gnuplot-bugs

[Gnuplot-bugs] logarithimic calculation error, and linespoints clipboard copying error

[Mark P. <M.P...@ph...>]

Version 4.2 patchlevel 6 has two bugs

1) Logarithmic calculation error

p 10*log10(10**(5/10)) w l
incorrectly returns value of 0, while
p 10*log10(10**(5)) w l
correctly returns value of -50.

2) when copying a gnuplot graph to the clipboard and pasting it to MS 
Powerpoint, if the data set was drawn using linespoints style, then the 
points are distorted appear as horizontal lines spread across the entire 
graph in the exported graph.

Regards,

Mark.

Re: [Gnuplot-bugs] logarithimic calculation error, and linespoints clipboard copying error

[Thomas S. <t.s...@fz...>]

due to integer division 5/10 is zero:
10*log10(10**(5/10))=
10*log10(10**0)=
10*log10(1)=
10*0.0=
0.0

5./10 gives the right result.


Mark Pelusi wrote:
> 
> Version 4.2 patchlevel 6 has two bugs
> 
> 1) Logarithmic calculation error
> 
> p 10*log10(10**(5/10)) w l
> incorrectly returns value of 0, while
> p 10*log10(10**(5)) w l
> correctly returns value of -50.
> 
> 2) when copying a gnuplot graph to the clipboard and pasting it to MS 
> Powerpoint, if the data set was drawn using linespoints style, then the 
> points are distorted appear as horizontal lines spread across the entire 
> graph in the exported graph.
> 
> Regards,
> 
> Mark.
> 
> 
> 
> 
> 
> 
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