how can I plot a summation correctly?

It is asked that summation k=0 to the n ,1/(k^2+1) and n is an input variable. It is also asked the S versus k graph. I wrote a code like:

n=input('enter the n value')
S=0;
for k=1:0.1:n
    S = S + 1/(k^2+1)
end
hold on
plot(S,k,'--ro')

The summation is correctly calculated by the n value given but I am not getting the plot result. It only gives the final summation value as a dot. What should I do to have a proper graph?

Thank you so much!

Answer 1

[Torsten]

n = 10;
k = 0:n;
S = cumsum(1./(k.^2+1));
plot(k,S)

[Asecern]

thanks for teaching the ''cumsum''.

[Celsa Pachlhofer]

Worked for me ploting Leibniz series, thanx!