How do i resolve the error in this code

Question

Felicity Kaseke 2017-3-22

回答： Guillaume 2017-3-22

for t=2005:2015
Cost(t+1)=(C*exp(-1*r*t));
end

I am getting an error which says In assigning A(I)=B,the number of elements in I should be equal to B

Answer 1

ES 2017-3-22

What are you trying to achieve in this code?

What your code does is to set Cost(0), Cost (1)...Cost(2005) to 0; And Cost(2006) to C*exp(-1*r*2005),

Cost(2007) to C*exp(-1*r*2007), so on till Cost(2016) to C*exp(-1*r*2015). Is this what you expect?

What are values of C and r? Are these arrays?

Felicity Kaseke 2017-3-22

I want the code to calculate the costs for each year, r=0.05 and C is an equation given by C= CR + CP(x(1) + a0*x(2)), where a0 is a constant

ES 2017-3-22

is C an array?

Answer 2

Guillaume 2017-3-22

The only way you can get this error is if one or both of C or r is not scalar. So what is

size(r)
size(C)

Your equation is basically creating a matrix or vector, which obviously can't be stored as a single element in Cost.