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Re: Evaluate code fragment without making new cell for it?

Based on your example, what you really should have are 4 cells. You shouldn't try to load everything into a single cell. This approach, while convenient to a beginner, defeats many purposes and makes for difficult to understand Notebooks and code in the medium to long term.

Your present approach of copy-and-pasting, perhaps into a new Notebook even, is highly recommended.

On Mon, Jul 2, 2012 at 2:25 AM, Nasser M. Abbasi <nma at> wrote:
> Sometimes I wish the following feature existed in
> Mathematica notebook interface, but I can't seem to
> find a way to do it.
> Sometimes, (while trying things) I find that I want to
> evaluate small code fragment which sits in a cell that
> contains more code.
> Currently what I do is either copy that code fragment to
> a new cell and evaluate that cell, and when done, delete
> the cell, or split the original cell at places where I want
> to isolate the code fragment, then rejoin the cells when
> done.
> It will be nice, if there was a feature, where one can just
> select, using the mouse, the code fragment, and then right-click
> and say evaluate-selected.
> The output will go into a new output cell as normal.
> btw, the above is something one can do with that other
> system M____B
> For example, assume we have this toy cell
> ---CELL-----
> x = 16
> Sqrt[x]
> y = 3
> Sqrt[y*x]
> ---------
> And I just wanted to evaluate only
> x=16
> Sqrt[x]
> There is no easy way to do it without splitting the
> cell or making new cell as I mentioned above.
> This feature should not be hard to implement by
> the front end I would think.  The front end can
> make an 'internal hidden cell' in its own buffer of the
> code selected and evaluate it and send the output back.
> Do others think such a feature will be useful?
> --Nasser

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