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Most looping code looks like this
retVal=NULL for i { for j { result <- *some function of vector[i] and vector[j]* retVal = rbind(retVal,result) } }
Since this is so common, is there a systematic way of translating this idiom?
Can this be extended ...
Started by Dan Goldstein on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
RetVal <- matrix(NA, ni, nj) # assuming your result is scalar for (i in 1:ni) for (j in 1:nj) retVal[i][j] <- *some function of yours*
will already... .
Then try some simple optmizations.
You are there.
The first goal should to get working code.
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As a corollary to this question I was wondering if there was good comparative studies I could consult and pass along about the advantages of using the RDMBS do the join optimization vs systematically denormalizing in order to always access a single table...
Started by Newtopian on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
This is the basis of data.
Technique of systematic denormalization that has some theory behind it.
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We are using C to build a system on ARM core (i.e. an embedded system). The question is: how can we avoid reentry problem in a formal way so that we are confident all reentry bugs are removed. This may not be a practical wish but surely important for ...
Started by CS on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
Quick fix, if you suspect something:
int some_func(int x, int y) { static volatile int do_not_enter_twice = 0; assert(!(do_not_enter_twice++)); /* some_func continued */ do_not_enter_twice--; return whatever; }
Longer answer:
Use some tool to make a call... .
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Ask your Facebook Friends
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Developing software solutions which already exist and are available for re-use (either commercial or open-source). AKA "re-inventing the wheel". Same as above, but your solution being broken. AKA "re-inventing the square wheel". Developing solutions for...
Started by Andrew from NZSG on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
You could read more about....
Doing some research beforehand (1) and investing in solid software architecture (2,3) usually helps :)
When you're planning to develop something you always need to calculate the benefits of doing some and the things like the ROI .
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I just received this email this am. Looks like the Gitzo line up has changed. Along with increased weight.
http://www.gitzo.com/news+%26+events/news/Syatematic+Tripods/20183007
February 2012
Absolute Perfection.
Gitzo introduces the new Systematic tripod...
Started by Fred Miranda on
, 16 posts
by 1 people.
Answer Snippets (Read the full thread at fredmiranda):
Maybe they finally noticed your way in to the pdf of the catalog... .
Of particular note: there's now a series 2 Systematic line.
How interesting: a pretty well devised "non admission of fault fix" on the systematic head/platform Interesting.
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I just tried to convert a level 13 Blessing of the Zephyr travel speed/endo enhancement into the +4 KB protection enhancement using the "three converter option". It gave me the Travel speed one, so I bought more converters and tried again. I tried to ...
Started by Radiac on
, 13 posts
by 11 people.
Answer Snippets (Read the full thread at cityofheroes):
So far it has taken me 6 converters each for 11 of the 12... .
Its rather annoying.
Gamblers never seem to want to change into the recharge bonus .
Sorry for your poor luck I wouldnt be surprised if the "procs" were weighted lower .
It's a randomized system.
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Horse Name.. Timeform\Sporting Life comment. Systematic Rating.. Current Odds.. Theorem.. Mathematical Price.. Win Chance %.. Overlay Value
330 Fakenham
Thats The Deal is a value bet rated at $3.88 and current odds of 11
'Won handicaps at Southwell in...
Started by shojmpa on
, 15 posts
by 3 people.
Answer Snippets (Read the full thread at mariasracingforum):
A winner at 10-1 in a chase here over....
Winner of two hurdle races and three chases from 2m 3f to 3m on good and soft ground .
Phoenix Des Mottes (FR)..
New top rated..
Delagny Gunner n\r
255 Fakenham..
Looks an interesting thread , good luck Thanks Sean.
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The full version of this tutorial, along with many others is available in the Systematic Mixing Guide, available here: http://www.systematicproductions.com/mixing-guide.htm
Beware, if you start scrolling down now you may never stop! This one is massive...
Started by Ermz on
, 25 posts
by 19 people.
Answer Snippets (Read the full thread at ultimatemetal):
Is there any way I can donate.
Hey Ermin,
I really enjoy your Systematic Mixing Series.
For me.
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This post involves the subject of double dipping (double charging) that is perpetrated by ebay and pay pal working together to systematically defraud their users. The situation I am referring to involves the final value fees charged by ebay. Let me begin...
Started by gdtrfb85 on
, 22 posts
by 20 people.
Answer Snippets (Read the full thread at ebay):
I think it wuld be cheaper for my friend to open a real store than sell only 6 items for so much ... .
The total fees were $700 for eBay and $300 for Paypal .
My friend recently oepned a paypal account and ebay account and sold 6 items .
My greatest fantasy.
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