Homework Answers
%if any error occurs, please tell in comments
%a
data=xlsread('HW8_Data_Sheet.xlsx',2);
pressureATM=data(:,1);
temperatureK=data(:,2);
%b
coefficients=polyfit(pressureATM,temperatureK,1);
%c
yfit=polyval(coefficients,pressureATM);
%d
plot(pressureATM,temperatureK,'ro',pressureATM,temperatureK,'b')
xlabel('pressure (ATM)')
ylabel('temperature (K)')
title('Temperature vs Pressure')
%e
ybar= mean(temperatureK(:));
%f
rSqr =
(1-sum((temperatureK(:)-yfit(:)).^2))./(sum(temperatureK-ybar).^2);
fprintf('rSqr: %f\n',rSqr)
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