Subscript indices must either be real positive integers or logicals.

I am trying to write a programm that draws a quartic Bezier Curve,

so this is it:

clc
close all
clear all
n=5;
axis([0 100 0 100])
[p]=ginput(n)
c=[];
f=[];
for t=0:0.0001:1
    f(t)=p(1,:)*(1-t)^4+p(2,:)*t*(1-t)^3+p(3,:)*(t^2)*(1-t)^2+p(4,:)*(1-t)*t^3+p(5,:)*t^4;
    c=cat(1,c,f);
end
line(c(:,1),c(:,2))
line(p(:,1),p(:,2))

so when I run it I get this massage:

how can I solve the problem?

Answer 1

[KSSV]

clc
close all
clear all
n=5;
axis([0 100 0 100])
[p]=ginput(n)
c=[];
f=[];
T=0:0.0001:1 ;
for i = 1:length(T)  % changed here, your indices cannot be fractions. They should be positive integers
    t = T(i) ; 
    f(i)=p(1,:)*(1-t)^4+p(2,:)*t*(1-t)^3+p(3,:)*(t^2)*(1-t)^2+p(4,:)*(1-t)*t^3+p(5,:)*t^4;
    c=cat(1,c,f);
end
line(c(:,1),c(:,2))
line(p(:,1),p(:,2))

[Muntasir AlAtoom]

when I run it in this way I get this massage:

[KSSV]

clc
close all
clear all
n=5;
axis([0 100 0 100])
% [p]=ginput(n) 
p = rand(n,2) ; 
T=0:0.0001:1 ;

f=[length(T),2];

for i = 1:length(T)
    t = T(i) ; 
    f(i,:)=p(1,:)*(1-t)^4+p(2,:)*t*(1-t)^3+p(3,:)*(t^2)*(1-t)^2+p(4,:)*(1-t)*t^3+p(5,:)*t^4;    
end