Re: [Gnuplot-info] Log scale not working?

[Hans-Bernhard B. <HBB...@t-...>]

zweifel wrote:

> I plotted a function with a regression and it worked fine as it could be
> seen on the figure out2.png, but when I tried to plot this same function
> with logscale, that is, I just added "set logscale xy" to my script, then
> the out.png appeared. But it did not seem right.

On what basis did you draw this conclusion?  What exactly did "not seem 
right" about it?

> fit f(x) "comparison" using 1:2 via e,a
> fit g(x) "comparison" using 1:3 via d,k2
> fit h(x) "comparison" using 1:4 via c,k3

The most likely problem to be found here is that these fit commands 
don't supply data errors for fit to work with.  Your expectation is 
probably based on assumptions about how 'fit' weights distances between 
data and model (particularly in the absence of data errors) that just 
don't hold.

Note that 'set logscale' is a plot setting.  It does not affect 'fit at all.