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Wikipedia plot bug
1497Just read (and slightly edited) Wikipedia article about Maple. It has a picture of a stair-type plot of
plot(ln(x+2)/(x+2), x = .716 .. .72);
I checked it and it seems to look normal in Standard Maple (so I uploaded it there), but looks bad in Classic, independently of numpoints setting (it is not mine stair-like picture there). Is it going to be fixed, or Classic Maple is deprecated?
Alec
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removed?
And now someone else has removed that example completely?
---
G A Edgar
199.71.183.2
Somebody from mhx.maplesoft.com with that IP address, 199.71.183.2 did that. His (or her) usual edits are removing material, and he (or she) already got a few warnings there, creating for Maplesoft a reputation of vandals.
I think of blocking that IP address in Maple Wiki (but that might make it to be completely unaccessable from Maplesoft network.) Edit: just did that.
From other point of view, it would be better to have some more useful (and nice looking) plot there.
Alec
tststs ...
böse junx ...
You would need a range, cf whois.domaintools.com/199.71.183.2
I doubt that it would help, since there would always be a private way (with IP through provider)
MoinMoin
I hope I won't have to block the whole Canada :)
Fortunately, with MoinMoin that we are using, the damage can be done only temporarily - everything is saved and logged, and can be easily restored.
Alec
Talk:Maple (software)
I see at the end of Talk:Maple (software) a report on a pattern of similar "edits" lately. Just browsed Wikipedia:Vandalism, and may be the case. Whatever its technical qualification, its seems to me a childish behavior.
I see also, reading this discussion page, that several other staff members of Maplesoft are active participants in Wikipedia, eg: Will (user Redune) and DJ Clayworth. The latter says in his page: "I do a lot of vandalism reversion and recent changes patrol". Probably he is in an excelent position to revert and avoid vandalism in this page.
Conflict of Interest
Editing by Maplesoft employes of any Wikipedia pages related to Maple clearly contradicts to Wikipedia Conflict of interest policy.
Alec
not necessarily
The Wikipedia Conflict of Interest (COI) page shows that there are a number of different circumstances that might characterize COI. Spam removal and vandalism clean-up is covered under non-controversial edits and are allowed. So your statetent that editing by employees "clearly" conflicts with those COI guidelines is not necessarily true. On the other hand, whitewashing (for product promotion or to cover up well-documented criticism, say) by employees paid to do that specifically would fall under COI.
Clearing
Looking at their edits, and the comments on the discussion page, it seems to be pretty clear, whether they were paid to do that specifically, or not.
At least, some of their edits were clearly controversial - otherwise they wouldn't cause long discussions on the discussion page.
Alec
Blocking read
Alec, are you aware that you appear to have prevented anyone from Maplesoft from reading (not just writing) your MapleWIki? Was that intentional?
David Clayworth Maplesoft GUI Developer
Black list
Yes, currently Maplesoft IP address mentioned above, is blacklisted, for the reasons described above and below.
Note that it was not a single Internet vandalism event. There were a series of such events originated from that IP address, repeated after several warnings.
If there are reasons for unblocking it (such as an evidence of some internal measures preventing future Internet vandalism from that IP address), I'd like to know about them.
Alec
Edit: Today I found out that some of the changes on the Wikipedia page were restored, without apparent edit wars, That seems like a good reason to unblock the mentioned IP address. Certainly, all Maplesoft employees, as well as not Maplesoft employees, are very welcome to post and to edit other posts in Maple wiki. -Alec
noted
Noted. But the logic of it is vague. The two sites are distinct, wikipedia.org and mapleadvisor.com.
I don't understand
Frankly, I don't understand you. What do you mean?
Alec
Edit: I think I understand - you meant that if somebody wiped out a contest of a wikipedia page, that doesn't mean that he or she is going to do that in other wikis?
Unfortunately, the history proves that the things don't work like that. In the olden days, there were people writing books and people collecting those books in libraries; and there were other people (vandals) burning books and destroying libraries. That's where the term (vandalism) come from.
At the beginning of Internet, they were called "deleters" - they couldn't create anything good themselves, but they logged in to other people's ftp sites and deleted everything they could there. I run ( administered) a few ftp sites at that time and was facing that problem daily. One of possible solutions that we found at that time was to share the information about "deleters" including IP address etc. between us, and act accordingly (blocking that IP address, or, say, running a distributed DoS attack in more serious cases.) It was absolutely necessary. They never stopped themselves (unless, for instance, their computer was completely destroyed.)
Nowadays, there is a similar situation with wikis - some people create wikis and others (vandals, or saboteurs) - delete whatever they can there. That never restricts to one place - if they did that in one place, they continue everywhere they can. That's how their sick perverted minds work. There are some other than blocking the IP address ways of dealing with that, but I chose the most soft measure - just blocking the IP address. It has appeared to be effective in this particular case (at least until now).
Alec
Etymology
You might want to double check the etymology of "vandal".
:-)
quite likely Alec is not supposing that ancient eastern Germanics attacked the Wiki :-)
Bug
One issue in this plot is that the plot driver in Classic seems to use
single-precision real arithmetic. A work-around is to use
However, even there you can get numerical "staircase" effects if you are determined enough. Try
An old one and a good one...
This is an old one and a good one advice. I remember posting about such things myself here and there. That seemed to be a popular advice for 3d plots in Maple V releases 4 and 5. Is it possible that the same old (not gdi) OpenGL driver is still used as 'default' in Classic?
Alec
Plotting in the Standard Interface
Robert is correct. Even in the Standard Interface, you can get the numerical "staircase" effect in plots if you try hard enough. Avoiding this usually involves some reformulation of the problem. For example, you can increase Digits and plot -10*x^5 instead of 1-10*x^5 (using Robert's example), and then use custom labels for the axes tickmarks. I acknowledge that this is not ideal, as it involves some work for the user, but it is usually possible to get a reasonable plot with some effort. At the moment, Maple does not have an automatic way of dealing with such problems.
However, I would urge users who are plotting with the Classic Interface to give the Standard Interface a try. I understand that some users really do need to stick with the Classic Interface for various reasons, but the performance of plots in the Standard Interface has been improving steadily since Maple 9. In Maple 11, my colleagues in the GUI Group made substantial improvements to the performance of 2-D plots, and we are working on more improvements to plotting for future releases.
I myself find it relatively easy to execute a large number of plots in Maple 12. There are also so many really useful plotting features in the Standard Interface: gridlines, transparency, typesetting, true array plots, polar axes, etc. If you're still using Classic, I do hope you'll at least try executing a few plots in Standard. You may be pleasantly surprised.
Paulina Chin
Maplesoft
Plots in Standard
I agree. Plots in Standard are much better. When I do a screenshot, or export a plot for this site, I usually use Standard. It is sad though that the same improvements were not made in Classic, because other than plots (and help sometimes), Standard seems to be of little use, and copying from it to Classic (or to anything else) works poorly.
Alec
Copying plots to classic
The reason why copying plots from Standard to Classic is a problem is that Maple copies the plot structures; these get rendered using the Classic renderer, which isn't as good as the Standard.
If you want a plot in Classic that looks like standard, try copying the plot from Standard to an image tool (MS Paint works fine). Then copy the resulting image to Classic. The results are still not quite as good because some ani-aliasing is lost in the copy to the image, but it will usually be better than a Classic-generated plot.
David Clayworth Maplesoft GUI Developer
grrr
you are an advocate for that :-)
just a brute suggestion: is it possible, that the plot is done 'externally' using the unbeloved Standard interface? I remember vaguely, that Mupad (which I used before Maple) had such stuff ...
plotsetup(maplet)
Under the Classic or commandline interfaces, one should be able to issue,
Doing that makes a big difference for the output of, say, plots:-polarplot(1). Or for plots with typeset 2D Math in the caption.
A disadvantage is that control doesn't appear to return to the Classic worksheet until the pop-up plot window is dispelled.
acer
quite nice trick
I like it as I plot in a window anyway. Another disadvantage, though, is that export does not seem to work for, say, plots:-polarplot(1). I get an error box:
Dispatch
unknown element _AXISCOORDINATES
right
Right you are.
For a 2D Math typeset caption in a plot I got the popup error "TITLE must be a NAME", when trying to export from the maplet plot window under Maple's commandline interface.
The maplet plotter displayed it OK, but its Export function failed.
acer
Sockets
I remember discussing with Joe Riel in maple-assist a possibility of running a server using Sockets package, which would allow displaying in a maplet outputs of the commands entered in the command line Maple. I think, we even got a working example there. I don't have time to find the link at the moment (I have to go), but I might find it later.
Edit: Found the link.
Alec