Intermediate dot indexing produced a comma-separated list with 34 values, but it must produce a single value when followed by subsequent indexing operations

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Masha 2023-3-18

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https://ww2.mathworks.cn/matlabcentral/answers/1930970-intermediate-dot-indexing-produced-a-comma-separated-list-with-34-values-but-it-must-produce-a-sing

评论： Masha 2023-3-18

% Starting from pdb file
Proteinname='1UXD';
uxd = getpdb(Proteinname); 
No_of_residues = uxd.Sequence.NumOfResidues;
uxd.Model.Atom.resName
Intermediate dot '.' indexing produced a comma-separated list with 34 values, but it must produce a single value when followed by subsequent indexing operations.
isTYR = ({uxd.Model.Atom.resName} == "TYR")
uxdTYR = uxd.Model.Atom(isTYR)

In the above code, I am trying to extract the details of only the tyrosine residues from the protein '1UXD'. I am guessing the error is due to the presence of many models of the same protein in the pdb file which might have caused the output to be a comma separated list. I am in need of only the first model's tyrosine (TYR) details.. There is a possibility to handle this by turning the output into a cell array and extracting the first output which corresponds to the first model but I am uncertain of how to approach the code for this. Can anyone help :) Thankyou!