Hello,
How to plot graph of y=x! in r along with all the points between x! and (x+1)!? For example If i want to know 5.2!, I should know it by seeing the graph. (5.2!=169.406099462)
Strictly speaking, x! is only defined for x a non-negative integer. To extend to non-integer values you should use the "gamma function": $\displaystyle \Gamma(x)= \int_0^\ifty z^{x- 1}e^{-z}dz$. For n a positive integer, $\displaystyle \Gamma(n)= (n- 1)!$. The gamma function is still not defined for x a negative integer but is defined for all other numbers.