I need help with this MATLAB code

Part $2$

We often see structures with curved elements in which the supports beneath the surface are actually formed

of a series of straight line segments. The second part of this project is to consider a polygon with points

that lie on a half circle. The task in this case is to generate the coordinate array and connectivity arrays for

the points with the flexibility to specify any number of sides on the polygon, say $n$ sides. This simulates a

truss of any shape and with any number of members.

Figure $3$: A Structural Arch

The semi$-$circular arc shown in Figure $3$ has been described by $5$ members with $6$ nodes. The coordinates

of each node can be described as a function of $R$ and $($which should be values input in the program at

the start$).$ A for loop can be used to generate the coordinates of each node. Once the coordinates have

been created, a second for loop can be used to compute the connections between each node along with the

unit vector that describes the direction of each member. The number of nodes and the radius of the arc

should be able to be varied by one small input change in the program. Plot the polygon trusses you cre$-$

ate.

Here is the code I was given to start this part:

$\%\%---------------------------------------------------------------$

$\%....$

$\%....$ PART $2$

$\%....$ Polygon

$\%....$

$\%-----------------------------------------------------------------$

$\%....$ Input problem data $($radius$,$ # of points, # of members, theta$)$

Radius $=$

nNodesPoly $=$

nMembersPoly $=$ nNodesPoly $-1$;

theta $=\%$a semi$-$circular arch

$\%\%..$ Use a for loop to compute the x$,$ y and z coordinates of each point and

$\%....$ create a matrix to store each point.

$\%....$ You can use the variable name "nodePoly" for the nodal coordinates of

$\%....$ the polygon.

$\%$ FINISH THIS SECTION

$\%....$ Use a for loop to compute the members or connections and the unit

$\%....$ vector for each member.

$\%....$ You can use the variable name "UnVecPoly" for the unit vectors.

$\%$ FINISH THIS SECTION

$\%\%.$Create output for command window

fprintf$(\text{'}\%$s

$\text{'},\text{'}---------------------------------------\text{'})$

fprintf$(\text{'}\%$s

$\text{'},\text{'}--------------$Polygon$------------------\text{'})$

fprintf$(\text{'}\%$s

$\text{'},\text{'}---------------------------------------\text{'})$

for $($i $=1$ : nNodesPoly$)$

fprintf$(\text{'}\%$s$\%8$i$\%8\mathrm{.}3$f$\%8\mathrm{.}3$f$\%8\mathrm{.}3$f

$\text{'},\text{'}$ Node: $\text{'},$ nodePoly$($i$,$:$)\text{'})$

end

fprintf$(\text{'}$

$\text{'})$

for $($i $=1$ : nMembersPoly$)$

fprintf$(\text{'}\%$s$\%8$i$\%8\mathrm{.}3$f$\%8\mathrm{.}3$f$\%8\mathrm{.}3$f

$\text{'},\text{'}$ Unit Vector: $\text{'},$i$,$ UnVecPoly$($i$,$:$)\text{'})$

end

fprintf$(\text{'}$

$\text{'})$

$\%\%..$Create the plot

fig$3=$