How to find values fron their location?

In the following coding i am able to find the loction of values in "elseif" command but i cant find their values. Please help me.

Thanks in advance.

sym x;
sym y;
sym n;
sym z;
sym b;
pv = xlsread('POWER PV');
p = size (pv,1);

load = xlsread('LOAD');

pemfc = xlsread('PEMFC 1');
l = size (pemfc,1);
for sun = 1:1:p  j = 1:1:l ;  
if load(sun,1) < pv (sun,1);
    x = pv(sun,1)-load (sun,1); 
    
elseif load(sun,1) > pv (sun,1);
    y = load(sun,1) - pv (sun,1);
    z = find (pemfc(j,1)> y ,1);  % it just shows the location of values. I also need thier values but i cant find it.
   
    x = -z;
    
else
    x = 0;
    
end
n(sun,1) = double (x)
end 

[Rik]

You are overwriting the load function with a variable and it looks like you want to have a loop over j as well, but that is just an array now.

You are also overwriting all the variables you're declaring as sym.

As for your specific question: you can use z to index into your variable.

[Shameer Parmar]

So as you are saying that the 'z' is location of values then you can find the value at z location as..

x = pv(z,1);

OR

x = load(z,1);

[Walter Roberson]

What is the intention of

for sun = 1:1:p  j = 1:1:l ; 

?