how to delete variable or clear the workspace

imagesensor123,

Are you associating the variables with the windows? Or are they just global?

If they are global,

you can make them undefined by declaring them as unbound.

If list_variable is a variable you have declared and now want to delete it,

delete the same by declaring it as unbound.

list_variable=`unbound;

Hope that was helpful

Hi naavika,

    thanks for your replying, i define some variable which is used to store some data, such as "matrix" or "form" with some fields, i try to delete them, i think they are global variables, do you mean that i can clear the memory by using the "unbound" function?  

SKILL will garbage collect memory when it needs to. If you have objects which are no longer referred to, these are available for garbage collection - usually before it tries to allocate any more space for a particular type of object. Note that this doesn't necessarily mean that the footprint of the virtuoso process will decrease, but it should re-use memory where it can.

It's not necessary to set it to 'unbound for this to happen - any time the data is no longer referenced, it can be reclaimed (so setting the variable to nil would have the same effect). The difference is that setting it to unbound makes it appear as if the variable doesn't exist, so if you try to refer to the variable again later, you'll get an  "undefined variable" error message.

Note you can force garbage collection by calling gc() (after removing references to the data of course), but it's not normally necessary to explicitly call the garbage collector yourself.

Regards

Andrew.