Function of a variable

The sc value in the equation B should be function of x

sc(x) that depends on range x= 0:0.01:10

[Garmit Pant]

Can you please elaborate as to what exactly is the problem that you are facing?

[Anfal AlShehhi]

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]

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

Answer 1

[Alan Stevens]

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.

[Anfal AlShehhi]

Yes exactly. 1000/(dref*dref)

[Anfal AlShehhi]

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]

You need to define sc.

If you don't know what sc is, how is Matlab to know?