MorphologicalEulerNumber[image] computes the morphological Euler number of regions in a binary image.MorphologicalEulerNumber[image, t] treats values above t as foreground.

MorphologicalPerimeter[image] picks out the morphological perimeter of regions of foreground in image.MorphologicalPerimeter[image, t] treats values above t as foreground.

NotebookPrint[expr] sends a notebook containing expr to your default printer.NotebookPrint[notebook] sends the specified notebook to your default printer. ...

NotebookSave[notebook] saves the current version of the specified notebook. NotebookSave[notebook, " file"] saves the notebook in the specified file. NotebookSave[] saves the ...

Off[symbol::tag] switches off a message, so that it is no longer printed. Off["name"] switches off a named group of messages.Off[s] switches off tracing messages associated ...

OneIdentity is an attribute that can be assigned to a symbol f to indicate that f[x], f[f[x]], etc. are all equivalent to x for the purpose of pattern matching.

PhaseMargins[sys] gives the phase margins of a linear time-invariant system sys.

PlotPoints is an option for plotting functions that specifies how many initial sample points to use.

Prepend[expr, elem] gives expr with elem prepended.

expr >> filename writes expr to a file. Put[expr_1, expr_2, ..., " filename"] writes a sequence of expressions expr_i to a file. Put["filename "] creates an empty file with ...