How do I set all variables as zero or null?

Question

AbdullahMZ 2019-11-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/490177-how-do-i-set-all-variables-as-zero-or-null

回答： Walter Roberson 2019-11-9

Hi everyone,

I am trying to find a way to begin my script by setting all the variables as zero, and then the script will start changing the variables as I go along?

any way I can do that? any function like the Python function :

Fillna(0,inplace=True);

Thank you

2 个评论
显示无隐藏无

per isakson 2019-11-9

编辑：per isakson 2019-11-9

在 MATLAB Online 中打开

Yes

x = zeros( number_of_rows, number_of_columns );

or (imo better)

x = nan( number_of_rows, number_of_columns );

AbdullahMZ 2019-11-9

this function will only pre-define variable x, I want to pre-define all the variables

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2019-11-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/490177-how-do-i-set-all-variables-as-zero-or-null#answer_400657

No, there is no way to tell MATLAB that all variables it encounters should be considered to be initialized to zero.

There are ways to list off a number of variables by name and tell MATLAB to initialize them all to zero, but those ways are not recommended

http://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

In python, fillna() is a method for Pandas dataframes that changes nan values into other values. The MATLAB equivalent is fillmissing() . However, that has nothing to do with setting all variables to zero at the beginning.