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From: Walter Roberson on 8 Jun 2010 15:08
alfann wrote:
> Please help me for it.

What is a "chain" for your purposes? For example,

X_X_X_X_
_X_X_X_X

Do the X's form a "chain"? Or is chain restricted (as in your example) to
cases where there is a horizontal or vertical connection of components,

XX_XXX
_XXX__

Or is a chain restricted and not allow to go "backwards"?

If the code were to detect a "branch", then would that be a signal that the
line being followed is not suitable?

_XX?
XX_?
__X?

could the code stop looking to the right as soon as it saw the fork on the
grounds that your valid chains never fork? Or would the code have to consider
all forks in case one of them eventually leads to the other side?

To confirm, this next should _not_ be a chain of X's because it does not span
horizontally or vertically?

_X___
_XXXX
_____

but if the rightmost X were to be down one then it would be?


> waiting for you.

That's not a good idea: I have my own work to do, and I don't always have
feasible access to Matlab.
From: dpb on 8 Jun 2010 15:08
dpb wrote:
....

> There are some shortcuts that can negate a solution ...

Oh, just another observation fwiw...locations at which diff() returns -1
are breakpoints...

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