MATLAB: Unable to plot matrix multiples

matrixmultiple

So I'm trying to plot the sum of a matrix at 25 different values using the code below, but matlab gives me the error " Error using ^ One argument must be a square matrix and the other must be a scalar. Use POWER (.^) for elementwise power. ", Even though x technically is a scalar (right?). Note that i am NOT trying to simply multiply the matrix by a constant x. For x=2 I want to compute A*A (matrix multiplication).
clear all
A = [1.9 0.025;0.1 1.225];
v = [1;0];
for i = 1:25 answer = sum((A^i)*v); end
answer
x = (1:25);
y = sum((A^x)*v);
plot (x,y)
xlabel('# of growth periods')
ylabel('Total # of bacteria')

Best Answer

A = [1.9 0.025;0.1 1.225];
v = [1;0]; 
for i = 1:25 
   answer(i) = sum((A^i)*v); 
end  
x = 1:25;
plot (x,answer)  
xlabel('# of growth periods')  
ylabel('Total # of bacteria')
Related Question