is this code of plotting correct?
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I wanted to create a code that load data and use it to create scatter plot,Perform a least-squares
fit of loaded data to a straight line,and also Perform a least-squares fit of this
data to a parabola. I also want to plot it on the same plot for comparasion. can you tell me if this is correct.
THIS IS THE CODE I WROTE
load samples
%create a scatter plot
scatter(t,y)
title('Scatter data plot')
xlabel('T')
ylabel('Y')%create a least-square fit of date to a straight line
hold on
plot(polyfit(t,y,1));
hold on
plot(polyfit(t,y,2));
hold off
%the fit is better with the parabola than it is with the line
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KSSV
le 19 Mar 2021
load samples
% Fit a line to data
p1 = polyfit(t,y,1) ;
y1 = polyval(p1,t) ;
% Fit second degree polynomial to data
p2 = polyfit(t,y,2) ;
y2 = polyval(p2,t) ;
% plot
plot(t,y,'.r')
title('Scatter data plot')
xlabel('T')
ylabel('Y')
hold on
plot(t,y1);
plot(t,y2)
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