Graphing using linspace command

I am trying to graph the function y = t^2 * exp(-t/2) * sin(4*t) where t is user input. I do not need help making a graph, but I cannot get y to be a matrix. Please advise.

Answer 1

[Star Strider]

I would do something like this:

endtc = inputdlg('Maximum time for the simulation ');
endt = str2double(endtc{:});
t = linspace(0, endt, endt*10);
y = t.^2 .* exp(-t/2) .* sin(4*t);                      % Use Element-Wise Operations

Experiment to get the result you want.