How do I store values from a function in an array within a for loop?

for i=119:0.1:125
    Shift_Vm= GHK(Nai,Ki,Cli,i,Ko,Clo,P_RestNa,P_RestK,P_RestCl);
    x(i)=Shift_Vm
end
plot(x)

I am getting the error:Array indices must be positive integers or logical values.

Error in Nicole_HW2 (line 31)

x(i)=Shift_Vm

How do I store each value of Shift_Vm to an array so I can plot it

Answer 1

[Guillaume]

something = 119:0.1:125;  %give this variable a better name, a name that actually describes what the variable contain
x = zeros(size(something));  %preallocate the output for efficiency
for i = 1:numel(something)
    x(i) = GHK(Nai,Ki,Cli,something(i),Ko,Clo,P_RestNa,P_RestK,P_RestCl);
end

[Nicole Mezher]

Thank you, it worked. One quick thing, How can I plot my results as the steps being the x axis and the values from the function being the y axis. I tried it but I keep getting the wrong graph as a result

[Guillaume]

plot(something, x);

Naming the result something else than x may make more sense.