How to make it accumarray?
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Hi, may I ask that how to make it be accumulative array. I will be grateful that provide the idea. Thanks!
%% Initialize Input
K = 1*(10^-9); % Carrying Capacity of Brain Tumor
C0 = 40000; % Initial Brain Tumor Population Size
r = 4.31*(10^-3); % Growth Rate of Brain Tumor Cells
%% Model Data
t = 365; % Time in Days
C = zeros(t,1) ;
C(1) = C0;
% Calculating Brain Tumor Population
for i=2:1:t-1
C(i+1) = (K*(C0*exp(r*i)))/(K-C0+C0*exp(r*i));
end
hold on
nvec = 1:1:t;
%% Graph Plotting
figure(1)
title( 'Brain Tumor Population Against Time' )
xlabel('Time (Days)')
ylabel('Brain Tumor Population (cells)')
plot(nvec,C,'--bo','LineWidth',0.5,'MarkerSize',5,'MarkerEdgeColor','black')
grid
hold on
6 个评论
Walter Roberson
2022-1-5
编辑：Walter Roberson
2022-1-5
What would be accumulated, using what as the key value ?
I have to wonder if what you want is cumsum()
Deck Zhan Sim
2022-1-5
Mathieu NOE
2022-1-5
I wonder if there is a mistake in the equation
C(i+1) = (K*(C0*exp(r*i)))/(K-C0+C0*exp(r*i));
where does it come from ?
the data drops so fast it seems a bit strange (seen here in log scale )
Deck Zhan Sim
2022-1-5
编辑：Deck Zhan Sim
2022-1-5
@Mathieu NOE This is the formula that formulated
Deck Zhan Sim
2022-1-5
Walter Roberson
2022-1-5
plot(nvec, cumsum(C), '--bo', 'LineWidth', 0.5, 'MarkerSize', 5, 'MarkerEdgeColor', 'black')
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2022-1-5
2022-1-5
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