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by jardino
Sat Jul 21, 2018 8:13 pm
Forum: Off topic discussion
Topic: Python and "The Economist"
Replies: 4
Views: 371

Re: Python and "The Economist"

You're quicker than me!
Alan.
by jardino
Sat Jul 21, 2018 8:10 pm
Forum: Off topic discussion
Topic: Python and "The Economist"
Replies: 4
Views: 371

Re: Python and "The Economist"

Sorry - I mis-typed the link.

Here it is:

https://www.economist.com/science-and-t ... w-audience

Alan.
by jardino
Sat Jul 21, 2018 8:00 pm
Forum: Off topic discussion
Topic: Python and "The Economist"
Replies: 4
Views: 371

Python and "The Economist"

I've just read an interesting (and amusing) article about Python in "The Economist" newspaper at: https://www.economist.com/science-and-technology/2018/07/21/python-has-brought-computer-programming-to-a-vast-new-audienc e I agree with almost all of it, except the last paragraph in the section entitl...
by jardino
Tue May 22, 2018 3:07 pm
Forum: General discussion
Topic: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?
Replies: 7
Views: 533

Re: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?

Takes 13 m 38 s on my Pi 3b+ - including digit display time. Program reports "Total time" of 458 s before digit display starts.

Alan.
by jardino
Tue May 22, 2018 11:16 am
Forum: Wolfram Language
Topic: Parallel Processing in Wolfram and Mathematica
Replies: 0
Views: 514

Parallel Processing in Wolfram and Mathematica

Parallel Processing has been available in Wolfram and Mathematica since Release 7. Recently I have happily been experimenting (well, messing about) with Parallel processing on an RPI with a silghtly old version of Raspian (I forget which). Using the $ProcessorCount command I get the expected result ...
by jardino
Thu Apr 19, 2018 3:42 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 8
Views: 1085

Re: 3B+ BLAS performance etc

Sorry, this system won't allow me to attach my simple spreadsheet file. I'll need to find a workaround.
In the meantime, here is the graph with the Pi zero results deleted, to allow better resolution of the other two devices.

Alan.
Benchmarks2.jpg
Benchmarks2.jpg (45.36 KiB) Viewed 925 times
by jardino
Thu Apr 19, 2018 8:20 am
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 8
Views: 1085

Re: 3B+ BLAS performance etc

The raw data is in a spreadsheet. I'll get it to you later.
Alan.
by jardino
Wed Apr 18, 2018 6:07 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 8
Views: 1085

Re: 3B+ BLAS performance etc

I used a good official power supply for the tests, but did not check the machine's temperature.
Alan.
by jardino
Wed Apr 18, 2018 2:54 pm
Forum: Mathematica
Topic: 3B+ BLAS performance etc
Replies: 8
Views: 1085

Re: 3B+ BLAS performance etc

By coincidence, I've been benchmarking three of my RPis that were to hand - including my3B+. Attached are my results.
Alan.
Benchmarks.jpg
Benchmarks.jpg (34.02 KiB) Viewed 1043 times
by jardino
Fri Mar 02, 2018 8:37 pm
Forum: Off topic discussion
Topic: What was your first computer?
Replies: 358
Views: 83459

Re: What was your first computer?

Well,you asked ... (I've been nervous about posting here since my first contact with a computer was probably before most people in here were born!) Anyway, it was in 1965 and was with a mainframe computer called the Honeywell 200 (H-200) - a competitor to the IBM 1401. (See photo.) H200.jpg Specific...
by jardino
Tue Feb 27, 2018 12:59 pm
Forum: Off topic discussion
Topic: [Weather] For all our UK friends...
Replies: 27
Views: 3195

Re: [Weather] For all our UK friends...

I've never been to Finland, but during my time in Norway (west coast) I was impressed by how well the Norwegians prepared for snow in winter. For a start, cars had to have snow tyres fitted from mid-October onwards. And the local farmers were issued with snow ploughs that they attached to their trac...
by jardino
Tue Feb 27, 2018 11:12 am
Forum: Mathematica
Topic: Plot a circle.
Replies: 9
Views: 2088

Re: Plot a circle.

Second Edition: ISBN-13:978-0-07-160828-2.

(Though Amazon don't believe in ISBN numbers.)

Alan.
by jardino
Tue Feb 27, 2018 9:34 am
Forum: Mathematica
Topic: Plot a circle.
Replies: 9
Views: 2088

Re: Plot a circle.

My problem in learning Mathematic is not the maths (I'm fairly competent in maths), but finding a suitable goal to work to.
I bought Schaum's outline on Mathematica, but got bored doing exercise after exercise.

Alan.
by jardino
Tue Feb 27, 2018 9:30 am
Forum: General discussion
Topic: How to label those tiny micro sd cards?
Replies: 31
Views: 12690

Re: How to label those tiny micro sd cards?

And why are they (mostly) coloured black? After they fall on my dark blue carpet, they are gone for ever - until they meet their nemesis, the vacuum cleaner. Why can't they be coloured day-glo orange or something?

Alan.
by jardino
Mon Feb 26, 2018 8:16 pm
Forum: Mathematica
Topic: Plot a circle.
Replies: 9
Views: 2088

Re: Plot a circle.

My pleasure.

I'm not a total beginner, but am still dipping my toes in the water.

Alan.
by jardino
Mon Feb 26, 2018 3:08 pm
Forum: Mathematica
Topic: Plot a circle.
Replies: 9
Views: 2088

Re: Plot a circle.

Try:
circle.jpg
circle.jpg (58.15 KiB) Viewed 1996 times
The first equals sign is important.

Have a look at the current issue of MagPi for tips.

Alan.
by jardino
Sun Feb 18, 2018 7:44 pm
Forum: Off topic discussion
Topic: How good is current AI ?
Replies: 15
Views: 2183

Re: How good is current AI ?

This week's "Economist" has a relevant article at:

https://www.economist.com/news/science- ... ve-it-must

I don't think you need a subscription to read it.

Alan.
by jardino
Fri Dec 15, 2017 10:16 am
Forum: Off topic discussion
Topic: Net Nostalgia
Replies: 2
Views: 2008

Net Nostalgia

From "The Economist": "Logging off: CompuServe "More than a few netizens, particularly of the older persuasion, will feel nostalgic today. The discussion forums on CompuServe, an online service founded nearly 50 years ago, will finally be shut down, calling time on the mother of social media. Althou...
by jardino
Mon Nov 13, 2017 5:05 pm
Forum: General discussion
Topic: Rapsberry Pi Cluster
Replies: 5
Views: 721

Re: Rapsberry Pi Cluster

Thanks, tvjon. I've downloaded the pdf (5 pages) and am about to digest it. Here's the link: https://www.google.co.uk/search?client=ubuntu&channel=fs&q=The+Glasgow+Raspberry+Pi+cloud%3A+A+scale+model+for+cloud+computing+infrastructures&ie=utf-8&oe=utf-8&gfe_rd=cr&dcr=0&ei=w88JWvW5JsaGtgeN1JVI Alan.
by jardino
Mon Nov 13, 2017 10:52 am
Forum: General discussion
Topic: Rapsberry Pi Cluster
Replies: 5
Views: 721

Re: Rapsberry Pi Cluster

Thanks indeed for that link, Pithagoros. At first I was sceptical - why do you need 750 RPis just to LEARN about cluster computing? I've found that my little cluster of 5 RPis is sufficient unto my learning needs. However, when you see that huge RPi clusters are useful vehicles for learning about cl...
by jardino
Sun Nov 12, 2017 2:41 pm
Forum: Off topic discussion
Topic: Forum time
Replies: 13
Views: 1612

Forum time

Sorry to grumble, but the forum time on the home page seems to be set at British Summer Time, not GMT.

Did someone forget to set the system clock back?

Alan.
by jardino
Thu Oct 12, 2017 8:31 pm
Forum: Off topic discussion
Topic: Burning down California
Replies: 18
Views: 3651

Re: Burning down California

I hope you stay safe, Mr Heydt.

I visited your region several years ago and thought it was lovely - to say nothing about the excellent wine!

And we need you back here in the forums!!

Alan.
by jardino
Fri Sep 15, 2017 11:18 am
Forum: General discussion
Topic: How to make blue tooth speaker to work?
Replies: 33
Views: 31830

Re: How to make blue tooth speaker to work?

I am experiencing similar problems, using two known good bluetooth audio devices and both jessie and stretch.
Alan.
by jardino
Sat Aug 05, 2017 8:56 am
Forum: Off topic discussion
Topic: IBM's world record: 330TB uncompressed data on a palm-sized tape cartridge
Replies: 15
Views: 2143

Re: IBM's world record: 330TB uncompressed data on a palm-sized tape cartridge

I have a question about IBM tape drives of the period around 1965 or so: were they able to read in reverse? The reason I ask is that my introduction to the computer industry was factory-commissioning Honeywell 204 series drives, which could read in reverse. I was told that this was a "killer" featur...
by jardino
Tue Jul 11, 2017 10:10 am
Forum: Off topic discussion
Topic: Programming Question
Replies: 22
Views: 3971

Re: Programming Question

I was in the computer business for nearly four decades and never had a need to use mathematics, other than arithmetic. When I got involved in programming close to the machine level, some facility in converting decimal numbers to and from octal and hexadecimal had to be learned, however. (In fact, du...

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