Increase time with for loop

Question

Cam B 2022-4-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1688719-increase-time-with-for-loop

评论： Walter Roberson 2022-4-5

I am trying to create a variable x that increases by 0.5, 16 times. Thus, at i =16, x it should be 8. I keep running into an error of 'Index exceeds the number of array elements. Index must not exceed 1.'

x=[];
x(1)=0;
for i=1:14
    x=x(i)+0.5
end 

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Answer 1

C B 2022-4-5

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1688719-increase-time-with-for-loop#answer_934794

编辑：C B 2022-4-5

在 MATLAB Online 中打开

You want like this or you want array?

x=0;
for i=1:16
    x=x+0.5
end 
x = 0.5000
x = 1
x = 1.5000
x = 2
x = 2.5000
x = 3
x = 3.5000
x = 4
x = 4.5000
x = 5
x = 5.5000
x = 6
x = 6.5000
x = 7
x = 7.5000
x = 8
y={};
x=0;
for i=1:16
    x=x+0.5;
    y = [y x];
end
y
y = 1×16 cell array
    {[0.5000]}    {[1]}    {[1.5000]}    {[2]}    {[2.5000]}    {[3]}    {[3.5000]}    {[4]}    {[4.5000]}    {[5]}    {[5.5000]}    {[6]}    {[6.5000]}    {[7]}    {[7.5000]}    {[8]}

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Cam B 2022-4-5

Can the answer also be represented as a vector? Can you show both forms please. Thank you.

Walter Roberson 2022-4-5

在 MATLAB Online 中打开

x(1)=0;
for i=1:16
    x(i+1)=x(i)+0.5
end 
x = 1×2
         0    0.5000
x = 1×3
         0    0.5000    1.0000
x = 1×4
         0    0.5000    1.0000    1.5000
x = 1×5
         0    0.5000    1.0000    1.5000    2.0000
x = 1×6
         0    0.5000    1.0000    1.5000    2.0000    2.5000
x = 1×7
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000
x = 1×8
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000
x = 1×9
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000    4.0000
x = 1×10
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000    4.0000    4.5000
x = 1×11
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000    4.0000    4.5000    5.0000
x = 1×12
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000    4.0000    4.5000    5.0000    5.5000
x = 1×13
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000    4.0000    4.5000    5.0000    5.5000    6.0000
x = 1×14
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000    4.0000    4.5000    5.0000    5.5000    6.0000    6.5000
x = 1×15
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000    4.0000    4.5000    5.0000    5.5000    6.0000    6.5000    7.0000
x = 1×16
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000    4.0000    4.5000    5.0000    5.5000    6.0000    6.5000    7.0000    7.5000
x = 1×17
         0    0.5000    1.0000    1.5000    2.0000    2.5000    3.0000    3.5000    4.0000    4.5000    5.0000    5.5000    6.0000    6.5000    7.0000    7.5000    8.0000