explanation of this code

what the role of I in this code ?

can you explain this line in detail

fixedDof=find(xx==min(nodeCoordinates(:)) ...

| xx==max(nodeCoordinates(:)))’;

L=90;

numberElements=3;

nodeCoordinates=linspace(0,L,numberElements+1);

xx=nodeCoordinates;

% boundary conditions and solution

% prescribed dofs

fixedDof=find(xx==min(nodeCoordinates(:)) ...

| xx==max(nodeCoordinates(:)))’;

prescribedDof=[fixedDof]

% free Dof : activeDof

activeDof=setdiff([1:numberNodes]’,[prescribedDof]);

Answer 1

[Cris LaPierre]

It means "or". See here.

[Farid Freud]

thank you

i need the meaning of entire line

fixedDof=find(xx==min(nodeCoordinates(:)) ...

| xx==max(nodeCoordinates(:)))’;

[Cris LaPierre]

The function names seem to be pretty clear on what they are doing, but if you have any doubts, look up the functions in the documentation to see what they do..