No lines in my graph

Hello guys my code works fine but even though i add '--r' in my plot there is no line connecting them.

this is my code

g=9.8;
fc=0;
c=0;
m=68.1;
v=40;
t=10;
row=1;

A(1,1) = {'C'};
A(1,2) = {'f(C)'};

for c=0:2:20
    row = row+1;
    aprev=fc;
    fc = (g*m*(1-(exp((-c*t)/m)))/c)-v;
    A(row,1) = {c};
    A(row,2) = {fc};
        
     plot(c,fc,'-*b')
     grid on
     hold on           
end
disp(A);

Answer 1

[DGM]

To just address the plotting issue, bear in mind that what you're doing is plotting each point individually. It doesn't draw a line between them since as far as plot() knows, they don't belong to the same series.

g=9.8;
fc=0;
c=0;
m=68.1;
v=40;
t=10;
row=1;
A(1,1) = {'C'};
A(1,2) = {'f(C)'};
for c=0:2:20
    row = row+1;
    prev=fc;
    fc = (g*m*(1-(exp((-c*t)/m)))/c)-v;
    A(row,1) = {c};
    A(row,2) = {fc};
end

justthedata=cell2mat(A(2:end,:));
plot(justthedata(:,1),justthedata(:,2),'-*b')
grid on

disp(A);

Moving the plot() call outside the loop works.