Why is the lsqnonlin function telling me I don't have enough input arguments?

I have the following main:

K0=[60.2,1.4,14.7,2.3e12];
[K, resnorm]= lsqnonlin(myfun, K0)

Given myfun:

function [ F ] = myfun( K ) 
d32e=[580.8045;643.367;698.974;522.9306;645.1539;672.7778;679.3988;422.6795;594.0621;715.9881;469.7453;574.4126;626.5233;758.8268];
F=PBE_FUNCTION(K)-d32e; 
end

in Matlab 2015b.

When I attempt to run the main, I get:

Not enough input arguments.

Error in myfun (line 4) F=PBE_FUNCTION(K)-d32e;

Error in Main (line 4) [K, resnorm]= lsqnonlin(myfun, K0)

How can I make it run?

(Please note that the PBE_FUNCTION uses other functions in its script, dependent on K.)

Answer 1

[Star Strider]

One problem is that you need to use ‘@’ to create a function handle for ‘myfun’ in the lsqnonlin call:

[K, resnorm]= lsqnonlin(@myfun, K0)

I cannot run your code, so I do not know is the only problem.

[Sakina]

Adding the function handle changed the error message, leading me to another error in the PBE_FUNCTION, which was then easily resolved. Thanks!

[Star Strider]

As always, my pleasure!