EXPLANATION:
Here the concentration values(Cp) along with time interval for 0,4,8,12,16 are also displayed along with the plot of Cp vs t for 24 Hours.
continue statement is used to omit formulated(as per question) Cp values for interval (t) 20 and 24 or for the value of i 6 and 7.
here set(gca,'XTick',t); command is used to give x axis with intervals 0, 4, 8, 12, 16, 20 and 24
clc
clear all
close all
Dg=150;
Vd=50;
ke=0.4;
ka=1.6;
t=0:4:24;
i=1;
t1=0;
fprintf('Concentration of Drug in body:\n');
for i=1:length(t)
if(i>5)
% as at regular interval of 4hours, 4 more does are
administered
% after first dose given at t=0
% So, total 5 doses are given at t=0,4,8,12,16 time interval
% after that no does is given.So,concentration of drug is taken
for
%last 2 intervals of t=20 ,24 as 0.Because final plot will be
taken
%as t(0:4:24) vs cp.So for last 2 intervals plot requires value
for
%cp.
Cp(i)=0.0;
% as alrady all doses are given,so continue statement move the
flow
%control to for loop and increnent the value of i.
continue;
end
if(i<=5)
% insert dose concentration details in array for interval
% t=0,4,8,12,16
Cp(i)=(Dg/Vd)*(ka/(ka-ke))*(exp(-ke*t(i))-exp(-ka*t(i)));
% print t and Cp value
fprintf('t = %d : %f \n ',t(i),Cp(i));
end
end
% plot graph for t=24 hours and Cp with blue line plotting
t=0:4:24;
plot(t,Cp, 'blue')
%x axis labeling
xlabel('t(interval)-->')
%y axis labeling
ylabel('Cp(Concentration)-->')
% set x axis values from 0 to 24 at regular interval of 4
set(gca,'XTick',t);
%x graph title
title('Concentration(Cp) and time interval(t) plot ')
fprintf('\n');
SCREEN SHOT
OUTPUT
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