Extracting value from Name-Value pairs using the Name string

Question

Anirudha Vijay Mahagaonkar 2021-9-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1453074-extracting-value-from-name-value-pairs-using-the-name-string

评论： Anirudha Vijay Mahagaonkar 2021-9-14

采纳的回答： Cris LaPierre

test.mat

在 MATLAB Online 中打开

Let's say I have a variable called 'test'. test is a 1x2 struct array with 2 fields - Name and Value.

test = 
  1×2 struct array with fields:
    Name
    Value 

When I open the variable 'test', this is how it looks. Each of the fields have 2 values (2 pairs of name-value pair)

How can I extract just the value of the name 'long_name' without using positional index?

Using positional index, I can do it using the following code

test(2).Value

But I want to use the name string 'long_name' to find the corresponding value, as the 'long_name' may not always be at the 2nd position in other variables like test.

Any leads on how I could do that?

Thanks!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Cris LaPierre 2021-9-14

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1453074-extracting-value-from-name-value-pairs-using-the-name-string#answer_787224

在 MATLAB Online 中打开

ind = strcmp({test.Name},'long_name');
test(ind).Value

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Anirudha Vijay Mahagaonkar 2021-9-14

Perfect! Just what I was looking for. Thanks, Cris.

请先登录，再进行评论。

Answer 2

Steven Lord 2021-9-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1453074-extracting-value-from-name-value-pairs-using-the-name-string#answer_787229

在 MATLAB Online 中打开

test = struct('units', {'degrees_east', 'degrees_north'}, ...
    'long_name', {'longitude', 'latitude'})
test = 1×2 struct array with fields:
    units
    long_name
theNames = {test.long_name};
findSpecificName = ismember(theNames, 'longitude');
T = test(findSpecificName)
T = struct with fields:
        units: 'degrees_east'
    long_name: 'longitude'
q = test(ismember(theNames, 'latitude')).units
q = 'degrees_north'