how to normalize output for plotting

hello, i need to figure out how to normalize the putput thats getting plotted (largest value being one, rest scaled etc.)

i'm sure there's a function for it, but the few i have tried i dont have on my matlab (things like normc() etc)

here is code, and i'll include some output as well. the variable named "normalizedvector" does in fact seem to be normalized, but i cannot get it to plot correctly

i am trying to plot the radiation pattern of a dipole, and what gets spit out dosent seem correct

clc

clear

close all

addpath c:\antennas\ewa

beta=12.5664; %

eta=377;

l=.68;

a=.00002;

ker='a';

basis='d';

d=.001;

e=2.7128 %math constant

E=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10000000,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];

output = pfield(l,a,E,ker,basis)

R=100 %meter

theta=0

d=.001683

f=1

A=zeros(1,101);

%differing vertical distance

for theta=0:.15708:pi %.01745

for k=1:1:101

A(k)=0

end

for k=1:1:101 %i have 101 slices

k;

cur=abs(output(k)); %grabs abs current at certain iteration

x=R-d*cos(theta); %defines changing distnce to point

Efield=(((1i*beta*eta*cur))/(4*pi*R))*e^((-1i)*beta*x)*e^(1i*beta*d)*sin(theta);

A(k)=abs(Efield)

A

%theta=theta+tand(d);

d=.001683+(.003366*(k-1)); %this sets the first distance half a sample up, then one slice distance up thereafter

end

%o=sum(A)

normalizedvector = (A- min(A)) / (max(A)-min(A));

o=sum(A)

%S=sum(normalizedvector,'all')

l=sum(normalizedvector(f))

%l=normalizedvector(f);

polarplot(theta,o,'*');

hold on

f=f+1;

A

normalizedvector

end

hold off

normalizedvector =

Columns 1 through 15

0 0.0425 0.0849 0.1270 0.1690 0.2106 0.2518 0.2926 0.3328 0.3724 0.4114 0.4496 0.4870 0.5235 0.5591

Columns 16 through 30

0.5937 0.6272 0.6596 0.6909 0.7208 0.7495 0.7769 0.8028 0.8273 0.8504 0.8719 0.8918 0.9102 0.9269 0.9419

Columns 31 through 45

0.9553 0.9670 0.9769 0.9851 0.9915 0.9961 0.9989 1.0000 0.9993 0.9967 0.9924 0.9863 0.9785 0.9688 0.9575

Columns 46 through 60

0.9444 0.9296 0.9131 0.8950 0.8752 0.8539 0.8752 0.8950 0.9131 0.9296 0.9444 0.9575 0.9688 0.9785 0.9863

Columns 61 through 75

0.9924 0.9967 0.9993 1.0000 0.9989 0.9961 0.9915 0.9851 0.9769 0.9670 0.9553 0.9419 0.9269 0.9102 0.8918

Columns 76 through 90

0.8719 0.8504 0.8273 0.8028 0.7769 0.7495 0.7208 0.6909 0.6596 0.6272 0.5937 0.5591 0.5235 0.4870 0.4496

Columns 91 through 101

0.4114 0.3724 0.3328 0.2926 0.2518 0.2106 0.1690 0.1270 0.0849 0.0425 0

Answer 1

[VBBV]

o=A./sum(A)
%S=sum(normalizedvector,'all')
%l=sum(normalizedvector(f))
%l=normalizedvector(f);
polarplot(theta,o,'*');

Normalize o relative to A vector in your loop

[VBBV]

theta = linspace(0,pi,length(A))
for i=1:length(theta)
	...
	 x=R-d*cos(theta(i)); %defines changing distnce to point
    Efield=(((1i*beta*eta*cur))/(4*pi*R))*e^((-1i)*beta*x)*e^(1i*beta*d)*sin(theta(i));
	 ...
end

when plotting, make theta and o of same size as above

[neil whitesell]

thank you, it seems to giveme the correct answer, i will give you thumbs up and accept. i'm trying to figure out why the values on the polar plot are so small though, like .013 etc., any idea why that is?

[VBBV]

%f true
polarplot(theta*pi/180,o*pi/180,'*');

Multiply with pi/180 to get right values

[neil whitesell]

tha didnt work, just gave me one filled in arc

[VBBV]

Can you share the snapshot of the two plots before and after multiplying pi/180 ?

[neil whitesell]

firstone is what you originally gave me, it miiiiight be correct but has strange numbers like .01 and such under plot, mgiht be too low.

the secind one is after applying the pi/180