VBA store arrays in public function and use it repeatedly?

[dynatang]

I coded the clustering algorithem into a excel public function.
Then VBA solver is used to adjust two parameters to reach the target.

Because most time is used in inputing a same large data file, I am wondering is there any way in VBA to read in data once into memory and use by rest of the program, like key word "common" in Fortran?
The reason is each iteration of solver need the clustering for all nodes. And end of each sub or function. VB will unlaod all arrays and memory. And my data is stored in data file. So I need to read in data every time.

 

[johnwm]

Public variable?

Good Luck
johnwm
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[dynatang]

Thanks. But even static variable does not work.

 

[johnwm]

If you declare a Public variable in a module then its value remains while the workbook is open.

In the VB editor do Insert|Module and declare a public variable in the Declarations section of the module:

Public intA As Integer


In your Workbook code page set the values for that Public variable:

Private Sub Workbook_Open()
intA = 5
End Sub

You can then use intA from any worksheet and it will retain it's value (unless changed by your code of course)

Good Luck
johnwm
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[dynatang]

I will try and let you know the result. thanks anyway.

 

[dynatang]

johnwm,
It's really working. You are right. The variables I declared work till I close the workbbok. Thanks A million.