MATLAB: How to calculate Correlation coefficient ‘R’ value smae as displayed in the regression plot using Neural networks

correlation coefficent

Hi there, would anybody like to explain me how to calculate the same "R" value as displayed in grapgh kindly see attachment.

Best Answer

Read about functions regression and corr2

th = linspace(0,2*pi) ;
x1 = sin(th) ;
x2 = sin(th)+rand(size(th)) ;
plotregression(x1,x2)
% Method 1
regression(x1,x2)
% MEthod 2
corr2(x1,x2)

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MATLAB: I am trying to shade two area (Area A and B in the image below) under a curve with two different colours. Please help me out. mat file is attached.

a=importdata('robin roy.mat');
b=a.data;
x=b(22000:25830,1);
plot(x);
id = 1:length(x) ;
x(x<0)=[];
findpeaks(x);
findpeaks(x,'MinPeakHeight',1.15);
Area1 = trapz(id(1:447),x(1:447)) ;
Area2 = trapz(id(447:1815),x(447:1815)) ;
hold on
% ha1 = area(x(x<=447),'FaceColor','g');
% ha2 = area([447  x], [y(x == 447) 0], 'FaceColor','r');
ha1 = area(id(1:447),x(1:447),'FaceColor','g') ;
ha2 = area(id(447:1815),x(447:1815),'FaceColor','r') ;
hold off
A1str = sprintf('Area 1 = %6.3f', Area1);
A2str = sprintf('Area 2 = %6.3f', Area2);
legend([ha1 ha2], A1str, A2str)

MATLAB: How to design a bump on the road as shown in the figure which is the input to the transfer function?. I had an input code for bump (half sine wave) which is r=0.1sin(2pi20t) ,what code need to be added into the same input as the flat road?

th = linspace(0,3*pi) ;
r=0.1*sin(th) ; 
r(th>pi)=0 ;
plot(th,r,'linewidth',10)

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Related Solutions

MATLAB: I am trying to shade two area (Area A and B in the image below) under a curve with two different colours. Please help me out. mat file is attached.

MATLAB: How to design a bump on the road as shown in the figure which is the input to the transfer function?. I had an input code for bump (half sine wave) which is r=0.1*sin(2*pi*20*t) ,what code need to be added into the same input as the flat road?

Related Question

MATLAB: How to design a bump on the road as shown in the figure which is the input to the transfer function?. I had an input code for bump (half sine wave) which is r=0.1sin(2pi20t) ,what code need to be added into the same input as the flat road?