How to extract a certain row from a struct based on a specific column name?

Hello!

I want to get the row with the DisplayName 'vfzg_w' based on the name, not the number of the field!

After that I want to work with the field Data of this specific row, is that possible?

Thanks for your advice!

Answer 1

[源樹 上林]

たぶんこう

data(data.DisplayName == 'vfzg_w', :)

[Maytheewat]

This gives the following error

Error using ==

Too many input arguments.

Do you have any tips?

[DGM]

You don't have a scalar struct, so the LHS of the test is a CSL. You shouldn't be testing chars using == anyway. Use strcmp() or something.

% say i have a nonscalar struct
inpict = imread('cameraman.tif');
mask = inpict == 220;
S = regionprops(mask,'area')

S = 12x1 struct array with fields:
    Area

% the only field is _numeric_ and _integer-valued_, 
% so == makes sense here.  it doesn't for char, or float.
% without the concatenation [], the LHS of this comparison 
% is a comma-separated list -- i.e. multiple arguments
S2 = S([S.Area] == 2)

S2 = 2x1 struct array with fields:
    Area