Re: Feature request - assignment in expressions

[<pl...@pi...>]

On Tue, 08 May 2007 09:23:01 +0200, <pl...@pi...> wrote:

> Example:
> 	MAX =3D -999
> 	update_max(x) =3D assign("MAX",  x > MAX ? x : MAX)
> 	plot <foo> using 1:($2 + 0. * update_max($2))
> 	print "Maximum data value plotted was", MAX
> Comments:
> 	I'm not sure this will actually accomplish what you want, but
> 	please try it out and let us know.  If you use this inside a
> 	"using" clause, it will slow down data input. For large data files
> 	the slowdown is likely to be noticeable.  For the use above, it
> 	would probably be more convenient to have the update_max(x) function
> 	return the current value of x rather than the updated maximum.
> 	It's not clear to me how best to achieve that.

shift the 'times zero' trick inside the funtion?

  	catch_max(y) =3D y+ 0. * assign("MAX",  y > MAX ? y : MAX);
	plot <foo> using 1:(catch_max($2))

pretty much the same thing but like you say a bit more convenient for pl=
ot.

;)