Calculating values from a sequence with a for loop

Question

Ryan Bowman 2018-12-8

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/434552-calculating-values-from-a-sequence-with-a-for-loop

评论： madhan ravi 2018-12-8

I'm trying to to calculate the first 100000 values of the sequence a_n = (2.2*n-1)^2 (with n=1,2,3,4,...etc) with a for loop. I cannot find out why I can't get the values I want into a column vector. I'm also just trying to display the first 10 values I get to the command window. Here is my code:

num = 100000;
n = 1;
AnLoop = zeros(1,100000);
for nLoop = 1:num
    AnLoop = (2.2.*n-1).^2;
    n = n+1;
end
disp('The first 10 values of this sequence is: ')
fprintf('%d\n', AnLoop)

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Answer 1

madhan ravi 2018-12-8

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/434552-calculating-values-from-a-sequence-with-a-for-loop#answer_351173

编辑：madhan ravi 2018-12-8

在 MATLAB Online 中打开

With Loop:

num = 100000;
n = 1:100000;
A = zeros(100000,1);
for nLoop = 1:num
    A(nLoop,1) = (2.2.*n(nLoop)-1).^2;
end
disp('The first 10 values of this sequence is: ')
fprintf('%d\n', A(1:10))
%or
disp(A(1:10))  % to disp values

Without Loop:

num = 100000;
n = 1:100000;
A=((2.2.*n-1).^2).';
disp('The first 10 values of this sequence is: ')
fprintf('%d\n', A(1:10))
disp(A(1:10))  % to disp values