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I am working on a new DSP textbook using Python. Comments are welcome!

Started by AllenDowney January 5, 2015
On 07.01.2015 04:10, rickman wrote:

>> In English, "virii". > > If you check multiple references you will find virii as being deprecated > for viruses. In fact, it was never virii since as has already been > pointed out virus is from a latin word which has *no* plural form.
It has been pointed out wrong. The latin "virus" *has* a plural. It is "vira" (because it's gender neutral, not gender male as the -us suffix might suggest). Regards, Johannes --
>> Wo hattest Du das Beben nochmal GENAU vorhergesagt? > Zumindest nicht öffentlich!
Ah, der neueste und bis heute genialste Streich unsere gro&szlig;en Kosmologen: Die Geheim-Vorhersage. - Karl Kaos &uuml;ber R&uuml;diger Thomas in dsa <hidbv3$om2$1@speranza.aioe.org>
"gareth" <no.spam@thank.you.invalid> wrote in message 
news:m8h0s6$9aj$1@dont-email.me...
> "AllenDowney" <103119@dsprelated> wrote in message > news:TeidnYA3g-ZmSDfJnZ2dnUU7-f2dnZ2d@giganews.com... >>I am developing a textbook for a computational (as opposed to >>mathematical) >> approach to DSP, with emphasis on applications (as opposed to theory). >> I have a draft of the first 8 chapters, working on two more. I am >> publishing excepts and the supporting IPython notebooks in my blog, here: >> http://thinkdsp.blogspot.com/2015/01/january-is-dsp-month.html >> Of if you want to go straight to the book, it is here: >> http://think-dsp.com >> Comments (and corrections) are welcome! > > The plural of, "spectrum" is, "spectra", and not, "spectrums".
Notwithstanding a difference of spelling between correct English and American English, the pdf of the book does look to me to be a welcome addition to the literature.
Be more thourough in demonstrating a sinusoid.  Show it with acosf + bsinf and show how amplitude and phase of sinusoid can be steered.  I think you jumped past this a bit and it is the fundamental concept of fourier analysis.

To be a little more clear:  have them write program which shows acosf +bsinf =Ccos [f+phaseshift] and that the sinusoid is a cos [or sin] with any phase shift
On 1/7/2015 6:49 AM, Johannes Bauer wrote:
> On 07.01.2015 04:10, rickman wrote: > >>> In English, "virii". >> >> If you check multiple references you will find virii as being deprecated >> for viruses. In fact, it was never virii since as has already been >> pointed out virus is from a latin word which has *no* plural form. > > It has been pointed out wrong. > > The latin "virus" *has* a plural. It is "vira" (because it's gender > neutral, not gender male as the -us suffix might suggest).
That is not what I found from many references. Not everyone copies Wikipedia either. The second declension neuter nominative/vocative/accusative forms may generally have plurals, but virus does not. "The word has no plural in Latin as it is a mass noun, like oxygen or sunlight." -- Rick
On 07.01.2015 18:39, rickman wrote:

>>>> In English, "virii". >>> >>> If you check multiple references you will find virii as being deprecated >>> for viruses. In fact, it was never virii since as has already been >>> pointed out virus is from a latin word which has *no* plural form. >> >> It has been pointed out wrong. >> >> The latin "virus" *has* a plural. It is "vira" (because it's gender >> neutral, not gender male as the -us suffix might suggest). > > That is not what I found from many references. Not everyone copies > Wikipedia either. The second declension neuter > nominative/vocative/accusative forms may generally have plurals, but > virus does not. > > "The word has no plural in Latin as it is a mass noun, like oxygen or > sunlight."
Hm, I actually looked in my Latin-German dictionary (Stowasser). Which has a reference for singular-only words, but no such reference for "virus". Cheers, Johannes --
>> Wo hattest Du das Beben nochmal GENAU vorhergesagt? > Zumindest nicht &ouml;ffentlich!
Ah, der neueste und bis heute genialste Streich unsere gro&szlig;en Kosmologen: Die Geheim-Vorhersage. - Karl Kaos &uuml;ber R&uuml;diger Thomas in dsa <hidbv3$om2$1@speranza.aioe.org>
On 2015-01-07 12:49, Johannes Bauer wrote:
[...]
> The latin "virus" *has* a plural. It is "vira" (because it's gender > neutral, not gender male as the -us suffix might suggest).
Virus, pelagus, vulgus are all words *without* plural. The word "vira", as plural of "virus", is from 1962, used in biology by Lwoff, Horne and Tournier. bye, pg
> Regards, > Johannes >
-- piergiorgio
rule 1 of infinite rules:
nucleus = nuclei
uterus = uteri
fungus = fungi
not to mention some human parts used as swear words.

role 2:
bacterium = bacteria
forum = fora

rule 3:
focus = focuses

rule 4:
turnip = turnips
cow = cows

rule 5 & 6
fish = fish or fishes

rule 7
amoeba = amoebae
vagina = vaginae

rule 8
lolly = lollies

rule 9
index = indices

rule 10
bollocks (always a pair)

...





	 

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On 2015-01-07 20:16, kaz wrote:
> rule 1 of infinite rules: > nucleus = nuclei > uterus = uteri > fungus = fungi > not to mention some human parts used as swear words. > > role 2: > bacterium = bacteria > forum = fora > > rule 3: > focus = focuses > > rule 4: > turnip = turnips > cow = cows > > rule 5 & 6 > fish = fish or fishes > > rule 7 > amoeba = amoebae > vagina = vaginae > > rule 8 > lolly = lollies > > rule 9 > index = indices > > rule 10 > bollocks (always a pair) > > ...
As mentioned in the first post, in my language we are not so keen to touch foreign words by using plural forms which might or might not be correct. Of course, English might have different rules, but problems arise with these funny Latin words which, by themselves, do not have plural. bye, pg
> > > > > > > _____________________________ > Posted through www.DSPRelated.com >
-- piergiorgio
"Piergiorgio Sartor" 
<piergiorgio.sartor.this.should.not.be.used@nexgo.REMOVETHIS.de> wrote in 
message news:bcf0ob-ns9.ln1@lazy.lzy...

I regret having made my challenge because it has diverted attention
away from the excellence of the effort in the book.