From: Tait <gnuplotinfo@t4...>  20120208 02:01:14

Consider the following: reset unset key set xrange [2**4:2**8] set logscale x 2 set grid xtics mxtics ytics set ytics 1 set multiplot layout 5,2 set title 'default'; set mxtics 8; plot log(x)/log(2) set title 'xtics, 8'; set xtics 4; set mxtics 8; plot log(x)/log(2) set title 'xtics, 2'; set xtics 4; set mxtics 2; plot log(x)/log(2) set title 'xtics, 3'; set xtics 4; set mxtics 3; plot log(x)/log(2) set title 'xtics, 4'; set xtics 4; set mxtics 4; plot log(x)/log(2) set title 'xtics, 5'; set xtics 4; set mxtics 5; plot log(x)/log(2) set title 'xtics, 6'; set xtics 4; set mxtics 6; plot log(x)/log(2) set title 'xtics, 7'; set xtics 4; set mxtics 7; plot log(x)/log(2) set title 'xtics, 8'; set xtics 4; set mxtics 8; plot log(x)/log(2) set title 'xtics, 9'; set xtics 4; set mxtics 9; plot log(x)/log(2) unset multiplot It produces output like: http://i.imgur.com/AvUUZ.png In the default plot, you can see the minor tics are spaced logarithmically, as one would expect. As soon as I set the xtics spacing explicitly, the mxtics lose their spacing. But the oddity does not end there. The "xtics, 2" graph is probably expected. But then the behavior for powersoftwo mxtics is nothing like the expected logarithmic spacing (that works normally when xtics are not set explicitly). I can't explain the nonpowersoftwo mxtics at all. It appears the spacing is uniform (not logarithmic), but different after the first xtic for some reason. In any case, the help doesn't adequately explain what's happening here, and I'm sort of wondering if maybe there isn't a bug or two. Can anyone explain? 
From: walter harms <wharms@bf...>  20120208 08:09:43

Am 08.02.2012 03:01, schrieb Tait: > > Consider the following: > > reset > unset key > set xrange [2**4:2**8] > set logscale x 2 > set grid xtics mxtics ytics > set ytics 1 > set multiplot layout 5,2 > set title 'default'; set mxtics 8; plot log(x)/log(2) > set title 'xtics, 8'; set xtics 4; set mxtics 8; plot log(x)/log(2) > set title 'xtics, 2'; set xtics 4; set mxtics 2; plot log(x)/log(2) > set title 'xtics, 3'; set xtics 4; set mxtics 3; plot log(x)/log(2) > set title 'xtics, 4'; set xtics 4; set mxtics 4; plot log(x)/log(2) > set title 'xtics, 5'; set xtics 4; set mxtics 5; plot log(x)/log(2) > set title 'xtics, 6'; set xtics 4; set mxtics 6; plot log(x)/log(2) > set title 'xtics, 7'; set xtics 4; set mxtics 7; plot log(x)/log(2) > set title 'xtics, 8'; set xtics 4; set mxtics 8; plot log(x)/log(2) > set title 'xtics, 9'; set xtics 4; set mxtics 9; plot log(x)/log(2) > unset multiplot > > It produces output like: http://i.imgur.com/AvUUZ.png > > In the default plot, you can see the minor tics are spaced logarithmically, > as one would expect. As soon as I set the xtics spacing explicitly, > the mxtics lose their spacing. > > But the oddity does not end there. The "xtics, 2" graph is probably > expected. But then the behavior for powersoftwo mxtics is nothing like > the expected logarithmic spacing (that works normally when xtics are not > set explicitly). I can't explain the nonpowersoftwo mxtics at all. It > appears the spacing is uniform (not logarithmic), but different after > the first xtic for some reason. > > In any case, the help doesn't adequately explain what's happening here, > and I'm sort of wondering if maybe there isn't a bug or two. Can anyone > explain? > > hello Tait, thx for your report. It would help when you tell what version of gnuplot you are using so developers can check that. re, wh 
From: Tait <gnuplotinfo@t4...>  20120222 00:19:44

> > Consider the following: > > reset > > unset key > > set xrange [2**4:2**8] > > set logscale x 2 > > set grid xtics mxtics ytics > > set ytics 1 > > set multiplot layout 5,2 > > set title 'default'; set mxtics 8; plot log(x)/log(2) > > set title 'xtics, 8'; set xtics 4; set mxtics 8; plot log(x)/log(2) > > set title 'xtics, 2'; set xtics 4; set mxtics 2; plot log(x)/log(2) > > set title 'xtics, 3'; set xtics 4; set mxtics 3; plot log(x)/log(2) > > set title 'xtics, 4'; set xtics 4; set mxtics 4; plot log(x)/log(2) > > set title 'xtics, 5'; set xtics 4; set mxtics 5; plot log(x)/log(2) > > set title 'xtics, 6'; set xtics 4; set mxtics 6; plot log(x)/log(2) > > set title 'xtics, 7'; set xtics 4; set mxtics 7; plot log(x)/log(2) > > set title 'xtics, 8'; set xtics 4; set mxtics 8; plot log(x)/log(2) > > set title 'xtics, 9'; set xtics 4; set mxtics 9; plot log(x)/log(2) > > unset multiplot > > > > It produces output like: http://i.imgur.com/AvUUZ.png > > > > In the default plot, you can see the minor tics are spaced logarithmically, > > as one would expect. As soon as I set the xtics spacing explicitly, > > the mxtics lose their spacing. > > > > But the oddity does not end there. The "xtics, 2" graph is probably > > expected. But then the behavior for powersoftwo mxtics is nothing like > > the expected logarithmic spacing (that works normally when xtics are not > > set explicitly). I can't explain the nonpowersoftwo mxtics at all. It > > appears the spacing is uniform (not logarithmic), but different after > > the first xtic for some reason. > > > > In any case, the help doesn't adequately explain what's happening here, > > and I'm sort of wondering if maybe there isn't a bug or two. Can anyone > > explain? > > hello Tait, > thx for your report. It would help when you tell what version of gnuplot > you are using so developers can check that. > > re, > wh I was using 4.4. I just tried it out on 4.6rc1 and the behavior is the same, there. 