Question

explain all the code and what are they do to the program

%Animation
axes(handles.axes2)

xlabel('length along the beam')
ylabel('deflection')
grid
u=deflection;
plot(ys,repmat(0,size(u)),'r');
axis([0 beam(1) min(deflection) max(deflection)])
drawnow
tt=repmat(0,size(u));
nn=u./1000;
for k = 1:1:1000
tt=tt+nn;

plot(ys,tt,'r');
axis([0 beam(1) min(deflection) max(deflection)])

grid
drawnow
end

Answer 1

Here im explaining above code using comments above each statements

%Animation
axes(handles.axes2)

% we are giving x axis label as length along the beam

xlabel('length along the beam')

% we are giving y axis label as deflection
ylabel('deflection')

% using grid in the graph
grid

% setting u equal to deflection
u=deflection;

% repmat(0,size(u)) returns an array of size u which contains all 0's and plotting using ys as x axis and returned %array as y axis and 'r' specifies to use colour red

plot(ys,repmat(0,size(u)),'r');

% giving x axis range 0 to beam(1) and y axis range min(deflection) to max(deflection)
axis([0 beam(1) min(deflection) max(deflection)])

% procedure draw now
drawnow

% initialising tt with array of 0's of size u
tt=repmat(0,size(u));
nn=u./1000;

%initialising for loop from 1 to 1000 with incrementing 1 step by step
for k = 1:1:1000

% adding nn to tt variable
tt=tt+nn;
% plotting ys as x axis and tt as y axis
plot(ys,tt,'r');

% giving x axis range 0 to beam(1) and y axis range min(deflection) to max(deflection)
axis([0 beam(1) min(deflection) max(deflection)])
%using grid in plot view
grid

% end of drawnow procedure
drawnow
end