How can I set an axis outside the polar figure

How can i set the pola axis outside the figure and to set it to be starting from 70 not zero

the original figue is shown below

I have used the following matlab code mentioned (https://www.mathworks.com/matlabcentral/answers/518832-how-can-i-set-an-axis-outside-the-polar-figure-like-this-photo?fbclid=IwAR1wv7SMdBdUkPmGRIYmzt_n9a8GOinZ1wyPHpxx4eAINHjF1DLoRu25Ofc)

figure(2)
set(gcf,'color','w');
ax = polaraxes('Position', [0.25 0.25 0.6 0.6])
polarplot (theta,splbn(21,:));
ax.ThetaDir = 'counterclockwise';
ax.ThetaZeroLocation = 'left';
rlim([70,120])
ax.RTickLabel = [];
ticks = [-flip(ax.RTick(2:end)) ax.RTick];
a = axes('Color', 'none',...
    'XColor', 'none',...
    'Position', ax.Position,...
    'YLim', [-ax.RLim(2) ax.RLim(2)],...
    'YTick', ticks,...
    'YTickLabel', abs(ticks));
ylabel(a, 'r axis label')

the ouput of the code is shown below

how i can modify the axis to be sarting from 70 min of (rlim) not zero ?

Answer 1

[jonas]

I've modified your code. Not sure how robust this solution is, but you can try this:

figure(2)
set(gcf,'color','w');
ax = polaraxes('Position', [0.25 0.25 0.6 0.6])
ax.ThetaDir = 'counterclockwise';
ax.ThetaZeroLocation = 'left';
rlim([70,120])
ax.RTickLabel = [];
ticks = [-flip(ax.RTick(2:end)) ax.RTick];
a = axes('Color', 'none',...
    'XColor', 'none',...
    'Position', [ax.Position(1),ax.Position(2)+ax.Position(4)/2,...
    ax.Position(3),ax.Position(4)/2],...
    'YLim', [ax.RLim(1) ax.RLim(2)],...
    'YTick', ticks,...
    'YTickLabel', abs(ticks));
a_m = copyobj(a,gcf)
a_m.Position = a.Position - [0 a.Position(4),0,0];
a_m.YAxis.Direction = 'reverse';
ylabel(a, 'r axis label')
a.YAxis.Label.Position = [a.YAxis.Label.Position(1),70,0];

[zein]

Thanks for your help.

[zein]

I changed the limit to 70-130 and now the min and max value are not shown

[jonas]

Just set the RTick after line 6 in the above code. Use whatever ticks you want

...
rlim([70,130])
ax.RTick = [80 100 130]
ax.RTickLabel = [];
...

[zein]

Thanks Jonas for your help

I have modified these lines and the problem solved after adding ax.RTick

rmin=70;rmax=130;
ax.RTick = [rmin:10:rmax]
ax.RTickLabel = [];
ticks=[-rmax:10:-rmin,rmin:10:rmax];