How i can code this equation ?

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Iasonas Vasios
Iasonas Vasios 2022-4-1
回答： Santosh Fatale 2022-4-4
I am working on my thesis in biomedical engineering and i am stuck in coding the following equation:
I know the values of Sn6 ,f and d. When i try to calcutale the above by using this code ( Sn7=symsum(Sn6*(f-(m/d)),m,lower bound ,upper bound)) i get an error. I don't know how to and the lower bound correctly.
  2 个评论
Iasonas Vasios
Iasonas Vasios 2022-4-1
The Sn6 value, is a matrix 1x43 double
Tala
Tala 2022-4-1
编辑：Tala 2022-4-1
infinity is a mathematical concept, for engineering tasks, I would say you want to look at order of magnitutes. Depending on the values of f and d, you could accept an uncertanity and truncate your sum, and say sum +/- error. In
one could choose infinity=1000 and use something like this
SN6=rand(1,43);
f=rand(1,1);
d=rand(1,1);
summ=zeros(1,43);
yourinf=1000;
for m=-yourinf:yourinf
u=SN6.*(f-(m/d));
SN7=summ+u;
end

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Santosh Fatale
Santosh Fatale 2022-4-4
Hi Iasonas,
I understand that you want to implement following equation in MATLAB using “Symbolic Math Toolbox”. I assume that variables , f, and d are known to you. The above equation can be implemented as follows:
syms m f;
SN7(f) = symsum(SN6*(f - (m/d)),m,lowerBound,upperBound)
f = rand(1,1) % replace it.
SN7(f)
As per the equation, the lowerBound and upperBound for summation are “” and “+∞”. This bounds generates “NaN” (Not a Number) result for variable for a given value of f. It is suggested that avoid using those values and use some finite large number as an upperBound and some finite small number as a lowerBound.
I expect this solution clears the issue you are facing in implementation.

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