MATLAB: In this program i want to assign C(0)=c0 and i need to plot values of C(t) from t=0 to 6. Also i need to plot the values of C(t) for v=1,5,-1,-5. I got an error as Attempted to access c(0)index must be a positive integer or logical. anyone help me

attempted to access c(0); index must be a positive integer or logical.

clear all;
k=10e6;
cmin=10e-9;
cmax=10e-6;
c0=100e-9;
v=1;
for t=1:6
       C(t)=c0-sqrt(1+(2*c0^2*k*(1/cmin-1/cmax)*v*t));
end
plot(t,C,'r');

Best Answer

Your code does not generate that error message, but in general, indexes in MATLAB start at 1 not 0 like in C and some other languages.
clc;    % Clear the command window.
close all;  % Close all figures.
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
fontSize = 22;
k=10e6;
cmin=10e-9;
cmax=10e-6;
c(1)=100e-9;
v=1;
for t=1:6
       c(t+1) = c(1)-sqrt(1+(2*c(1)^2*k*(1/cmin-1/cmax)*v*t));
end
t = 0 : 6;
plot(t, c , 'rd-', 'LineWidth', 2);
grid on;
xlabel('t', 'FontSize', fontSize);
ylabel('c', 'FontSize', fontSize);
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