plot issues

[Petr Mikulik]

I went through my list of plot discrepancies of current Octave 3.1.55, and 
found the issues below. Ben, can you please fix them?

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x=-5:5;
plot(x,x, x,1-x, x,1+x)
print -dps mono.ps
print -dpsc color.ps
print -deps mono.eps
print -depsc color.eps

Bug: mono.(e)ps should be monochromatic and solid, but they are color and 
dashed; it should use:
	set term postscript {eps} monochrome solid

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There is a bug in printing plot with colorbar:

imagesc(1./hilb(33)); colorbar
print a.ps -dps

=> 1. the colorbar gets hidden under the plot
   2. width of the colorbar (compared to tics distance) is different
      on screen and in the postscript file

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printing to pdfcairo

plot(1:100)
print -dpdf z.pdf
print -dpdfcairo zz.pdf

... the output file is called pdfcairo:zz.pdf

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set(h,'yscale','lin');
Octave supports 'log', but not 'lin'.

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Bug: 'Colorbar' tag is hidden in Octave, while it should be exposed
according to Matlab:

imagesc(10./hilb(99)); colorbar
h=findobj(gcf, 'tag', 'Colorbar')
... this fails in Octave (note: findall works OK)

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b=logspace(1,10,24); a=repmat(b,10,1);
imagesc(a); h=colorbar;
set(h, 'YScale', 'log');
There is just a visual difference: Matlab puts tic labels 10^0, 10^1,
10^2, ... while gnuplot puts 1, 10, 100, ..., 100000, 1e+6, 1e+7, ...

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Petr Mikulik