fprintf error:function not defined for struct inputs

I have an input argument that is a 1x1 struct

this is my code

function escrevecircuitos(circuito, fid)

if fid == 1 fprintf(fid,'%8s %13s %2s %2s %9s %7s\r\n', 'circuito', 'nome_ficheiro', 'SE', 'ID', 'Perimetro', 'Recorde'); for i = 1:length(circuito) fprintf('%20s %14.1s %2.6f %1.6f %2.6f %1.6f %4d %1:2:3f\r\n',circuito(i).circuito,circuito(i).nome_ficheiro,circuito(i).SE(1),circuito(i).ID,circuito(i).Perimetro,circuito(i).Recorde); end end

How can i solve the problem,the error is

Error using fprintf Function is not defined for 'struct' inputs.

Error in escrevecircuitos (line 7) fprintf('%20s %14.1s %2.6f %1.6f %2.6f %1.6f %4d %1:2:3f\r\n',circuito(i).circuito,circuito(i).nome_ficheiro,circuito(i).SE(1),circuito(i).ID,circuito(i).Perimetro,circuito(i).Recorde)

Thank you for the help

Answer 1

[Walter Roberson]

That looks okay at the moment, unless one of the fields inside circuito is itself a structure. Perhaps circuito(i).circuito or circuito(i).Perimetro

Try this to help debug

fn = fieldnames(circuito);
for K = 1 : length(circuito)
  for f = 1 : length(fn)
    if isstruct( circuito(K).(fn{f}) )
      fprintf('Index %d field %s is structure\n', K, fn{f} );
    end
  end
end

[Tomas]

both circuito(1).SE and circuito(i).ID are 1x1 structures,

how can solve this?i need the fprintf to give me the two values inside SE and ID