how to plot the function

f=0.18x+0.003xy+10

in x y plane

[Satyajit Kumar]

0.18x+0.003xy+10=0 If this has to be plotted in x y plane then

How can we do ,?

[Torsten]

fimplicit(@(x,y)0.18*x + 0.003*x.*y+10,[-1000 1000 -1000 1000])

Answer 1

[Sam Chak]

Hi @Satyajit Kumar

Follow me, type this out using this example.

Then, you put your equation that you want to plot on the x–y plane.

x = linspace(-60, 60, 1201);
y = -(20*(500 + 9*x))./(3*x);
plot(x, y)
ylim([-6000 6000]), xlabel('x'), ylabel('y')

Answer 2

[Abderrahim. B]

Try this:

clear
close all

N = 10 ;

x = -N:0.5:N;
y = x;

[X, Y] = meshgrid(x, y);

f = @(x,y)(0.18*x + 0.003*x.*y + 10) ; % Create function


% Using countouf (x y plane)
tiledlayout(2,1)
nexttile

contourf(X, Y, f(X,Y));

% Using surf (3D) plot)
nexttile
surf(X, Y, f(X,Y))

[John D'Errico]

Please don't do obvious homework assignments for students who have made no effort to do them. This teaches the student nothing, except that there will be someone who they can con into doing their homework for them. It hurts the site, because then the same student will then assume it is proper to post their homework, and then they often try to delete their question, once they realize their instructor would not wish them to be posting their homework assignments.

[Sam Chak]

Hi @Abderrahim BELISSAOUI

Just wondering, how did you get two Level badges? Looks cool though... 😎

[Satyajit Kumar]

0.18x+0.003xy+10=0

 If this has to be plotted in x y plane then
How can we do ,?

[Abderrahim. B]

@John D'Errico thanks. Will try to not answer this kind of questions.

[Abderrahim. B]

@Sam Chak have just known that I have 2 level badge, thanks for that. I am here to help . By the way your answer is not correct.

[Torsten]

@Abderrahim BELISSAOUI

By the way: Yours is also wrong.

f = @(x,y)(0.18*x + 0.003*x.*y + 10) ; % Create function

instead of

f = @(x,y)(0.18*x + 0.003*x*y + 10) ; % Create function

[Abderrahim. B]

@Torsten yes, elementwise multiplication, was a typo. Thanks

[Sam Chak]

Hi @Abderrahim BELISSAOUI

Thanks for pointing out. My original intent was to simply show @Satyajit Kumar how to plot a certain equation like this,

on the plane. Nothing more, nothing less. If fact, I even encouraged him to replace my example with the equation that he wants to plot. If you edit your Answer to fix the small issue on the code as highlighted @Torsten, I will persuade @Satyajit Kumar to accept your Answer. No worries, this is a very small issue.

Have a nice weekend.

[Abderrahim. B]

@Sam Chak got your point. In this case your answer is also correct. The small issue was just a typo and I edited my answer already. Enjoy your weekend.

[Satyajit Kumar]

To all , don't create fuss of assignment and all , Always Somewhere is starting to learn something ! so as I am ! I am trying to understand things that's all

[Torsten]

@Satyajit Kumar

Learning MATLAB primarily means trying and testing. That's what we miss in your attempts to understand the language.