My test.dat file is given below
6.78E-01 -1.907881356 -1.938152542 -1.994762712 -4.409491525 -3.707118644 -2.623559322 -1.903389831 -1.891452492 -1.880469492 -2.009079661 -1.835169492 -2.193627119
6.73E-01 -1.828333333 -1.861727273 -1.916205387 -4.308956229 -3.614276094 -2.547508418 -1.823097643 -1.811922731 -1.800939731 -1.930919529 -1.757255892 -2.114855219
6.69E-01 -1.749849498 -1.786324415 -1.838698997 -4.209765886 -3.522675585 -2.472474916 -1.743879599 -1.733456913 -1.722473913 -1.853805017 -1.680384615 -2.037137124
6.64E-01 -1.672408638 -1.711923588 -1.762222591 -4.111893688 -3.432292359 -2.398438538 -1.665714286 -1.656033831 -1.645050831 -1.777715282 -1.604534884 -1.960451827
6.60E-01 -1.595990099 -1.63850495 -1.686755776 -4.015313531 -3.34310231 -2.325379538 -1.588580858 -1.579632835 -1.568649835 -1.702630033 -1.529686469 -1.884778878
6.56E-01 -1.52057377 -1.56604918 -1.612278689 -3.92 -3.255081967 -2.253278689 -1.512459016 -1.50423382 -1.49325082 -1.628529508 -1.455819672 -1.810098361
6.51E-01 -1.446140065 -1.494537459 -1.538771987 -3.825928339 -3.168208469 -2.182117264 -1.43732899 -1.429817202 -1.418834202 -1.555394463 -1.382915309 -1.736390879
6.47E-01 -1.372669903 -1.423951456 -1.466216828 -3.733074434 -3.082459547 -2.111877023 -1.363171521 -1.356363906 -1.345380906 -1.483206149 -1.310954693 -1.66363754
6.43E-01 -1.300144695 -1.354273312 -1.394594855 -3.641414791 -2.997813505 -2.042540193 -1.289967846 -1.283855347 -1.272872347 -1.411946302 -1.239919614 -1.591819936
6.39E-01 -1.228546326 -1.285485623 -1.323888179 -3.550926518 -2.914249201 -1.974089457 -1.217699681 -1.212273415 -1.201290415 -1.341597125 -1.169792332 -1.520920128
6.35E-01 -1.157857143 -1.217571429 -1.254079365 -3.461587302 -2.831746032 -1.906507937 -1.146349206 -1.14160046 -1.13061746 -1.27214127 -1.100555556 -1.450920635
6.31E-01 -1.088059937 -1.150514196 -1.18515142 -3.373375394 -2.750283912 -1.83977918 -1.075899054 -1.071819278 -1.060836278 -1.20356183 -1.032192429 -1.381804416
6.27E-01 -1.019137931 -1.084297806 -1.117087774 -3.286269592 -2.66984326 -1.773887147 -1.006332288 -1.002913094 -0.991930094 -1.13584232 -0.96468652 -1.313554859
6.23E-01 -0.951074766 -1.018906542 -1.049872274 -3.200249221 -2.590404984 -1.708816199 -0.937632399 -0.934865555 -0.923882555 -1.068966667 -0.898021807 -1.246155763
6.19E-01 -0.883854489 -0.954325077 -0.983489164 -3.115294118 -2.511950464 -1.644551084 -0.869783282 -0.867660709 -0.856677709 -1.002919195 -0.832182663 -1.179591331
6.15E-01 -0.817461538 -0.890538462 -0.917923077 -3.031384615 -2.434461538 -1.581076923 -0.802769231 -0.801283 -0.7903 -0.937684615 -0.767153846 -1.113846154
6.12E-01 -0.751880734 -0.82753211 -0.853159021 -2.948501529 -2.357920489 -1.518379205 -0.736574924 -0.735717251 -0.724734251 -0.873248012 -0.702920489 -1.048905199
6.08E-01 -0.687097264 -0.765291793 -0.789182371 -2.86662614 -2.28231003 -1.456443769 -0.67118541 -0.670948653 -0.659965653 -0.809594833 -0.639468085 -0.984753799
6.04E-01 -0.623096677 -0.703803625 -0.725978852 -2.785740181 -2.207613293 -1.395256798 -0.606586103 -0.606962758 -0.595979758 -0.746710876 -0.576782477 -0.921377644
I use the following code in gnuplot to check the plot
set terminal postscript eps enhanced colour font 'Times-Roman,12' size 6in,5in
set output "Plot1.eps"
set xtics out scale 1.5
set ytics out scale 1.5
set tics font ", 16"
set xlabel "10^{3}{/Symbol \264} 1/T (K^{-1})" font ",16"
set ylabel "log&{t}{/Times-Italic p}_{Pu({/Times-Italic g}),Pa} " font ",16"
set key outside right top
set key maxrows 12 spacing 2.1 font ",16" width -2
plot [0.60:0.70] 'test.dat.dat' u 1:2 with points pt 1 ps 1.75 lt rgb "red" title "Maeda {/Times-Italic et al.} [7]", \
'' u 1:3 with points pt 1 ps 1.75 lt rgb "blue" title "Pu-20Zr [7]", \
'' u 1:4 with points pt 1 ps 1.75 lt rgb "dark-green" title "Pu-50Zr [7]", \
'' u 1:5 with points pt 2 ps 1.75 lt -1 title "Present work", \
'' u 1:6 with points pt 3 ps 1.75 lt -1 title "Present work", \
'' u 1:7 with points pt 4 ps 1.75 lt rgb "red" title "Alcock [16]", \
'' u 1:8 with points pt 4 ps 1.75 lt rgb "blue" title "Phipps {/Times-Italic et al.} [19]", \
'' u 1:9 with points pt 4 ps 1.75 lt rgb "dark-green" title "Mulford [20]", \
'' u 1:10 with points pt 5 ps 1.75 lt rgb "blue" title "Kent [21]", \
'' u 1:11 with points pt 5 ps 1.75 lt rgb "red" title "Ackermann and Rauh [22]", \
'' u 1:12 with points pt 5 ps 1.75 lt rgb "dark-green" title "Bradbury and Ohse [23]", \
'' u 1:13 with points pt 5 ps 1.75 lt -1 title "Kim and Hofman [24]"
The code runs well. One can see that x axis is related to temperature as 1000/temperature. Now I wanted a linked top x2-axis with temperature in K. So, for example, xrange is from 0.6 to 0.7. Then x2 axis should be from 1000/0.6 to 1000/0.7 i.e. from 1666.67 K to 1428.57 K. So I modified the code based on linkedaxes.dem.
set terminal postscript eps enhanced colour font 'Times-Roman,12' size 6in,5in
set output "Plot2.eps"
set xtics out scale 1.5
set ytics out scale 1.5
set tics font ", 16"
set xtics nomirror
set xlabel "10^{3}{/Symbol \264} 1/T (K^{-1})" font ",16"
set ylabel "log&{t}{/Times-Italic p}_{Pu({/Times-Italic g}),Pa} " font ",16"
set key outside right top
set key maxrows 12 spacing 2.1 font ",16" width -2
set link x2 via 1000./x inverse 1000./x
set x2tics out scale 1.5
set x2label "Temperature (K)" font ",16"
plot [0.60:0.70] 'test.dat' u 1:2 with points pt 1 ps 1.75 lt rgb "red" title "Maeda {/Times-Italic et al.} [7]", \
'' u 1:3 with points pt 1 ps 1.75 lt rgb "blue" title "Pu-20Zr [7]", \
'' u 1:4 with points pt 1 ps 1.75 lt rgb "dark-green" title "Pu-50Zr [7]", \
'' u 1:5 with points pt 2 ps 1.75 lt -1 title "Present work ", \
'' u 1:6 with points pt 3 ps 1.75 lt -1 title "Present work", \
'' u 1:7 with points pt 4 ps 1.75 lt rgb "red" title "Alcock [16]", \
'' u 1:8 with points pt 4 ps 1.75 lt rgb "blue" title "Phipps {/Times-Italic et al.} [19]", \
'' u 1:9 with points pt 4 ps 1.75 lt rgb "dark-green" title "Mulford [20]", \
'' u 1:10 with points pt 5 ps 1.75 lt rgb "blue" title "Kent [21]", \
'' u 1:11 with points pt 5 ps 1.75 lt rgb "red" title "Ackermann and Rauh [22]", \
'' u 1:12 with points pt 5 ps 1.75 lt rgb "dark-green" title "Bradbury and Ohse [23]", \
'' u 1:13 with points pt 5 ps 1.75 lt -1 title "Kim and Hofman [24]"
But the set link does not give the computed values on the top x2 axis. What modifications in code need to be made?
