How to plot the line of best fit?

%Project Design %Yellow Band Displacemnt=[0 4 8 12 16 20 24 28 32]; Force = [0 .23 .36 .43 .52 .64 .78 .85 .92]; plot(Displacemnt, Force, 'x') title ('Displacement vs Force'); xlabel('Displacement'); ylabel('Force'); grid zoom on

[Khalil]

%Project Design

%Yellow Band

Displacemnt=[0 4 8 12 16 20 24 28 32];

Force = [0 .23 .36 .43 .52 .64 .78 .85 .92];

plot(Displacemnt, Force, 'x')

title ('Displacement vs Force');

xlabel('Displacement');

ylabel('Force');

grid on

zoom on

[Khalil]

polyfit(displacement, force, 1)

is not working.

[Shashank Prasanna]

Please format your code using the Code button when you post

Answer 1

[Shashank Prasanna]

What do you mean when you say it is not working? Do you get an error?

D = [0 4 8 12 16 20 24 28 32];
F = [0 .23 .36 .43 .52 .64 .78 .85 .92];  
plot(D,F,'.b')
p = polyfit(D,F,1)
f = polyval(p,D);
hold on
plot(D,f,'--r')

Is that something you are looking for?

[Khalil]

Your answer worked, thanks for your help

[Shashank Prasanna]

Please accept the answer if it helped you. Thanks.

[Kiniena]

Thank you very much!

[Justin Keener]

Is there any way to get the approximation returned when the y axis is crossed?

[PRANAY CHOWDARY]

its fine, can you give explanatin

Answer 2

[wasif saeed]

is this possible that we can display slope equation on graph .. i have 251 plot of data by a loop than i draw best fit line from every graph now i need intercept and gradient of each graph on plotting.

[Image Analyst]

Yes. Use sprintf() to create a string with the equation in it. Then use text() to place that text onto the graph/plot wherever you want it.