Re: [Gnuplot-info] v5.0 regression

[Ethan A M. <EAM...@gm...>]

On Friday, 09 January 2015 02:14:27 PM David Lang wrote:
> I ran into a case that worked with v4.x that doesn't work with v5, namely when 
> plotting points from a file where the x column is a timestamp and the file had 
> column headers, v4 seems to have ignored the header column (apparently deciding 
> that the timestamp was invalid and so throwing out the entire line), while v5 
> interprets the timestamp as 01-01-0000 and scaleing the entire plot to include 
> this date.

> I just was surprised when the plot that was working on my production
> system didn't work on my desktop (where I had installed 5.0). If this
> wasn't something that worked on the older versions, I would just shrug
> it off as "don't do that", but the fact that it broke a working config
> made me post about it.

Can you provide the first few lines from a data file that was handled
differently by version 4 than by version 5?

It is true that the interpretation of timestamps has changed
because version 5 uses a different epoch date, but a zero value should
be legal in either version.  It's not clear to me why there
would be a difference in recognizing a line as a header vs legal input.

Also I don't actually see how you could get incorrect interpretation
as 01-01-0000.  That's the epoch date for version 4 but not for version 5
(01-01-1970).  Was that a typo?

	Ethan