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function [colorsOut] = PlotCno(gnssMeas,prFileName,colors)
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%[colors] = PlotCno(gnssMeas,[prFileName],[colors])
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% Plot the C/No from gnssMeas
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%
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%gnssMeas.FctSeconds = Nx1 vector. Rx time tag of measurements.
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% .Svid = 1xM vector of all svIds found in gpsRaw.
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% ...
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% .Cn0DbHz = NxM
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%
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% Optional inputs: prFileName = string with file name
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% colors, Mx3 color matrix
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%
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%Output: colors, color matrix, so we match colors each time we plot the same sv
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M = length(gnssMeas.Svid);
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N = length(gnssMeas.FctSeconds);
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if nargin<2
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prFileName = '';
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end
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if nargin<3 || any(size(colors)~=[M,3])
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colors = zeros(M,3); %initialize color matrix for storing colors
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bGotColors = false;
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else
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bGotColors = true;
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end
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timeSeconds = gnssMeas.FctSeconds-gnssMeas.FctSeconds(1);%elapsed time in seconds
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%Plot C/No
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for i=1:M
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Cn0iDbHz = gnssMeas.Cn0DbHz(:,i);
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iF = find(isfinite(Cn0iDbHz));
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if ~isempty(iF)
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ti = timeSeconds(iF(end));
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h = plot(timeSeconds,Cn0iDbHz);
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hold on
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if bGotColors
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set(h,'Color',colors(i,:));
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else
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colors(i,:) = get(h,'Color');
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end
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ts = int2str(gnssMeas.Svid(i));
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if isfinite(gnssMeas.AzDeg(i))
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ts = sprintf('%s, %03.0f^o, %02.0f^o',ts,...
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gnssMeas.AzDeg(i),gnssMeas.ElDeg(i));
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end
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text(ti,Cn0iDbHz(iF(end)),ts,'Color',colors(i,:));
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end
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end
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title('C/No in dB.Hz'),ylabel('(dB.Hz)')
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xs = sprintf('time (seconds)\n%s',prFileName);
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xlabel(xs,'Interpreter','none')
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grid on
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if nargout
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colorsOut = colors;
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end
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end %end of function PlotCno
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Copyright 2016 Google Inc.
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%
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% Licensed under the Apache License, Version 2.0 (the "License");
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% you may not use this file except in compliance with the License.
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% You may obtain a copy of the License at
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%
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% http://www.apache.org/licenses/LICENSE-2.0
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%
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% Unless required by applicable law or agreed to in writing, software
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% distributed under the License is distributed on an "AS IS" BASIS,
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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% See the License for the specific language governing permissions and
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% limitations under the License.
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