist', ...
['A variable named ''',oldname,''' does not exist in the base workspace'])
end
% create the new variable
str = [newname,' = ',oldname,';'];
try
evalin('base',str)
catch
error('RENAMEVAR:renamefailed','The rename failed')
end
% clear the original variable
str = ['clear ',oldname];
evalin('base',str)
您可以按以下方法在命令窗口中重命名变量:
%# create a variable
a = 3;
%# rename a to b
b = a;clear('a');
编辑
如果你想将变量重命名为存储在字符串中的另一个变量,你可以使用ASSIGNIN函数。
a = 3;
newVarName = 'b';
assignin('base',newVarName,a);
clear('a') %# in case you want to get rid of the variable a