accessing meshgrid point in a plot, calculate some value at each point and then plot those values in the entire plot using pcolor

hey friends I draw a figure (to be precise, a one line diagram of a power system) by developing matlab code. And I have certain values of a particular property (say Vi) in certain points of that figure ( to be precise i=no of bus. I have 30 buses.) I use meshgrid to create coordinate at all points of the plot. Now I need to calculate a value (say Vp) for all the points in the plot using the abovementioned value Vi at the given points, I am using the following formula

Vp=∑ (Vi/dpi2 )/∑( 1/dpi2 )

Where d = distance between point p and i

Here is my code...

for i=1:30

busc (i,1)=xyb((2*i-1),1)+(xyb(2*i,1)-xyb((2*i-1),1))/2; % x coordinate for bus center ie gives me the coordinates of the point where V is given

busc (i,2)=xyb(2*i,2); % y coordinate

end

for i=1:180 % to access meshgrid points

         for j=1:180 % to access meshgrid points
             for k=1:30 % to access all the buses
                        dist(k)=1/(((busc(k, 1) - i)^2+ (busc(k, 2) - j)^2)^0.5)^2; %for calculating the fv value
                        vvolt(k)=r.bus(k,8)./(((busc(k, 1) - i)^2+ (busc(k, 2) - j)^2)^0.5)^2;%for calculating the fv value
              end
             rr=sum(vvolt')'; %for calculating the fv value
             uu=sum(dist')'; %for calculating the fv value
             result=rr./uu;
             fvolt(i,j)=result;
         end
     end

 g= pcolor(X,Y,fvolt);
set(g,'LineStyle','none')
myColorMap = flipud(jet);
colormap(myColorMap);
colorbar; 
%set(gca,'YDir','reverse');
axis off;

MY QUESTION: I am getting points but not matching with my requirement. However if I rotate 90 degree anticlockwise, it gives me the result. Can someone please tell me how to rotate my figure by 90 degree. I just want to rotate my figure for the contouring ie for pcolor result. Not for my one line diagram.

There may be some mistake in my formula. Can someone please help me with that.