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plt.m
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plt.m
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% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% 'EXTENDED' PLOT FUNCTION %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % %
% % Author: Frederic Depuydt %
% % Company: KU Leuven %
% % Contact: [email protected]; [email protected] %
% % Version: 1.0 %
% % %
% % A function that will plot X and Y data when executed. %
% % This function extends the native MATLAB plot with extra %
% % parameters. %
% % %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % FUNCTION (non-static) %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % %
% % plt( 'Extended' Plot function %
% % X, Values (X axis) %
% % Y, Values (Y axis) %
% % parameter, A certain parameter %
% % value, Value for the parameter %
% % ...) %
% % %
% % Possible parameters: %
% % %
% % 'type' The type of plot %
% % values: %
% % 'plot' plot style (default) %
% % 'stairs' stairs style %
% % 'stem' stem style %
% % %
% % 'downsample' Reduce number of plotted values %
% % value: Integer that represents the # samples %
% % %
% % 'range' Limit the plotted range %
% % values: %
% % [Xmin, Xmax] %
% % %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % Examples %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% % %
% % plt(X,Y,'downsample',10000); %
% % plt(X,Y,'range',[0 10]); %
% % plt(X,Y,'type','stairs'); %
% % plt(X,Y,'downsample',1000,'range',[0 100]); %
% % %
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function h = plt(X,Y,varargin)
%% Precheck
if(~exist('X','var'));error('Parameter X is missing!');end;
if(~exist('Y','var'));error('Parameter Y is missing!');end;
if(isempty(X));error('X is an empty matrix!');end;
if(isempty(Y));error('Y is an empty matrix!');end;
if(length(X)~=length(Y));error('X and Y are different lengths! \n Length X = %s \n Length Y = %s',num2str(length(X)),num2str(length(Y)));end;
%% Initialise
downsample = -1;
type = 'plot';
Xmin = 0;
Xmax = 0;
%% Reading arguments
sendargin = {};
k=1;
while ~isempty(varargin)
if(isstruct(varargin{1}))
var = varargin{1};
fields = fieldnames(var);
varargin(length(fields)*2+1:end+length(fields)*2-1)=varargin(2:end);
for i = 1:numel(fields)
varargin(i*2-1)=fields(i);
varargin{i*2}=var.(char(fields(1)));
end
elseif(ischar(varargin{1}))
switch lower(varargin{1})
case 'type'
type = varargin{2};
varargin(1:2) = [];
case 'downsample'
downsample = varargin{2};
varargin(1:2) = [];
case 'range'
Xmin = varargin{2}(1);
Xmax = varargin{2}(2);
varargin(1:2) = [];
otherwise
sendargin{k} = varargin{1}; %#ok<AGROW>
k = k+1;
varargin(1) = [];
end
else
sendargin{k} = varargin{1}; %#ok<AGROW>
k = k+1;
varargin(1) = [];
end
end
%% PART Xmin-Xmax
if(Xmin || Xmax)
if(Xmin>=Xmax);error('Xmin is bigger or equal to Xmax! \n Xmin = %s \n Xmax = %s',num2str(Xmin),num2str(Xmax));end;
L = length(X);
X0 = find([X(end:-1:2) Xmin]<=Xmin,1);
X1 = find([X(1:end-1) Xmax]>=Xmax,1);
X = X((L+1-X0):X1);
Y = Y((L+1-X0):X1);
end
%% Downsample
if(downsample~=-1)
if(mod(downsample,1)~=0);warning('Downsampling non natural! \n Downsample = %s',num2str(downsample));downsample=round(downsample);end;
if(downsample<2);warning('Downsampling under limit! \n Downsample = %s',num2str(downsample));downsample=2;end;
if(downsample<=length(X))
sx = (length(X)-1)/(downsample-1);
mx = length(X);
range = sx+1:sx:mx-sx;
range = [1,round(range + rand(1,downsample-2)*sx-sx/2),mx];
X = X(range);
Y = Y(range);
else
warning('No downsampling needed! \n Sample length = %s \n Downsample = %s',num2str(length(X)),num2str(downsample));
end
elseif(length(X)>100000)
warning('Plotting %s samples! \nUse the "downsample" parameter.',num2str(length(X)));
end
%% Plotting
switch(type)
case 'plot'
h = plot(X,Y,sendargin{:});
case 'stairs'
[stairsX,stairsY] = stairs(X,Y);
h = plot(stairsX,stairsY,sendargin{:});
case 'stem'
h = stem(X,Y,sendargin{:});
otherwise
error('Unknown type: %s',type);
end
end