Hi community, I am ploting a figure and i want to center the figure in the plot

When i plot my figure it apears like a little dot with gigantic scales, I want that when the plot opens up, it opens exactly where the figure is. Here is the example:

plot(d(:,1),d(:,2),'.')

d = 1.0e+03 *

    0.0010         0
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0010   -0.0000
    0.0009   -0.0000
    0.0009   -0.0000
    0.0009   -0.0000
    0.0009   -0.0000
    0.0009   -0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0007    0.0000
    0.0007   -0.0000
    0.0007   -0.0000
    0.0007   -0.0000
    0.0007   -0.0000
    0.0007   -0.0000
    0.0007   -0.0000
    0.0007   -0.0000
    0.0007   -0.0000
    0.0006   -0.0000
    0.0006   -0.0000
    0.0006   -0.0000
    0.0006   -0.0000
    0.0006   -0.0000
    0.0006   -0.0000
    0.0006   -0.0000
    0.0006   -0.0000
    0.0005   -0.0000
    0.0005   -0.0000
    0.0005   -0.0000
    0.0005   -0.0000
    0.0005   -0.0000
    0.0005   -0.0000
    0.0005   -0.0000
    0.0005   -0.0000
    0.0004   -0.0000
    0.0004   -0.0000
    0.0004   -0.0000
    0.0004   -0.0000
    0.0004   -0.0000
    0.0004   -0.0000
    0.0004   -0.0000
    0.0004   -0.0000
    0.0003   -0.0000
    0.0003   -0.0000
    0.0003   -0.0000
    0.0003   -0.0000
    0.0003   -0.0000
    0.0003   -0.0000
    0.0003   -0.0000
    0.0003   -0.0000
    0.0003   -0.0000
    0.0002   -0.0000
    0.0002   -0.0000
    0.0002   -0.0000
    0.0002   -0.0000
    0.0002   -0.0000
    0.0002   -0.0000
    0.0002   -0.0000
    0.0002   -0.0000
    0.0002   -0.0000
    0.0002   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0001   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
    0.0000   -0.0000
         0         0
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0000    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0001    0.0000
    0.0002    0.0000
    0.0002    0.0000
    0.0002    0.0000
    0.0002    0.0000
    0.0002    0.0000
    0.0002    0.0000
    0.0002    0.0000
    0.0002    0.0000
    0.0002    0.0000
    0.0002    0.0000
    0.0003    0.0000
    0.0003    0.0000
    0.0003    0.0000
    0.0003    0.0000
    0.0003    0.0000
    0.0003    0.0000
    0.0003    0.0000
    0.0003    0.0000
    0.0003    0.0000
    0.0004    0.0000
    0.0004    0.0000
    0.0004    0.0000
    0.0004    0.0000
    0.0004    0.0000
    0.0004    0.0000
    0.0004    0.0000
    0.0004    0.0000
    0.0005    0.0000
    0.0005    0.0000
    0.0005    0.0000
    0.0005    0.0000
    0.0005    0.0000
    0.0005    0.0000
    0.0005    0.0000
    0.0005    0.0000
    0.0006    0.0000
    0.0006    0.0000
    0.0006    0.0000
    0.0006    0.0000
    0.0006    0.0000
    0.0006    0.0000
    0.0006    0.0000
    0.0006    0.0000
    0.0007    0.0000
    0.0007    0.0000
    0.0007    0.0000
    0.0007    0.0000
    0.0007    0.0000
    0.0007    0.0000
    0.0007    0.0000
    0.0007    0.0000
    0.0007    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0008    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0009    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010    0.0000
    0.0010         0
    9.9619    0.8716

Answer 1

[Image Analyst]

What's up with the last value? It's like 10,000 times as big as any of the other values. So all your values are crammed into a microscopic area near the origin because it has to expand the axes to be able to show your last value of d. Are you sure that's how you want to do it? If that value is not there, it does plot stuff you can see.

Answer 2

[Azzi Abdelmalek]

Just use

   plot(d(:,1),d(:,2))

[Azzi Abdelmalek]

What is the last point in your data?

This plot make more sens

plot(d(1:end-1,1),d(1:end-1,2),'.')

[Jacob]

Its a function that outputs x & z, i put them together in d=[x,z]

To get this data copy the function and plug in:

airf='2415' (its a character ''); N=250; AoA=alphadeg*pi/180;

function [x,z]=panelgen(airf,N,AoA)

global x global z

if length(airf)==4 c=str2num(airf(1))/100; %read max camber p=str2num(airf(2))/10; %read position of max camber t=str2num(airf(3:4))/100; %read thickness to chord ratio else error('The airfoil descriptor should have 4 characters') end

x=zeros(N+2,1); z=x; for i=1:N+1 xt=1-0.5*(1-cos(2*pi*(i-1)/N)); %calculate panel endpoint x using cos distribution %calculate y ordinate for symmetric airfoil if i==1 i==N+1 yt=0; %ensure airfoil comes back to a point. else yt=5*t*(0.2969*sqrt(xt)-0.126*xt-0.3516*xt^2+0.2843*xt^3-0.1015*xt^4); end %calculate cambeline height and angle if (c>0) if xt<=p %if forward of max caber point theta=c*2*(p-xt)/p^2; yc=c*(2*p*xt-xt^2)/p^2; else %if aft of max camber point theta=c*2*(p-xt)/(1-p)^2; yc=c*((1-2*p)+2*p*xt-xt^2)/(1-p)^2; end else %if no camber theta=0; yc=0; end %apply camber and get final airfoil shape if i-1>=0.5*N x(i)=xt-yt*sin(theta); z(i)=yc+yt*cos(theta); else x(i)=xt+yt*sin(theta); z(i)=yc-yt*cos(theta); end end %add wake panel endpoint

x(N+2)=10000*cos(AoA);

z(N+2)=10000*sin(AoA);

[Azzi Abdelmalek]

Jacob what about my previous comment?

[Jacob]

Actually plot(d(1:end-1,1),d(1:end-1,2),'.') makes more sense! Thank you very much