gnuplot-info

[Gnuplot-info] Step function not starting at absolute 0

[GOO C. <goo...@gm...>]

Hi all,

I'm trying to create a simple step function. I have this weird problem 
that the x-values of my function do not start at absolute 0, therefore 
creating a skew function. Here is my code:

    /set xzeroaxis lc "black"//
    //set yzeroaxis lc "black"//
    //set terminal pdf//
    //set output "step.pdf"//
    //f(x)= x <= 0 ? -1 : 1//
    //plot f(x) lw 2 lc "black"//
    /


I've also attached the output PDF. As you can see the middle part of the 
function is not parrallel with the y-axis. Does anyone know what I'm missing

Chris

[Gnuplot-info] Step function not starting at absolute 0

[GOO C. <goo...@gm...>]

Hi all,

I'm trying to create a simple step function. I have this weird problem 
that the x-values of my function do not start at absolute 0, therefore 
creating a skew function. Here is my code:

    /set xzeroaxis lc "black"//
    //set yzeroaxis lc "black"//
    //set terminal pdf//
    //set output "step.pdf"//
    //f(x)= x <= 0 ? -1 : 1//
    //plot f(x) lw 2 lc "black"//
    /


I've also attached the output PDF. As you can see the middle part of the 
function is not parrallel with the y-axis. Does anyone know what I'm missing

Chris

Re: [Gnuplot-info] Step function not starting at absolute 0

[Tatsuro M. <tma...@ya...>]

----- Original Message -----

> From: GOO Creations 
> To: gnu...@li...
> Cc: 
> Date: 2014/8/25, Mon 16:07
> Subject: [Gnuplot-info] Step function not starting at absolute 0
> 
> Hi all,
> 
> I'm trying to create a simple step function. I have this weird problem that 
> the x-values of my function do not start at absolute 0, therefore creating a 
> skew function. Here is my code:
> 
>    /set xzeroaxis lc "black"//
>    //set yzeroaxis lc "black"//
>    //set terminal pdf//
>    //set output "step.pdf"//
>    //f(x)= x <= 0 ? -1 : 1//
>    //plot f(x) lw 2 lc "black"//
>    /
> 
> 
> I've also attached the output PDF. As you can see the middle part of the 
> function is not parrallel with the y-axis. Does anyone know what I'm missing
> 
> Chris


This is not strange because the sampling points in x axis is a finite number.
(default 100).
Increasing sample number like "set sample 1000", the appearance will be better but 
that is the results mere approximation will be better.

Tatsuro  

Re: [Gnuplot-info] Step function not starting at absolute 0

[BBands <bb...@gm...>]

These two plots may help you see what is going on.

plot [-1:1] [-1:1] x with steps
plot [-1:1] [-1:1] x with fsteps

     John

On Mon, Aug 25, 2014 at 12:07 AM, GOO Creations <goo...@gm...> wrote:
> Hi all,
>
> I'm trying to create a simple step function. I have this weird problem that
> the x-values of my function do not start at absolute 0, therefore creating a
> skew function. Here is my code:
>
>    /set xzeroaxis lc "black"//
>    //set yzeroaxis lc "black"//
>    //set terminal pdf//
>    //set output "step.pdf"//
>    //f(x)= x <= 0 ? -1 : 1//
>    //plot f(x) lw 2 lc "black"//
>    /
>
>
> I've also attached the output PDF. As you can see the middle part of the
> function is not parrallel with the y-axis. Does anyone know what I'm missing