For loop to add elements in a vector

Question

Huereka Aragon 2021-2-28

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/758809-for-loop-to-add-elements-in-a-vector

回答： KALYAN ACHARJYA 2021-3-1

Hello,

I wanted to come up with a for loop statement where all of my elements add up together given a formula to get each element, x(1) and length of the x vector

x=zeros(15,1);
x(1)=50;
x(2)=x(1)+(x(1)*0.005)+200;
x(3)=x(2)+(x(2)*0.005)+200;
x(4)=x(3)+(x(3)*0.005)+200; 

and etc

formula used to get each element is x(n)=(x(n)-1)+((x(n)-1)*0.005)+200 and

I mean i can do what i did up until 15 but is i know for loop is more convenient.

i tried

x=zeros(15,1);

x(1)=50;

for iv=2:length(x)

x(iv)= (x(iv-1))+((x(iv-1))*0.005)+200;

end

summ=sum(x);

disp(summ);

but doesnt seem to work

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Answer 1

KALYAN ACHARJYA 2021-3-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/758809-for-loop-to-add-elements-in-a-vector#answer_635889

在 MATLAB Online 中打开

% Set the format as per how numbers should appear in Command Window output
format shortG 

x=zeros(15,1);
x(1)=50;
for i=2:length(x)
  x(i)=x(i-1)+x(i-1)*0.005+200;
end
x

x =