How do I name elements in a field of a structure?

Question

Kim 2013-3-18

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I have a 1*1 structure with 4 fields. The structure was generated from anova1 so I didn't create it. One field is 33 *2 and I want to name each integer place with a string but I cannot seem to do this. Can anyone help?

Thanks! Kim

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Kim 2013-3-18

编辑：Walter Roberson 2013-3-18

在 MATLAB Online 中打开

st=
    gnames: [40x2 char]
         n: [1x40 double]
    source: 'anova1'
     means: [1x40 double]
        df: 200
         s: 1.1135
whos st
  Name      Size            Bytes  Class     Attributes
    st        1x1              1884  struct

Does this look right?

Walter Roberson 2013-3-18

Okay, now what is it you want to do with the information?

It appears to me that if you want to know the group name for the group whose mean is st.means(K) then you would find it at st.gnames(K,:)

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Answer 1

Azzi Abdelmalek 2013-3-18

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在 MATLAB Online 中打开

A=struct('a',rand(33,2),'b',1,'c',2,'d',3)  % your struct array
v=A.a
B.b=A.b
B.c=A.c
B.d=A.d
m=0
for k=1:33
  for p=1:2
      m=m+1
      B.(sprintf('a%d',m))=v(k,p)
  end
end

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Kim 2013-3-18

Azzi, Thank you I will try this Kim

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Answer 2

Walter Roberson 2013-3-18

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/67706-how-do-i-name-elements-in-a-field-of-a-structure#answer_79144

在 MATLAB Online 中打开

I'm not sure what you mean by naming each integer place with a string?

You can use

Structurename.appropriate_fieldname(I,J)

to access at matrix location (I,J) of the field. You can use

fieldnames(Structurename)

to find out what the field names are.

You cannot, however, do something like say that you want the variable "PLU" to refer to column 1 of the field -- not without extracting it from the structure.

If you need to be able to say things like "PLU(5) = 142031" and have it affect the contents of the structure field, then you need to use a "dataset", which I seem to recall is part of the Stats toolbox.