Regression

How can we display the regression equation (obtained by camand "fit") in the plot?

Answer 1

[the cyclist]

Here is an example:

x = (1:20)';
y = 2 + 3*x + 7*rand(20,1);

model = fit(x,y,'poly1')

figure
plot(model,x,y)

The plot command here is an "overloaded" method for cfit objects (the output of the fit command). The documentation is here: http://www.mathworks.com/help/toolbox/curvefit/plot.html

[Farz Tak]

Thanks a lot, That was helpful

Answer 2

[Richard Willey]

Try the following

X = linspace(1, 2*pi, 50);
X = X';
Y = sin(X) + randn(50,1);

foo = fit(X,Y, 'sin1');
figure1 = figure;
scatter(X,Y)
hold on
plot(foo)

% Create textbox
annotation(figure1,'textbox',...
    [0.147443514644351 0.802739726027397 0.305903765690377 0.0931506849315069],...
    'String',{[formula(foo)]},...
    'FitBoxToText','off',...
    'BackgroundColor',[1 1 1]);

[Farz Tak]

This really helps me and even save me from using text command every time. Thanks. That was exactly what I wanted to know about this question.

Answer 3

[Maria Ghani]

. i need to run regression to get coeffecient between two variables x, y . my data set is daily from 1995 to 2022 . i need monthly coeffecient between two variables . what command should i need to write please anyone help. my dat afile is attached for detail information. x regress y but how i can get for every month ?

thanks in advance