# This example shows how in gnuplot version 5 a nonlinear axis definition # can be used to set up log-scale axes. This mechanism replaces a special-case # logscale implementation provided by previous versions of gnuplot. # The pair of commands # set nonlinear x via log10(x) inverse 10**x # set xtics log # is equivalent to the pre-v5 command # set logscale x # The "set logscale" command is still accepted as a shortcut. # # This plot is the same as plot #2 in electrom.dem showing log-scaled axes. # set title "Log-scaled axes defined using 'set log'" set label 1 "This version of the plot uses\nset logscale x\nset logscale y" at graph 0.5, 0.85, 0 center norotate back nopoint set dummy jw, y set grid xtics ytics set key inside center bottom vertical Right noreverse enhanced autotitle box set samples 160, 160 set style data lines set xtics border out scale 1,0.5 nomirror set ytics border out scale 1,0.5 nomirror set ytics norangelimit 0.1 textcolor rgb "dark-violet" set y2tics border out scale 1,0.5 nomirror set y2tics norangelimit autofreq textcolor rgb "#56b4e9" set xlabel "jw (radians)" set ylabel "magnitude of A(jw)" set y2label "Phase of A(jw) (degrees)" # set xrange [ 1.1 : 90000.0 ] noextend set yrange [ 0.1 : 1.0 ] # set log x set log y set ytics nolog # A(jw) = ({0,1}*jw/({0,1}*jw+p1)) * (1/(1+{0,1}*jw/p2)) p1 = 10 p2 = 10000 # plot abs(A(jw)) lt 1, 180/pi*arg(A(jw)) axes x1y2 lt 3 pause -1 "<cr> to continue" set title "Log-scaled axes defined using 'set nonlinear'" set label 1 "The same plot except that 'set logscale' is replaced by\nset nonlinear x via log10(x) inverse 10**x\nset nonlinear y via log10(y) inverse 10**y" set nonlinear x via log10(x) inverse 10**x set nonlinear y via log10(y) inverse 10**y set xtics log set ytics nolog replot pause -1 "<cr> to continue" reset
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