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Why does this not plot?

2 次查看（过去 30 天）
Jacob Savona
Jacob Savona 2015-3-11
关闭： dpb 2015-3-12
It runs through the loop and ends, but it doesn't plot.
function [t]=HW7_JAS_1(P,k,C)
t_lower=0;%lower guess
t_upper=100;%upper guess
t_error=abs(1-((t_upper)/(t_lower)));%error
it=1;%iteration
while t_error >= .0005
t_mid=(t_lower+t_upper)/2;%calculates root
t_error=abs(1-((t_upper)/(t_lower)));%calculates new error
lower_b=(C*exp(k*t_lower))-P;%f(lower bound)
upper_b=(C*exp(k*t_upper))-P;%f(upper bound)
froot=(C*exp(k*t_mid))-P;%f(root)
if lower_b * froot<0%checks if root is in the lower interval
t_upper=t_mid;%if it is switches upper guess to root
elseif upper_b * froot <0%checks if root is in the upper interval
t_lower=t_mid;%if it is switches lower guess to root
elseif lower_b * froot ==0%checks if the lower bound*root=0
t=t_mid;%if is then the that is the root
else
t_lower=t_lower-t_upper;
t_upper=t_upper*2;
end
plot(it,t_mid,'g*')
hold on%allows each point to plotted
xlabel('Iterations')
ylabel('Estimated time values')
legend('Bisection Method')
it=it+1;%new iteration count
end
Thanks for any help
  2 个评论
dpb
dpb 2015-3-12
Don't see why it shouldn't give a scatter plot if it points; unfortunately we have no data so can't run it to see what happens locally.
Jacob Savona
Jacob Savona 2015-3-12
Never mind it runs fine. But thanks anyway.

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