The centroid of the bolt arrangement

im working on a school project in which given location of numbers of bolts / rivet we should find the following

1) Centroid

2) direct shear stress of rivet and shear stress of rivet due to torsional loading.

3) entroidal moment about the Z-axis,

we shold plot everything as the following

I really just started learing matlab and this is hard for me to do. any help will be appreciated

Thank you very much

[Adam Danz]

Your assignment requires knowledge of physics to solve those problems and knowledge of Matlab (or another software) to implement the solution. There are lots of experts here who can help you with both but since it's an assignment and since this is a matlab forum, why don't you start with showing us how far you've gotten, not worrying about syntax etc.

[Image Analyst]

Centroid of what?

I assume you want a numerical solution (rather than an analytical one), so what resolution do you want? For example with those green circles, how many matrix elements will be in each?

[Adam Danz]

Abdulrahman Saad's answer moved here as a comment.

Thank you all for the response

@Adam Danz i really dont know to to start the code i wrote containes the following

F =500; % applied force assuming its always horizontal

Dim= [ 5 7 5 7 ]; % diameter of each Bolt

Dis= [ 2 3 4 5 ]; % distance from the bolt to the refrence

x= [ ] ; y=[ ]; % here i must have the coordinate of each bolt

@Image Analyst

i need to calculate the centroid of the bolts ( bolts with any arrangement )

then find the Shear ( direct and torsional ) and plot every thing up.

[Adam Danz]

By centroid, do you mean center of mass? I'd be happy to help with specific matlab questions.