清空筛选条件
清空筛选条件

How can I put variable equal to zero in loop

3 次查看（过去 30 天）
Adham Ahmed
Adham Ahmed 2023-2-8
评论： Adham Ahmed 2023-2-8
in this code
w= input('k=');
for k=1:w
m=sym('U1',[1 k])
end
I need to put U1k in every iteration =0
U11=0
U12=0
U13=0 .......
  1 个评论
Adham Ahmed
Adham Ahmed 2023-2-8
thank you
I need for k=1
U11=0
for k=2
U12=0
for k=3
U13=0
an so on.........
for k=9
U19=0
using loop

请先登录，再进行评论。

请先登录，再回答此问题。

回答（3 个）

Dinesh
Dinesh 2023-2-8
Hi Adham Ahmed,
For any input 'w', to create that many number of variables during run time, 'sprintf' function can be used.
Then the 'eval' function can be used to initialize them to zero as you wanted to do.
The following code takes an input 'w' and then creates that many number of variables namely U11, U12, ...., U1w at run time and initializes all of them to zero.
w = input('k='); % takes an input 'w'
for k = 1:w
var_name = sprintf('U%d%d', 1, k); % creates the dynamic variable name
eval([var_name '= 0;']); % initialization to zero
end
In the above code, for an example, if the input 'w' is 3, then you can print 'U13' using
disp(U13);
to confirm the variable creation and value assignment.
  2 个评论
Steven Lord
Steven Lord 2023-2-8
Can you dynamically create variables with numbered names like U11, U12, U13, etc.? Yes.
Should you do this? The general consensus is no. That Answers post explains why this is generally discouraged and offers several alternative approaches.
Adham Ahmed
Adham Ahmed 2023-2-8
thank you
I need for k=1
U11=0
for k=2
U12=0
for k=3
U13=0
an so on.........
for k=9
U19=0
using loop

请先登录，再进行评论。

VBBV
VBBV 2023-2-8
Ran in:
% using loop
w= 10; %input('k=');
for k=1:w
m=sym('U1',[1 k]) == 0;
end
m
m = 
you can also do so without using loop
% without loop
m=sym('U1',[1 w]) == 0
m = 
  2 个评论
Adham Ahmed
Adham Ahmed 2023-2-8
thank you
I need for k=1
U11=0
for k=2
U12=0
for k=3
U13=0
an so on.........
for k=9
U19=0
using loop

请先登录，再进行评论。

Shubham
Shubham 2023-2-8
Here's a code that sets the symbol 'U1k' to zero in each iteration:
w = input('k=');
for k = 1:w
eval(sprintf('U1%d=0', k))
end
  1 个评论
Adham Ahmed
Adham Ahmed 2023-2-8
thank you
I need for k=1
U11=0
for k=2
U12=0
for k=3
U13=0
an so on.........
for k=9
U19=0
using loop

请先登录，再进行评论。

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