getfield to get values from an entire struct array?

33 次查看（过去 30 天）
Ken
Ken 2024-3-29
评论： Ken 2024-3-30
I have an array of objects of type Peak. Given the name of a field (I will be using several in turn), I would like to get the value of that field for every object in the array, resulting in a vector of double. Is there any way to ask getfield to do that, without resorting to a for loop? Or is there some related function that would do the job for me?

请先登录，再回答此问题。

采纳的回答

Bruno Luong
Bruno Luong 2024-3-29
Ran in:
Create 1 x 3 struct array with field named 'afield'
s = struct('afield', {11 12 13})
s = 1x3 struct array with fields:
afield
s(1)
ans = struct with fields:
afield: 11
s(2)
ans = struct with fields:
afield: 12
s(3)
ans = struct with fields:
afield: 13
% Here is the command that might be usefule for you
A = cat(2, s.afield)
A = 1x3
11 12 13
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
  3 个评论
显示 1更早的评论
Bruno Luong
Bruno Luong 2024-3-29
编辑：Bruno Luong 2024-3-29
Ran in:
Take a look at dynamic fieldname
s = struct('afield', {11 12 13});
fieldname = "afield"
fieldname = "afield"
A = cat(2, s.(fieldname))
A = 1×3
11 12 13
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
Ken
Ken 2024-3-30
Well I'll be! That is some WEIRD syntax! But it fits my need perfectly. Thank 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 Structures 的更多信息

标签

产品


版本

R2023b

Community Treasure Hunt

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

Start Hunting!

Translated by