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Tony, your solution to the undefined plot problem is here:
http://www.metastocktools.com/MetaStock/noNull.txt
jose '-)
http://www.metastocktools.com
--- In equismetastock@xxxxxxxxxxxxxxx, Tony M <t4tonym@xxx> wrote:
>
>
> Dear Metastock colleagues,
>
> The "IF" function is widely used, but for many applications, the
way this function is implemented in Metastock is not completely
satisfactory. As we know, the structure is typically (for example):
IF (A > B, C, D) meaning "If condition A>B is true, then output C,
otherwise output D". Consequently, if A and B are both fully defined
at all times, and A is >B, then we get output C. What we (or at least
I) expect is that, if A is not > B, then we should ALWAYS get output
D. However this is not the case. In situations where A<=B it works
fine, but in situations where it isn't true that A>B with reason
being that either A or B is not defined, then we do not succeed in
getting the hoped-for output D. I would like to find a remedy for
this type of situation.
>
> As an example, with code "If(C>Mov(C,100,E),C,-1)", I would like to
get output -1
> if the condition C>Mov(C,100,E) is not satisfied either because of
a situation where C is <= Mov(C,100,E), or alternatively when
Mov(C,100,E) is not defined. I have tried implementing this using a
combination of the "IF" and the
> "ISDEFINED" & "ISUNDEFINED" Metastock functions, but I have not
succeeded in getting
> it to work. It is easy to code the logic for this in a programming
language such as Visual Basic, and so I would also like to implement
this in Metastock using the MDK, but I am still new to the MDK and
struggling with understanding the correct way of specifying the
required arrays in the Metastock MDK.
>
> Has anyone successfully implemented this useful alternative form of
the IF function in Metastock, either by:
> a) using a combination of the standadrd Metastock internal
functions ?, or
> b) using the MDK to write a DLL to include into Metastock as an
external function ?
>
> Hoping for help / ideas....
> best regards,
> Tony
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