how to write empty variable....
显示 更早的评论
while doing a calculation if i get a variable named "varName" with empty value i wanted to display a message "Dont not Exist"...... how to write a code for checking whether a variable contains value or it is empty... please do reply...
采纳的回答
ChristianW
2013-3-4
A = [] % A is empty
isempty(A) % Is A empty?
exist(A,'var') % Does A exist as variable?
% empty and not existing isnt the same thing
3 个评论
Elysi Cochin
2013-3-4
Abdul Rehman Akbar
2014-4-10
Thank You very much. I was searching this command. your answer is very useful for me.
Nikolay
2019-4-24
I think it should rather be:
exist('A', 'var')
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Variables 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
