[GLE-general] let d1 = d2 bug?

[Ralf S. <ral...@gm...>]

Hi,

I've come across something weird.
Look at the following code which I've taken from one of the examples
on the GLE website:

size 11 8

sub entropy x
    return (-x)*log(x)/log(2)-(1-x)*log(1-x)/log(2)
end sub

set texlabels 1
begin graph
    scale  auto
    title  "$E(D) = -p_\oplus \cdot \log_2 p_\oplus - (1-p_\oplus) \cdot \log_2 (1-p_\oplus)$"
    xtitle "$p_\oplus$"
    ytitle "Entropy $E(D)$"
    xaxis min -0.1 max 1.1
    let d1 = entropy(x) from 0 to 1
    d1 line color red
end graph

Now try this modified version which should give the same results, but doesn't:

size 11 8

sub entropy x
    return (-x)*log(x)/log(2)-(1-x)*log(1-x)/log(2)
end sub

set texlabels 1
begin graph
    scale  auto
    title  "$E(D) = -p_\oplus \cdot \log_2 p_\oplus - (1-p_\oplus) \cdot \log_2 (1-p_\oplus)$"
    xtitle "$p_\oplus$"
    ytitle "Entropy $E(D)$"
    xaxis min -0.1 max 1.1
    let d1 = entropy(x) from 0 to 1
    let d2 = d1		!!! new !!!
    d2 line color red	!!! changed !!!
end graph


On my system the second version seems to be missing the start of the line in the graph.
Shouldn't let d2=d1 give a 1-to-1 copy of d1 in d2?

I'm using version gle-graphics-4.2.4c-exe-win32.


Regards
Ralf