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create a new variable whos name is conditional

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Milad
Milad 2014-2-9
编辑： Milad 2014-2-9
Hi. How can I creat a new variable whose name I dont know yet. A simple example is below. Thanks
>> [a,b,c]=xlsread('myfile.xlsx')
a =
[]
b =
'new_var'
c =
'new_var'
.... now I want to create a variable whose name is the same as the string taken from b . i.e I want to creat a variable with name new_var . and then give it a value ( new_var=10). How?

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采纳的回答

Mischa Kim
Mischa Kim 2014-2-9
编辑：Mischa Kim 2014-2-9
Use the genvarname command.
mv = genvarname('my_varname');
eval([mv '= 123;']);
my_varname
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Mischa Kim
Mischa Kim 2014-2-9
编辑：Mischa Kim 2014-2-9
Milad, it is pretty much the same. From your code, b is a string, just like
b = 'new_var'
mv = genvarname(b);
eval([mv '= 10;']);
new_var
In other words, you create (generate) a variable name with the string contained in b, then evaluate the command sequence [mv '= 10;'] which puts the newly generated variable with its content in the workspace.
Milad
Milad 2014-2-9
编辑：Milad 2014-2-9
Thanks Mischa. I just understood what you was saying. you were right. The point was that when I read from excel, I should use genvarname like this :
mv=genvarname(b{1})
Thanks for introducing this command and for ur patience.

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更多回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-2-9
编辑：Azzi Abdelmalek 2014-2-9
Look at this link http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F
You can do it like:
varname='new_var'
assignin('base',varname,[1 2 3])
new_var
But this is not a good idea like you can read it in the link
  2 个评论
Milad
Milad 2014-2-9
In your code you already know the name of variable. suppose that you dont know what is written in excel file!
Azzi Abdelmalek
Azzi Abdelmalek 2014-2-9
I don't know the name of the variable
[a,b,c]=xlsread('myfile.xlsx')
assignin('base',b,[1 2 3])

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