Prevention of negative value in Iteration

Question

Dhananjay Singh 2021-8-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1442689-prevention-of-negative-value-in-iteration

评论： Walter Roberson 2021-8-29

What to change here such that final value never goes negative i.e (0<value<=0.00009) and x changes accordingly

x = 0.77;
maxIterations = 10000000; % Failsafe to prevent infinite loop
loopCounter = 0; % Failsafe to prevent infinite loop
value = (0.5-x);
while value >= 0.00009 && (loopCounter < maxIterations)
    x = x + 0.0001;
	value = (0.5-x);
    loopCounter = loopCounter + 1; % Failsafe to prevent infinite loop
% 	fprintf('After %d iterations, x = %f and value = %f.\n', loopCounter, x, value);
end
fprintf('After %d iterations, x = %f and value = %f.\n', loopCounter, x, value);
After 0 iterations, x = 0.770000 and value = -0.270000.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2021-8-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1442689-prevention-of-negative-value-in-iteration#answer_776359

在 MATLAB Online 中打开

while value >= 0.00009 && (loopCounter < maxIterations)
    newx = x + 0.0001;
	newvalue = (0.5-newx);
    if newvalue < 0.00009; break; end
    x = newx;
    value = newvalue;
    loopCounter = loopCounter + 1; % Failsafe to prevent infinite loop
% 	fprintf('After %d iterations, x = %f and value = %f.\n', loopCounter, x, value);
end