How do I fix a variable to a certain number??
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Hi Im trying to fix a variable to a certain number.
I have set a variable called 'cx' as randi([10,30]) in GUI, but later on somehow it doesn't recognize cx and just leaves it as undefined. So when I define it again as randi([10,30]), obviously it gives another number, different from the initial one.. how do I fix this variable as a constant throughout the whole loop??
3 个评论
Heejin Kim
2015-2-23
Rick Rosson
2015-2-23
Please post your code, or at least a sub-set that shows an example of the issue.
dpb
2015-2-23
"...it might seem like the definition of cx is the problem, but what I'm trying to do is just fix it as a constant."
Matlab does NOT have the concept of a constant variable (const in C, PARAMETER in Fortran). A variable is a variable; you can only keep it a constant once it's defined by ensuring by code logic that it is only ever defined that one time.
回答（2 个）
Greig
2015-2-24
I suspect that cx is defined in a callback function somewhere, but is not passed back to the GUI handles, so that to the other GUI function, cx is undefined. Have a look at Share Data Among Callbacks or try
doc guidata
Or post part of your code and we can be more specific about how to fix it.
mohammed alwaely
2019-11-27
0 个投票
how to fix this P/Po as one variable equal to zero???
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2015-2-23
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