Ignoring a set of values
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I need to ignore the second values returned for my subsequent functions. In other words, for the values of t_max, I need to keep 10.27 and ignore 129.72
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clear all
syms t b r;
%Profit equation
P = (200+b*t)*(0.65-0.01*r*t+0.00004*t^2)-0.45*t;
%Best time to sell
dPdt = simplify(vpa(diff(P, t)))
sym_t_max =simplify(vpa(solve(diff(P, t), t)))
t_max = simplify(subs(sym_t_max, {b, r}, {5,1}))
P_max = simplify(subs(P, {t,b,r}, {t_max, 5,1}))
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Accepted Answer
esat gulhan
on 26 Aug 2020
Try this
close all
clear all
syms t b r;
%Profit equation
P = (200+b*t)*(0.65-0.01*r*t+0.00004*t^2)-0.45*t;
%Best time to sell
dPdt = simplify(vpa(diff(P, t)));
sym_t_max =simplify(vpa(solve(diff(P, t), t)));
t_max = simplify(subs(sym_t_max, {b, r}, {5,1}));
P_max = simplify(subs(P, {t,b,r}, {t_max, 5,1}));
t_max(1)
P_max(1)
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