How to fix Index exceeds matrix dimensions error?

clear,clc
Ts=input('What is T? ');
Vs=input('What is V? ');
WCFs=wcf(Ts,Vs);
fprintf('The Wind Chill Factor (WCF) is %.2f \n',WCFs);
YesNo=input('Do you want the table? ','s');
if strcmpi(YesNo,'Yes')==1
    T=-20:5:55;
    V=0:5:55;
   for j=1:length(T) 
       WCFg(j)=wcf(T(j),V(j));
   end
    fprintf('----------------------------------------------\n')
    fprintf('  Tempererature(F)   Wind speed(m/s)   WCF\n')
    fprintf('----------------------------------------------\n')
    for i=1:length(T)
        fprintf('  %.2f   %.2f   %.2f\n',T(i),V(i),WCFg(i))
    end
    fprintf('-----------------------------------------------\n')
end

function WCF=wcf(T,V)
WCF=35.7+0.6*T-35.7*(V^0.16)+0.43*T*(V^0.16);
end

[M]

What is exactly the error you get?

When I run your code, I find that the size of V does not match the size of T and you have a problem wen trying to acces V(j) with j=1:length(T).

[Youcef Kara]

The problem is at the line 12:

WCFg(j)=wcf(T(j),V(j));

[Youcef Kara]

Ohh you're right, that was my problem. Thank you very much !!

Answer 1

[the cyclist]

Expanding on the above comment by "M":

Your T and V vectors are defined as

T=-20:5:55;
V=0:5:55;

Notice that V has fewer element than T does. So when you get to the loop

for j=1:length(T) 
  WCFg(j)=wcf(T(j),V(j));
  ....
end

your looping variable j will get larger than the number of elements in V, and therefore that index exceeds the dimension of V when it tries to execute V(j).