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how to use >,< with while loop

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Navikesh Krishna
Navikesh Krishna 2019-8-20
评论： Walter Roberson 2019-8-20
if i have a list of numbers and i have to use 'while' loop to determine when the list of numbers decreased by 10000 from initial value , how should i code it ?
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Navikesh Krishna
Navikesh Krishna 2019-8-20
I tried this but this didnt work :
-while altitude < 10000
-disp(altitude(1,1))
-end
1.PNG
Walter Roberson
Walter Roberson 2019-8-20
hint:
idx = 1;
while idx.^3 + 5*idx.^2 - 19 < 10000
idx = idx + 1;
end
disp(idx)

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回答（1 个）

AlexG
AlexG 2019-8-20
编辑：AlexG 2019-8-20
Not clear what you mean by the initial value but if you mean the first value in the list that is 10000 less than its first value then you could use:
index = find(a <= a(1) - 10000, 1);
Above, a is your vector of numbers, e.g.,
a = [1:3 -10000:0];
  1 个评论
Navikesh Krishna
Navikesh Krishna 2019-8-20
this is my initial values given and i have to find when the values deceased by 10000
i tried : while altitude < 10000
disp(altitude(1,1))
end
but it didnt work out
1.PNG

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