[Octave-bug-tracker] [bug #48616] Matlab compatibility for semilogx() and xlim([0 uplim])

[Franz Wankelhuber]

Follow-up Comment #8, bug #48616 (project octave):

That's exactly the issue which seems to be handled a little bit more
"gracefully" in Matlab. Matlab seems to omit the boundary point in the plot
vector if one x-limit is set to 0 for a semilogx() plot.

Without knowing the exact call stack I'd guess that somewhere before the call
to opengl_renderer::draw_axes() a 


log10(x_min = 0) = -Inf 


for the lower bound of the semilogx() plot is calculated. 

-Inf as the value for x_min in draw_axes() then triggers the  


if (... || x_min < -floatmax || ...)


statement, the warning gets thrown and further plot outputs are cancelled.


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