PLOTTING OF MITTAG-LEFFLER FUNCTION- AFUNCTION DEFINED IN TERMS OF AN INFINITE SERIES

Please can someone help me find out what is wrong with the code below: % plotting of the ML function k=0:100; alpha=0.5; t=0:100; ML = sum((t.^alpha*k)/(Gamma(0.5*k + 1))); plot(t, ML)

I AM GETTING AN ERROR MESSAGE:"Error using mtimes, inner matrix dimensions must agree"

[Walter Roberson]

duplicates http://www.mathworks.co.uk/matlabcentral/answers/106445-plotting-of-mittag-leffler-function-afunction-defined-in-terms-of-an-infinite-series