# MATLAB: How can I plot a summation correctly

plotplotssummation

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)endhold onplot(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!

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