set automatic breakpoints (stop on error, NaN or Inf)
step through execution of an M-file
view the contents of the workspace
try: >> collatzplot(6)
function collatzplot(m) % Plot length of sequence for
Collatz problem % Prepare figure clf set(gcf,'DoubleBuffer','on') set(gca,'XScale','linear') % % Determine and plot sequence and
sequence length for N = 1:m plot_seq =
collatz(N); seq_length(N)
= length(plot_seq);
line(N,plot_seq,'Marker','.','MarkerSize',9,'Color','blue') drawnow end function
sequence=collatz(n) % Collatz problem. Generate a
sequence of integers resolving to 1 % For any positive integer, n: % Divide n by 2 if n
is even % Multiply n by 3 and
add 1 if n is odd % Repeat for the
result % Continue until the
result is 1%
sequence = n; next_value = n; while next_value > 1 if
rem(next_value,2)==0
next_value = next_value/2; else
next_value = 3*next_value+1; end sequence =
[sequence, next_value]; end
