I need help to get:

1. A logarithmic radial scale positioned on the left side of the graph;
2. Reduce the font size of the theta scale (degrees);
3. Position the legend at the bottom of the graph and reduce the font size to improve graph visibility

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Problem description:

I’ve been trying to position the scale on the left side of a polar plot in Gnuplot 5.4 without success. The image I should be able to produce is something like this:

enter image description here

The best I could do was:

enter image description here

The code and most important data file to plot are below:

 set size square
 set angles degrees
 set polar
 set ttics 0,10
 set ttics norotate offset 1
 set theta clockwise right
 set mttics 3
 unset xtics
 unset ytics
 set grid polar 10. lt -1 dt 0 lw 0.5
 set border 0
 unset param
 set title ''
 set xlabel ''
 set ylabel ''
 set style data line
 set logscale r
 set rrange [1.0E-4:1.0E+1]
 set trange [0.0E+0:3.6E+2]
plot  'out.txt' using 1:2 title 'Reflectancia' with lines
replot 'out.txt' using 1:3 title 'Transmitancia' with lineslines

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Thank you very much for your attention.