You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: Plot_StiffMa_speedup.m
    path of file: ./repos/StiffMa/tests/Performance/StiffMaPerfTestRst
    
    the code of the file until where you have to start completion: % function Plot_speedup

% Load data
% Post_data_stiffma
% load('StiffMaRuntime.mat');

%% Speedu
    
function Plot_speedup

% Load data
% Post_data_stiffma
% load('StiffMaRuntime.mat');

%% Speedup
Speedup_scalar = FTab_CPU_Scalar.Mean ./ FTab_GPU_Scalar.Mean(1:5);
Speedup_vector = FTab_CPU_Vector.Mean ./ FTab_GPU_Vector.Mean(1:5);
nel = [10, 20, 40, 80, 160];


%% Graph
figure1 = figure('color',[1,1,1]);
axes1 = axes('Parent',figure1);

pt = plot(nel.^3, Speedup_scalar,'-+k',...   % CPU/GPU_Scalar
    nel.^3, Speedup_vector,'--ob');          % CPU/GPU_Vector

% LineWidth
nl = size(pt,1);
for i=1:nl
    pt(i).LineWidth = 2;
end