Update a variable within a function and recalculate
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I have created the following function
function y=fun(x)
y=2*x;
if y<0
x=-x
end
and I would like to update the input argument x if x is negative so then it invokes again the function. How can I do that?
采纳的回答
Iain
2013-5-22
0 个投票
once you invert x, add the line...
y = fun(x);
3 个评论
Giorgos Papakonstantinou
2013-5-22
Iain
2013-5-22
Theres a few things you can do.
I recommend, wherever possible, making sure that the input is correct before even getting to the actual business code. In this case x = abs(x);
Where that isn't possible, you can repeatedly call the function like that. And the last option is to place a while loop around your business code.
answer_invalid = true; keep_trying = true;
while keep_trying & answer_invalid
%business code here:
do some checks on the answer to see if it is valid, and update answer_invalid as needed. do some checks to make sure you haven't gotten stuck in an infinite loop and set keep_trying to false if so.
end
Giorgos Papakonstantinou
2013-5-22
编辑：Giorgos Papakonstantinou
2013-5-22
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