Auswertung Experiment

Database tüddelei
DBHanlder läuft gut für DIESE Datanbank struktur...
App begonnen aber weit entfernt von gutem Stand

Libs/mat2tikz/test/examples/example_bar_plot.m

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+function example_bar_plot()
+test_data =[18     0; 20     0;   21     2;    30    14;    35    34;    40    57;    45    65;    50    46;    55     9;    60     2;    65     1;    70     0];
+
+% Create figure
+figure1 = figure('Color',[1 1 1]);
+
+subplot(1,2,1)
+
+
+hb=barh(test_data(:,1),test_data(:,2),'DisplayName','Test Data');
+
+ylabel('parameter [units]');
+xlabel('#');
+legend('show','Location','northwest');
+subplot(1,2,2)
+
+
+hb=bar(test_data(:,1),test_data(:,2),'DisplayName','Test Data');
+
+xlabel('parameter [units]');
+ylabel('#');
+legend('show','Location','northwest');
+
+
+xdata=test_data(:,1);
+barWidth=test_getBarWidthInAbsolutUnits(hb);
+
+x_l=xdata-barWidth/2;
+x_u=xdata+barWidth/2;
+max_y=max(test_data(:,2))*1.2;
+x=[];
+y=[];
+for i=1:length(x_l)
+    x = [x , x_l(i),x_l(i),nan,x_u(i),x_u(i),nan];
+    y = [y,       0,max_y ,nan,0     ,max_y ,nan];
+    
+    
+end
+hold on
+plot(x,y,'r');
+
+matlab2tikz('figurehandle',figure1,'filename','example_v_bar_plot.tex' ,'standalone', true);
+
+
+    function BarWidth=test_getBarWidthInAbsolutUnits(h)
+        % astimates the width of a bar plot
+        XData_bar=get(h,'XData');
+        length_bar = length(XData_bar);
+        BarWidth= get(h, 'BarWidth');
+        if length_bar > 1
+            BarWidth = min(diff(XData_bar))*BarWidth;
+        end
+        

Libs/mat2tikz/test/examples/example_quivers.m

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+%% Quiver calculations
+% These are calculations for the quiver dimensions as implemented in MATLAB
+% (HG1) as in the |quiver.m| function.
+%
+% For HG2 and Octave, the situation might be different.
+%
+% A single quiver is defined as:
+%
+%                   C
+%                    \
+%                     \
+%  A ----------------- B 
+%                     /
+%                    /
+%                   D
+%
+% To know the dimensions of the arrow head, MATLAB defines the quantities
+%  alpha = beta = 0.33 that determine the coordinates of C and D as given below.
+
+clc; 
+clear variables;
+close all;
+
+%% Parameters
+try
+    syms x y z u v w alpha beta epsilon real
+catch
+    warning('Symbolic toolbox not found. Interpret the values with care!');
+    x = randn(); y = randn(); z = randn();
+    u = randn(); v = randn(); w = randn();
+end
+alpha = 0.33;
+beta = alpha;
+epsilon = 0;
+is2D = true;
+
+%% Coordinates as defined in MATLAB
+% Note that in 3D, the arrow head is oriented in a weird way. Let' just ignore
+% that and only focus on 2D and use the same in 3D. Due to the lack
+% of [u,v,w]-symmetry in those equations, the angle is bound to depend on the
+% length of |delta|, i.e. something we don't know beforehand.
+A = [x y z].';
+delta = [u v w].';
+B = A + delta;
+C = B - alpha*[u+beta*(v+epsilon);
+               v-beta*(u+epsilon)
+               w];
+D = B - alpha*[u-beta*(v+epsilon);
+               v+beta*(u+epsilon)
+               w];
+
+if is2D
+    A = A(1:2);
+    B = B(1:2);
+    C = C(1:2);
+    D = D(1:2);
+    delta = delta(1:2);
+end
+
+%% Calculating the angle of the arrowhead
+% Calculate the cos(angle) using the inner product
+unitVector = @(v) v/norm(v);
+cosAngleBetween = @(a,b,c) unitVector(a-b).' * unitVector(c-b);
+
+cosTwiceTheta = cosAngleBetween(C,B,D);
+if isa(cosTwiceTheta, 'sym')
+    cosTwiceTheta = simplify(cosTwiceTheta);
+end
+
+theta = acos(cosTwiceTheta) / 2
+
+radToDeg = @(rads) (rads * 180 / pi);
+
+thetaVal = radToDeg(theta)
+try
+    thetaVal = double(thetaVal)
+end
+
+% For the MATLAB parameters alpha=beta=0.33, we get theta = 18.263 degrees.
+