Function of a variable

5 vues (au cours des 30 derniers jours)
Anfal AlShehhi
Anfal AlShehhi le 28 Juin 2022
Commenté : Alan Stevens le 28 Juin 2022
The sc value in the equation B should be function of x
sc(x) that depends on range x= 0:0.01:10
  3 commentaires
Anfal AlShehhi
Anfal AlShehhi le 28 Juin 2022
I want to write the varibale sc in Equation B as a function of x
B(x) = rhoref/ rhot * x^2/ xref^2 * exp ( -2 * atm * xref)^10^-er/10 / T * sc(x)
x is the range from 0 to 10
Alan Stevens
Alan Stevens le 28 Juin 2022
Then define
sc = @(x) ... % whatever the definition is.
But since you have set the values of x previously you could just set
sc = ... % directly in terms of x

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Réponses (1)

Alan Stevens
Alan Stevens le 28 Juin 2022
Modifié(e) : Alan Stevens le 28 Juin 2022
  1. You need to define sc before using it in B.
  2. In B you have ...1000/dref*dref.... This just means the dref va;lues cancel each other out. Did you mean ...1000/(dref*dref)...?
PS Upload the actual code, niot an image. Use the > symbol above.
  3 commentaires
Anfal AlShehhi
Anfal AlShehhi le 28 Juin 2022
Modifié(e) : Anfal AlShehhi le 28 Juin 2022
clc; clear all;
% Defined values
atm=0.17 % km-1
xt=2.3; % target (x) in m
yt=2.3; % target (y) in m
p=50/100; % percent target
vis=23; %Visibility in km target
er=26; % LRF
dref=500; % LRF in m
pref=85/100; % LRF
vis2=23; % LRF Visbility
T=90/100; % LRF
% Range
x=0:0.01:10; % in km
A= exp(-2*atm.*x) % Attenuation func
sc =
B= ((pref/p)*((x.*x)*1000/dref*dref))*(((exp((-2*atm*dref/1000))*10^(-er/10)))/(T*sc)) % Sensi func
% plotting
figure
plot(A,x.*1000,'-b')
hold on
plot(B/1000,x.*1000,'-r')
grid on
xlabel("Range in km")
ylabel("Distance in km")
title("Range Preformance")
legend('Atmospheric Attenuation','Sensitivity')
hold off
Alan Stevens
Alan Stevens le 28 Juin 2022
You need to define sc.
If you don't know what sc is, how is Matlab to know?

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