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identity(1000)

ValeryOchkov
24-Ruby IV

identity(1000)

Try please

M:=identity(1000)
M=

My Mathcad Prime (Win XP) is dead!
Val
http://twt.mpei.ac.ru/ochkov/v_ochkov.htm
8 REPLIES 8

Yes, I see it too. identity(100) works, but not identity(1000).

Richard

On 8/19/2009 10:18:08 AM, rijackson wrote:

>Yes, I see it too.

>identity(100) works, but not

>identity(1000).

>

>Richard



I get problems with identity(59) or greater .


There's a limit, probably because it's so freaking SLOW. Identity(999) is still cranking away after 56 minutes with a dual-core 1.8GHz Athlon with XP Pro.


TTFN,
Eden

I am logging all of these.

Mona

I have the build of September 8th, and identity(1000) takes about 2 seconds.

Mona
StuartBruff
23-Emerald II
(To:mzeftel)

On 9/9/2009 12:55:09 PM, MonaZ wrote:
>I have the build of September 8th, and
identity(1000) takes >about 2 seconds.

When you say it takes about 2 seconds, Mona, is
that the time it appears to take or is that an
internal measurement?

The attached file indicates that M11 takes about
0.02 s and M14 about 0.004 s to execute
identity(1000).

The major difference between M11 and M14 lies in
how quickly M11 displays its results compared to
M14. In M11 there is little noticeable delay in
running the timer function and the display
appearing, whereas there is a substantial delay
(anywhere between 2 s to 7 s) before the result
appears in M14 (and M12 & M13). Changing the
number of runs carried out by the Timer1 function
doesn't seem to have a significant impact on the
'delay'.

One other difference is the memory consumption:
M11 remains between 50 K and 65 K, whereas M14
varies from 180 K to 522 K.

Stuart


On 9/9/2009 6:53:30 PM, stuartafbruff wrote:
>On 9/9/2009 12:55:09 PM, MonaZ wrote:
>>I have the build of September 8th, and
>identity(1000) takes >about 2 seconds.


... in fact, I'm even more puzzled now. The
attached Spirit worksheet executes identity(1000)
in ~ 0.05 s.

I'm running a dual-core Athlon 2400 under XP Home
Edition SP3 with M11 and M14 running concurrently.

Ah hah! Just had a play. I don't think it's
identity that's the problem; it's trying to display
the resultant matrix. setting N to 10 and typing
"tresult=" gives a nice 10x10 matrix; setting N to
1000 crashes Spirit or causes it to hang.

Stuart

This has been fixed.

Mona
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