Thomas Dehaeze
6e3677eb29
Folder name is changed, rework the html templates Change the organisation.
271 lines
7.9 KiB
Matlab
271 lines
7.9 KiB
Matlab
function hpol = polar2(varargin)
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%POLAR2 Polar coordinate plot.
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% POLA2R(THETA, RHO) makes a plot using polar coordinates of
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% the angle THETA, in radians, versus the radius RHO.
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% POLAR2(THETA,RHO,R) uses the radial limits specified by the two element
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% vector R. If R is a 4-element vector, the second two elements are
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% angular limits.
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% POLAR2(THETA,RHO,S) uses the linestyle specified in string S.
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% See PLOT for a description of legal linestyles.
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% POLAR2(THETA,RHO,R,S) uses the linestyle specified in string S and the
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% radial limits in R.
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%
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% POLAR2(AX,...) plots into AX instead of GCA.
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%
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% H = POLAR2(...) returns a handle to the plotted object in H.
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%
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% Example:
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% t = 0:.01:2*pi;
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% polar2(t,sin(2*t).*cos(2*t),[-2 2], '--r');
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%
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% See also PLOT, LOGLOG, SEMILOGX, SEMILOGY.
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%
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% Copyright 2009-2012 The MathWorks, Inc.
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% Parse possible Axes input
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[cax,args,nargs] = axescheck(varargin{:});
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%error(nargchk(1,4,nargs,'struct'));
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if nargs < 1 || nargs > 4
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error('MATLAB:polar:InvalidInput', 'Requires 2 to 4 data arguments.')
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elseif nargs == 2
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theta = args{1};
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rho = args{2};
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if ischar(rho)
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line_style = rho;
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rho = theta;
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[mr,nr] = size(rho);
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if mr == 1
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theta = 1:nr;
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else
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th = (1:mr)';
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theta = th(:,ones(1,nr));
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end
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else
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line_style = 'auto';
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end
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radial_limits = [];
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elseif nargs == 1
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theta = args{1};
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line_style = 'auto';
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rho = theta;
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[mr,nr] = size(rho);
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if mr == 1
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theta = 1:nr;
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else
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th = (1:mr)';
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theta = th(:,ones(1,nr));
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end
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radial_limits = [];
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elseif nargs == 3
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if ( ischar(args{3}) )
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[theta,rho,line_style] = deal(args{1:3});
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radial_limits = [];
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else
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[theta,rho,radial_limits] = deal(args{1:3});
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line_style = 'auto';
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if ( isempty(radial_limits) )
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radial_limits = [];
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elseif ( numel(radial_limits) == 2 )
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radial_limits = [radial_limits(:); 0; 2*pi];
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elseif ( ~(numel(radial_limits) == 4) )
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error ( 'R must be a 2 element vector' );
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end
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end
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else %nargs == 4
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[theta,rho,radial_limits,line_style] = deal(args{1:4});
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if ( isempty(radial_limits) )
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radial_limits = [];
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elseif ( numel(radial_limits) == 2 )
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radial_limits = [radial_limits(:); 0; 2*pi];
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elseif ( ~(numel(radial_limits) == 4) )
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error ( 'R must be a 2 element vector' );
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end
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end
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if ischar(theta) || ischar(rho)
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error('MATLAB:polar:InvalidInputType', 'Input arguments must be numeric.');
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end
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if ~isequal(size(theta),size(rho))
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error('MATLAB:polar:InvalidInput', 'THETA and RHO must be the same size.');
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end
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% get hold state
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cax = newplot(cax);
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next = lower(get(cax,'NextPlot'));
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hold_state = ishold(cax);
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% get x-axis text color so grid is in same color
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tc = get(cax,'xcolor');
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ls = get(cax,'gridlinestyle');
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% Hold on to current Text defaults, reset them to the
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% Axes' font attributes so tick marks use them.
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fAngle = get(cax, 'DefaultTextFontAngle');
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fName = get(cax, 'DefaultTextFontName');
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fSize = get(cax, 'DefaultTextFontSize');
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fWeight = get(cax, 'DefaultTextFontWeight');
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fUnits = get(cax, 'DefaultTextUnits');
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set(cax, 'DefaultTextFontAngle', get(cax, 'FontAngle'), ...
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'DefaultTextFontName', get(cax, 'FontName'), ...
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'DefaultTextFontSize', get(cax, 'FontSize'), ...
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'DefaultTextFontWeight', get(cax, 'FontWeight'), ...
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'DefaultTextUnits','data')
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% only do grids if hold is off
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if ~hold_state
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% make a radial grid
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hold(cax,'on');
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set(cax,'dataaspectratio',[1 1 1],'plotboxaspectratiomode','auto')
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% ensure that Inf values don't enter into the limit calculation.
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%arho = abs(rho(:));
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if ( isempty(radial_limits) )
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maxrho = max(rho(rho ~= Inf));
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minrho = min(rho(rho ~= Inf));
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hhh=line([minrho minrho maxrho maxrho],[minrho maxrho maxrho minrho],'parent',cax);
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v = [get(cax,'xlim') get(cax,'ylim')];
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ticks = numel(get(cax,'ytick'));
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delete(hhh);
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% check radial limits and ticks
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rmin = v(1); rmax = v(4); rticks = max(ticks-1,2);
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if rticks > 5 % see if we can reduce the number
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if rem(rticks,2) == 0
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rticks = rticks/2;
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elseif rem(rticks,3) == 0
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rticks = rticks/3;
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end
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end
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rinc = (rmax-rmin)/rticks;
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else
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thmax = radial_limits(4);
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thmin = radial_limits(3);
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rmax = radial_limits(2);
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rmin = radial_limits(1);
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order = (10^floor(log10(rmax-rmin)));
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firstDigit = floor((rmax-rmin)/order);
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if ( firstDigit <= 1 )
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step = 0.2*order;
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elseif ( firstDigit <= 3 )
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step = 0.5*order;
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elseif ( firstDigit <= 7 )
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step = order;
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else
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step = 2*order;
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end
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rinc = step;
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%Also, make sure to drop any values outside the limits.
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if ( rmin == 0 )
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subset = rho >= -rmax & rho <= rmax & theta >= thmin & theta <= thmax;
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else
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subset = rho >= rmin & rho <= rmax & theta >= thmin & theta <= thmax;
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end
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theta = theta(subset);
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rho = rho(subset);
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end
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% define a circle
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th = 0:pi/50:2*pi;
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xunit = cos(th);
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yunit = sin(th);
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% now really force points on x/y axes to lie on them exactly
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inds = 1:(length(th)-1)/4:length(th);
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xunit(inds(2:2:4)) = zeros(2,1);
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yunit(inds(1:2:5)) = zeros(3,1);
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% plot background if necessary
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if ~ischar(get(cax,'color')),
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patch('xdata',xunit*(rmax-rmin),'ydata',yunit*(rmax-rmin), ...
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'edgecolor',tc,'facecolor',get(cax,'color'),...
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'handlevisibility','off','parent',cax);
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end
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% draw radial circles
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c82 = cos(82*pi/180);
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s82 = sin(82*pi/180);
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for i=(rmin+rinc):rinc:rmax
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hhh = line(xunit*(i-rmin),yunit*(i-rmin),'linestyle',ls,'color',tc,'linewidth',1,...
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'handlevisibility','off','parent',cax);
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text((i-rmin+rinc/20)*c82,(i-rmin+rinc/20)*s82, ...
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[' ' num2str(i)],'verticalalignment','bottom',...
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'handlevisibility','off','parent',cax)
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end
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set(hhh,'linestyle',':') % Make outer circle solid
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% plot spokes
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th = (1:6)*2*pi/12;
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cst = cos(th); snt = sin(th);
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cs = [-cst; cst];
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sn = [-snt; snt];
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line((rmax-rmin)*cs,(rmax-rmin)*sn,'linestyle',ls,'color',tc,'linewidth',1,...
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'handlevisibility','off','parent',cax)
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% annotate spokes in degrees
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rt = 1.1*(rmax-rmin);
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for i = 1:length(th)
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text(rt*cst(i),rt*snt(i),int2str(i*30),...
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'horizontalalignment','center',...
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'handlevisibility','off','parent',cax);
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if i == length(th)
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loc = int2str(0);
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else
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loc = int2str(180+i*30);
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end
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text(-rt*cst(i),-rt*snt(i),loc,'horizontalalignment','center',...
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'handlevisibility','off','parent',cax)
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end
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% set view to 2-D
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view(cax,2);
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% set axis limits
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axis(cax,(rmax-rmin)*[-1 1 -1.15 1.15]);
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setappdata( cax, 'rMin', rmin );
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else
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%Try to find the inner radius of the current axis.
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if ( isappdata ( cax, 'rMin' ) )
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rmin = getappdata( cax, 'rMin' );
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else
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rmin = 0;
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end
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end
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% Reset defaults.
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set(cax, 'DefaultTextFontAngle', fAngle , ...
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'DefaultTextFontName', fName , ...
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'DefaultTextFontSize', fSize, ...
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'DefaultTextFontWeight', fWeight, ...
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'DefaultTextUnits',fUnits );
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% transform data to Cartesian coordinates.
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xx = (rho - rmin).*cos(theta);
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yy = (rho - rmin).*sin(theta);
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% plot data on top of grid
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if strcmp(line_style,'auto')
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q = plot(xx,yy,'parent',cax);
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else
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q = plot(xx,yy,line_style,'parent',cax);
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end
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if nargout == 1
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hpol = q;
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end
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if ~hold_state
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set(cax,'dataaspectratio',[1 1 1]), axis(cax,'off'); set(cax,'NextPlot',next);
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end
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set(get(cax,'xlabel'),'visible','on')
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set(get(cax,'ylabel'),'visible','on')
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if ~isempty(q) && ~isdeployed
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makemcode('RegisterHandle',cax,'IgnoreHandle',q,'FunctionName','polar');
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end
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