poloidal_plot.m
ea846d5c10f7shear_version

poloidal_plot.m
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			function [TOPLOT] = poloidal_plot(DATA,OPTIONS)
			sq = @(x) squeeze(x);
			%% Geometry
			r0 = DATA.a;
			q0 = DATA.Q0;
			Cy = r0/q0;
			Ly = max(DATA.y) - min(DATA.y);
			n0 = Cy2pi/Ly;
			z_ = DATA.z;
			%% grid sizes
			nkx = DATA.Nkx; nky = DATA.Nky; nz = DATA.Nz;
			nx = DATA.Nx; ny = DATA.Ny;
			%% Time and frames
			FRAMES = zeros(size(OPTIONS.TIME));
			for i = 1:numel(OPTIONS.TIME)
			[~,FRAMES(i)] =min(abs(OPTIONS.TIME(i)-DATA.Ts3D));
			end
			FRAMES = unique(FRAMES);

			%% Field to plot
			switch OPTIONS.NAME
			case '\phi'
			FIELD = DATA.PHI;
			NAME = 'phi';
			case 'n_i'
			FIELD = DATA.DENS_I;
			NAME = 'ni';
			end

			%% Build poloidal plot (tor angle = 0)
			FRZ = zeros(DATA.Nx,DATA.Nz, numel(FRAMES));
			w_ = zeros(nky,nz);
			for iz = 1:nz
			for iky = 1:ny
			w_(iky,iz) = exp(1iikyn0(q0z_(iz)));
			end
			end


			for it = 1:numel(FRAMES)
			field_ = squeeze(FIELD(:,:,:,FRAMES(it)));
			spectrumKxKyZ = zeros(nkx,nky,nz);
			spectrumKxKyZ(1:nkx,:,:) = field_;
			spectrumKxKyZ((nkx+1):nx,1,:) = conj(field_(nkx:-1:2,1,:));
			spectrumKxKyZ((nkx+1):nx,2:ny,:) = conj(field_(nkx:-1:2,ny:-1:2,:));

			Fxkyz = ny*ifft(spectrumKxKyZ,[],1);
			for ix = 1:DATA.Nx
			FRZ(ix,:,it) = sq(sum(sq(Fxkyz(ix,:,:)).*w_(:,:),1));
			end
			end
			FRZ = real(FRZ);
			%grid
			[Y,X] = meshgrid(DATA.z,DATA.x);
			X__ = (X+DATA.a).*cos(Y);
			Y__ = (X+DATA.a).*sin(Y);
			X = X__;
			Y = Y__;
			%% output

			TOPLOT.FIELD = FRZ;
			TOPLOT.FRAMES = FRAMES;
			TOPLOT.X = (X);
			TOPLOT.Y = (Y);
			TOPLOT.FIELDNAME = NAME;
			TOPLOT.XNAME = '$R$';
			TOPLOT.YNAME = '$Z$';
			TOPLOT.FILENAME = [NAME,'_poloidal_phieq0'];
			TOPLOT.DIMENSIONS= [100, 100, 500, 500];
			TOPLOT.ASPECT = [1 1 1];
			TOPLOT.INTERP = OPTIONS.INTERP;

			end