Length/Index based if else statements

8 次查看（过去 30 天）
Fawad Farooq Ashraf
评论： Fawad Farooq Ashraf 2022-7-30
I have a vector of variable length, for example
b = [0.25;0.5;0.75;1;1.5;1.75;2.0];
and based on the length of this vector, I have some specific parameter K against each element of b, x is the input and my final output is m
if x < b(1)
m = K(1);
elseif x < b(2)
m = K(2);
elseif x < b(3)
m = K(3);
elseif x < b(4)
m = K(4);
elseif x < b(5)
m = K(5);
elseif x < b(6)
m = K(6);
else
m = K(7);
end
I want to generalize my code based on the length of b. Here, the length was 7 so I had to run it manually like this for 7 elements. How can I generalize this for any length of b?

请先登录，再回答此问题。

采纳的回答

Voss
Voss 2022-5-1
编辑：Voss 2022-5-1
idx = find(x < b,1);
if isempty(idx)
idx = numel(b);
end
m = K(idx);
The above assumes b is sorted in ascending order, as in the example. If b is not necessarily sorted, you'd have to sort it first.
  3 个评论
显示 1更早的评论
Joe Jones
Joe Jones 2022-7-27
Dear
Have you solved this problem? I met the error recently.
compilation of model failed while trying to resolve underspecified signal dimensions
@Fawad Farooq Ashraf
Fawad Farooq Ashraf
Fawad Farooq Ashraf 2022-7-30
@Joe Jones I guess you have to use the "Ports and Data Manager" for that. In the editor window for MATLAB Function, click on "Edit Data" and then try to specify the type and size. That should work for you.

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 Resizing and Reshaping Matrices 的更多信息

标签

产品


版本

R2020a

Community Treasure Hunt

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

Start Hunting!

Translated by