lossless compression of data vi?

[R.G. Stockwell]

Greetings all!

Here is my problem, I hope someone can help:
I have an array that I write to disk. It is large, and there
are many of these data arrays (gigs and gigs of it). I
notice that I can zip it (pkzip on windows) and reduce its size
by a factor of ten. I think it would be a much nicer solution
to imbed the zipping procedure as a subvi of the write routine,
(and unzipping as a subvi in the read routine).

Does anyone have a vi that can produce a compressed file?
(or a dll that I can link in maybe?)

Also, this is data, so the compression must be lossless.


I realize I could just zip the data in a seperate process, but to have
it "invisible" to the user, and to have a standalone vi that can read
and write it woul
d be much nicer.


thanks in advance,

bob stockwell
mysurname@co-ra.com

[Peter_Prinzen]

We have your Solution, a labVIEW-Zip Interface. A demo can be found at our
website, www.xon.de (/indexe.htm)

Peter

"R.G. Stockwell" wrote:
>Greetings all!>>Here is my problem, I hope someone can help:>I have an array
that I write to disk. It is large, and there>are many of these data arrays
(gigs and gigs of it). I>notice that I can zip it (pkzip on windows) and
reduce its size>by a factor of ten. I think it would be a much nicer solution>to
imbed the zipping procedure as a subvi of the write routine,>(and unzipping
as a subvi in the read routine).>>Does anyone have a vi that can produce
a compressed file?>(or a dll that I can link in maybe?)>>Also, this is data,
so the compression must be lossless.>>>I realize I could just zip the d
ata
in a seperate process, but to have>it "invisible" to the user, and to have
a standalone vi that can read>and write it would be much nicer.>>>thanks
in advance,>>bob stockwell>mysurname@co-ra.com>>

[Chris_Dubea]

Peter,

I have done a quick check on Deja and over the course of the last two months
you have posted 16 messages in which the solution of someone's problem was the
application of one of your companies' products.

I for one find this tiresome. If you occasionally want to post a short blurb
on your products that is fine, but not everyone gets much satisfaction from
being told "I'll sell you a product for your problem" when they ask a
technical question in this forum.

Please cease. Thanks in advance.

On 30 Jun 2000 13:52:14 -0500, "Peter Prinzen" wrote:

>
>We have your Solution, a labVIEW-Zip Interface. A demo can be found at our
>website, www.xon.de (/indexe.htm)
>
>Peter
>
>"R.G. Stockwell" wrote:
>
>Greetings all!>>Here is my problem, I hope someone can help:>I have an array
>that I write to disk. It is large, and there>are many of these data arrays
>(gigs and gigs of it). I>notice that I can zip it (pkzip on windows) and
>reduce its size>by a factor of ten. I think it would be a much nicer solution>to
>imbed the zipping procedure as a subvi of the write routine,>(and unzipping
>as a subvi in the read routine).>>Does anyone have a vi that can produce
>a compressed file?>(or a dll that I can link in maybe?)>>Also, this is data,
>so the compression must be lossless.>>>I realize I could just zip the data
>in a seperate process, but to have>it "invisible" to the user, and to have
>a standalone vi that can read>and write it would be much nicer.>>>thanks
>in advance,>>bob stockwell>mysurname@co-ra.com>>

===========================================================================
Christopher Dubea Phone: (504) 847-2280
Vice President of Engineering Fax: (504) 847-2282
Moving Parts L
.L.C. email: cdubea@movingpart.com
P. O. Box 6117 URL: http://www.movingpart.com
Slidell, LA 70469-6117

[Dennis_Knutson]

I for one hope that people do not stop announcing that a commercial product
is available for what I need to perform my job. It is far more cost effective
to buy something for a couple of hundred dollars than it is to spend days
reinventing the wheel. What do you find so objectionable about someone making
a profit?

Christopher Dubea wrote:
>Peter,>>I have done a quick check on Deja and over the course of the last
two months>you have posted 16 messages in which the solution of someone's
problem was the>application of one of your companies' products.>>I for one
find this tiresome. If you occasionally want to post a short blurb>on your
products that is fine, but not everyone gets much satisfaction from>being
told "I'll sell you a product for your problem" when they ask a>technical
question in this forum.>>Please cease. Thanks in advance.>>On 30 Jun 2000
13:52:14 -0500, "Peter Prinzen" wrote:>>>>>We have
your Solution, a labVIEW-Zip Interface. A demo can be found at our>>website,
www.xon.de (/indexe.htm)>>>>Peter>>>>"R.G. Stockwell"
wrote:>>>Greetings all!>>Here is my problem, I hope someone can help:>I have
an array>>that I write to disk. It is large, and there>are many of these
data arrays>>(gigs and gigs of it). I>notice that I can zip it (pkzip on
windows) and>>reduce its size>by a factor of ten. I think it would be a
much nicer solution>to>>imbed the zipping procedure as a subvi of the write
routine,>(and unzipping>>as a subvi in the read routine).>>Does anyone have
a vi that can produce>>a compressed file?>(or a dll that I can link in maybe?)>>Also,
this is data,>>so the compression must be lossless.>>>I realize I could
just zip the data>>in a seperate process, but to have>it "invisible" to the
user, and to have>>a standalone vi that can read>and write it would be much
nicer.>>>thanks>>in advance,>>bob stockwell>mysurname@co-ra.com>>>>===========================================================================>Christopher
Dubea Phone: (504) 847-2280>Vice President of Engineering Fax: (504) 847-2282>Moving
Parts L.L.C. email: cdubea@movingpart.com >P. O. Box 6117 URL: http://www.movingpart.com>Slidell,
LA 70469-6117

[Mike T]

Christopher,

IMHO, there's nothing wrong with a one line answer that says "if you want to buy
something to solve your problem, check our website."

Not everyone reads this NG all the time. Many folks might just post a question and
hope for an answer, any answer. Just my 2 cents, and worth every penny! 8~)

Mike T

Christopher Dubea wrote:

> Peter,
>
> I have done a quick check on Deja and over the course of the last two months
> you have posted 16 messages in which the solution of someone's problem was the
> application of one of your companies' products.
>
> I for one find this tiresome. If you occasionally want to post a short blurb
> on your products that is fine, but not everyone gets much satisfaction from
> being told "I'll se
ll you a product for your problem" when they ask a
> technical question in this forum.
>
> Please cease. Thanks in advance.

[Peter_Prinzen]

Hi all

Sorry if I bother someone with a small hint regarding our products. But sometimes
I see a question regarding a problem, which is already solved (sometimes
with our tools, sometimes within the NI solution or anything else). So please
excuse if I write a mail regarding such a solution within our tools.

Peter

Christopher Dubea wrote:
>Peter,>>I have done a quick check on Deja and over the course of the last
two months>you have posted 16 messages in which the solution of someone's
problem was the>application of one of your companies' products.>>I for one
find this tiresome.
snip ...

[Reinis Kanders]

I went into quite a detail and posted someones VI to do compression not too
long ago.
I think post name was ZIP or something along those lines, so you can just
search deja for ZIP or my name since it is not a common one. Here is a link
to search: http://x68.deja.com/=sr/home_ps.shtml
If binary is not available let me know.

Reinis Kanders

"R.G. Stockwell" wrote in message
news:R7475.2504$482.508178@den-news1.rmi.net...
> Greetings all!
>
> Here is my problem, I hope someone can help:
> I have an array that I write to disk. It is large, and there
> are many of these data arrays (gigs and gigs of it). I
> notice that I can zip it (pkzip on windows) and reduce its size
> by a factor of ten. I think it would be a much nicer solution
> t
o imbed the zipping procedure as a subvi of the write routine,
> (and unzipping as a subvi in the read routine).
>
> Does anyone have a vi that can produce a compressed file?
> (or a dll that I can link in maybe?)
>
> Also, this is data, so the compression must be lossless.
>
>
> I realize I could just zip the data in a seperate process, but to have
> it "invisible" to the user, and to have a standalone vi that can read
> and write it would be much nicer.
>
>
> thanks in advance,
>
> bob stockwell
> mysurname@co-ra.com
>
>




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[Jean-Pierre Drolet]

Go on NI developper zone http://zone.ni.com
and search for "compression"; you will find the LabVIEW ZLIB Routines for
Data Compression. There are two VIs (ZLibInflate.vi and ZLibDeflate.vi) that
make a call to a DLL. I am not sure that they use the same routines as pkzip

Jean-Pierre Drolet


"R.G. Stockwell" a écrit dans le message news:
R7475.2504$482.508178@den-news1.rmi.net...
> Greetings all!
>
> Here is my problem, I hope someone can help:
> I have an array that I write to disk. It is large, and there
> are many of these data arrays (gigs and gigs of it). I
> notice that I can zip it (pkzip on windows) and reduce its size
> by a factor of ten. I think it would be a much nicer solution
> to imbed the zipping procedure as a su
bvi of the write routine,
> (and unzipping as a subvi in the read routine).
>
> Does anyone have a vi that can produce a compressed file?
> (or a dll that I can link in maybe?)
>
> Also, this is data, so the compression must be lossless.
>
>
> I realize I could just zip the data in a seperate process, but to have
> it "invisible" to the user, and to have a standalone vi that can read
> and write it would be much nicer.
>
>
> thanks in advance,
>
> bob stockwell
> mysurname@co-ra.com
>
>