Re: Is this a problem?

[Hans-Bernhard B. <br...@ph...>]

Daniel J Sebald wrote:

> plot 'battery.dat' using 1:log(2)
> plot 'battery.dat' using 1:sin(2)
> 
> The second plot, is that or is that not making sense?

They're both making a perverse kind of sense.  'Using' specifiers 
classify as extended or not depending on the presence of 'extra' 
enclosing parentheses, and those alone.  In this sense using 1:sin(2) is 
just an overly complicated way of writing 'using 1:0'

This can be useful in the case where you want to loop over column 
numbers, or have any other reason to calculate column numbers on the 
spot rather than hard coding them on the spot.  E.g. consider this script:

	p 'file.dat' u 1:n
	n = n + 1
	if (n<20) reread