How would one check for installed MATLAB toolboxes in a script/function?

Question

How would one check for installed MATLAB toolboxes in a script/function? (checking toolbox versions would also be good!) This could provide a quick and useful error messag

Answer 1

a quick way is to list the contents of the toolboxes directory:

l = ls( toolboxdir('') )

using that list (excluding a few directories: shared,local), you can find out the version installed of a toolbox using ver:

v = ver('nnet')

as a reference, here's a list of the toolboxes directory names I had:

bioinfo 
curvefit
database
gads    
ident   
images  
nnet    
optim   
pde     
signal  
stats   
wavelet