I want find the reason for this error message.

I am having trouble finding the reason behind this error message. I chechked my function again and again. but do not know why it is happening.

Error: Not enough input arguments.

Error in fl (line 7)

x=round(x*10^(p-deci))*10^(deci-p);

Function:

%%round number x to normalized p-digit form
%%x=fl(x,p)
function x=fl(x,p)
format long
if x~=0
    deci=ceil(log10(abs(x)));
    x=round(x*10^(p-deci))*10^(deci-p);
end

Script:

a1=1/3; a2=1.002;
b1=(123/4)^2; b2=11.01^2;
c1=1/6 ; c2=0.01265;
d1=fl(-b1,4);
e1=fl(fl(d1+fl(sqrt(fl(fl(b1,3)-fl(fl(4*a1,3)*c1,3),3)),3)))

Answer 1

[the cyclist]

In the outermost call to fl in this line

e1=fl(fl(d1+fl(sqrt(fl(fl(b1,3)-fl(fl(4*a1,3)*c1,3),3)),3)))

you are calling with only one input argument. And if I am looking at the parentheses correctly, the same is true of at least one other call to fl.

[N/A]

Thank you.