Ask for a code

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Tran Hoa 2018-3-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/391395-ask-for-a-code

评论： Walter Roberson 2018-3-29

Please explain for me this code

function [L,I]=selectdof(DOF,seldof,varargin)
%SELECTDOF Select degrees of freedom.
% % L=selectdof(DOF,seldof)
% [L,I]=selectdof(DOF,seldof)
% L=selectdof(DOF,seldof,'Ordering',ordering)
% creates the matrix to extract degrees of freedom from the global degrees of
% freedom by matrix multiplication. %
% DOF Degrees of freedom (nDOF * 1)
% seldof Selected DOF labels (kDOF * 1)
% L Selection matrix (kDOF * nDOF)
% I Index vector (kDOF * 1)
% ordering 'seldof','DOF' or 'sorted' Default: 'seldof'
% Ordering of L and I similar as seldof, DOF or sorted

I have 5 nodes with coordinates

% Nodes=[NodID X  Y  Z]
Nodes=  [1     0  0  0;
         2     0  4  0;
         3     0  4  0;
         4     4  4  0;
         5     4  0  0;
         6     1  5  0];

why seldof at nodes 1 and 5 is

seldof=[0.03; 0.04; 0.05; 1.00; 5.01; 5.02];

What seldof mean ?

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Adam 2018-3-29

It's very difficult for someone to just explain an arbitrary function from somewhere else that doesn't include any validation of inputs or comments as to what they are supposed to be.

Your first port of call should be asking the person you got the code from. We don't know if the code even works so spending time trying to understand what it is doing is not worth it without more information.