decimal increment inside a for loop

2 次查看（过去 30 天）
A Basu
A Basu 2017-6-13
评论： Star Strider 2020-4-14
Hi, I am trying to run a for loop as part of my code. I am trying to have 15 j values between z2 and z1 which are decimal numbers and change with every iteration. The error I am getting is "Subscript indices must either be real positive integers or logicals."I know I am getting the increments wrong but need some suggestions to solve the error.
for i = 1:1:49
X_even = [];
C_even = [];
P_even = [];
z1 = S0 - 2 * std(S) * sqrt(T - dt);
z2 = S0 + 2 * std(S) * sqrt(T - dt);
z = (z2-z1);
for j = z1:(z2-z1)/15:z2
X_even = [X_even ; X1(j,i)];
C_even = [C_even ; C1(j,i)];
P_even = [P_even ; P1(j,i)];
end
X1_even = [X1_even X_even];
C1_even = [C1_even C_even];
P1_even = [P1_even P_even];
end

请先登录，再回答此问题。

采纳的回答

Star Strider
Star Strider 2017-6-13
You need to do something like this:
vj = z1:(z2-z1)/15:z2;
for j = 1:length(vj)
X_even = [X_even ; X1(j,i)];
C_even = [C_even ; C1(j,i)];
P_even = [P_even ; P1(j,i)];
end
If you are using ‘vj’ in calculations (although you do not seem to be in the code you posted), refer to fractional ‘j’ as ‘vj(j)’.
  5 个评论
显示 3更早的评论
Steven Lord
Steven Lord 2020-4-14
There's no such thing as element 799.9 of an array, like you're trying to assign to in this for loop.
for i=stress0.plus10;1500
strain.stressplus10(i)=(i/E1)+((i-stress0.plus10)/E2); % This is where my error begins
end
The semicolon in the line with your for loop should probably be a colon, but that won't save you because the first iteration through the loop you're trying to assign to strain.stressplus10(799.9).
Star Strider
Star Strider 2020-4-14
Als, that should be a new Question. It has nothing directly to do with the current thread.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by