problem of function handles, thx
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Zhixiao
on 14 Jan 2015
Commented: Sean de Wolski
on 15 Jan 2015
for instance,
parms=ones(2,1);
myfunc = @(parms) X.*parms(1)+Y.*parms(1);
I can directly indicate 'myfunc' in 'fmincon'. [parms,favl]=fmincon(myfunc,parms,....);
However, if I want to separately write 'myfunc' in a function script and then quote it. [parms,favl]=fmincon(myfunc,parms,....); the 'fmincon' will report 'Not enough input in myfunc'.
X and Y are variables stored in workspace, they are not unknown parameters, only parms(1) and parms(2) required estimation.
anyone can tell me how to solve this problem? many thanks!
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Sean de Wolski
on 14 Jan 2015
Edited: Sean de Wolski
on 14 Jan 2015
You need an @ before myfunc, otherwise it tries to evaluate it:
@myfunc % reference to function myfunc; do not evaluate
myfunc % when myfunc is its own file tries to run it
myfunc % when myfunc is a function handle (variable), then myfunc is already a reference to whatever
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