Homework Answers
Please find the working commented code below :
---------------------------------------------------------------------------------------------------
x = [2,5,6,8,9,13,15] %declare arrays x and y
y = [7,8,10,11,12,14,15]
scatter(x,y,25,'b','*') %Plot points
P = polyfit(x,y,1); %find the coefficients using
polyfit function with 1 as parameter, to signify linear fit
yfit = P(1)*x+P(2); %define the regression line
hold on;
plot(x,yfit,'r-.'); %plot the regression line
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Please find the screenshot of the output below :
![Command Window Figure 1 >x[2,5,6,8,9, 13, 15] Eile Edit View Insert Iools Desktop Window Help 5 6 9 13 15 16 15 14 13 12 [7,8,10,11,12,14, 15] 10 11 12 14 15 >scatter (x,y,25, b,*) yfitP(1)*x+P(2); plot(x,yfit,r) polyfit(x,y,1); >>hold on; 10 ans 0.6400 10 12 14 16 4 6 5.6968](http://img.homeworklib.com/questions/54e1d960-7546-11eb-9f2f-15666cc4884e.png?x-oss-process=image/resize,w_560)
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given data points for the case of
a) a linear monomial basis p(x)= {1 x}T .
b) a quadratic monomial basis p(x)= {1 x
x2}T .
c) a trigonometric basis p(x)= {1 cosx sinx}T
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