For loop with multiple variables

39 次查看（过去 30 天）
Vaishali Nagpure
Vaishali Nagpure 2018-1-13
编辑： Jan 2018-1-13
As in java we have "for (int i = 0, j = 1, k = 2; i < 5; i++)"
I would like to do as
for st = 1:numel(pointst) , ed = 1:numel(pointed)
What is the way i can do this kind of operation
  3 个评论
显示 1更早的评论
Greg
Greg 2018-1-13
How are j and k not acting as constants here?
for (int i = 0, j = 1, k = 2; i < 5; i++)
Vaishali Nagpure
Vaishali Nagpure 2018-1-13
Yes here those are constants what i am trying is for (int i = 1, j = 0; i <= limit; i++, j++)

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Jan
Jan 2018-1-13
编辑：Jan 2018-1-13
If you want this:
Java: for (int i = 1, j = 0; i <= limit; i++, j++)
in Matlab:
j = 0;
for i = 1:limit
j = j + 1;
...
end
Less nice alternatives:
index = [1:limit; ...
1:limit];
for k = 1:size(index, 2)
i = index(1, k);
j = index(2, k);
...
end
or
index = [1:limit; ...
1:limit];
for k = index
i = k(1);
j = k(2);
...
end
The last one might look strange. The FOR loop evaluates the given index vector along the 2nd dimension, such that the column vectors are assigned to k.
Maybe this is useful for you:
indexI = 1:limit;
indexJ = 1:limit; % Of course this is a test data only
for k = 1:numel(index1)
i = indexI(k);
j = indexJ(k);
...
end

更多回答（1 个）

Rik
Rik 2018-1-13
If you mean a nested loop:
for st = 1:numel(pointst)
for ed = 1:numel(pointed)
end
end
  1 个评论
Vaishali Nagpure
Vaishali Nagpure 2018-1-13
I want pointst first field and pointed first field at the same time in one iteration. Then in second iteration i want second field of pointst and pointed and so on ....

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Performance and Memory 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