Mac Dude

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7 years, 295 days

MaplePrimes Activity


These are replies submitted by Mac Dude

Well, in my version of Maple, 15, firing up the application anew to make sure everything else is flushed out, I get a linear plot. I do not know how to post a plot here so I cannot produce the proof; it is the same curves as in Markiyan's post above; but with a linear vertical scale.

FWIW, here is my .mapleinit file. I do not see how this would prevent logplot in display.

libname:="/Applications/Math_Calc/Maple 15/My_Maple_Libraries",libname:
plots[setoptions](axes=boxed,gridlines=true,symbolsize=20,symbol=solidcircle,font=[Palatino,Roman,14]):
UseHardwareFloats:=true:
Digits:=trunc(evalhf(Digits)):
 print("Maple Init loaded...");

Somehow logplotting is really screwed up in 15; I already had the issue that logplot will ignore, for 15 digits, everything below 10^-7. This one even Maplesoft support verified and acknowledged as a bug (fixed in 16 and not present in 14).

:-(

M.D.

Eric, thanks. I really thought that Vectors were lists... lots to learn I have!

Anyway, good to hear that I am not completely astray with my choice.

...And I already have found today one specific task that I could program using a table rather than a Vector, storing references to Vectors in fact, in a Do loop. Works like a charm.

Thanks,

M.D.

Eric, thanks. I really thought that Vectors were lists... lots to learn I have!

Anyway, good to hear that I am not completely astray with my choice.

...And I already have found today one specific task that I could program using a table rather than a Vector, storing references to Vectors in fact, in a Do loop. Works like a charm.

Thanks,

M.D.

@acer 

Ok, this will get me there. I fiddled around with the Matrix function and its documentation but wasn't able to find this way. Similarly with the angle-bracket notation.

Thanks,

 

M.D.

@acer 

Ok, this will get me there. I fiddled around with the Matrix function and its documentation but wasn't able to find this way. Similarly with the angle-bracket notation.

Thanks,

 

M.D.

Ok, so in this way I can expand the size of M. Is there also a way to append another matrix (which already exists and would have the correct dimensions)?

M.D.

Ok, so in this way I can expand the size of M. Is there also a way to append another matrix (which already exists and would have the correct dimensions)?

M.D.

@acer 

This may do what I want; I'll check it out.

M.D.

@acer 

This may do what I want; I'll check it out.

M.D.

Ok, this works, too, for my specific case. However, it appears that it simply has lowered the cut-off; if I scale my data down by 1E-8 they again disappear from the plot.

So I am ok with this particular issue, but I still see a bug, or undesirable feature, here. Is there any mechanism to file a bug report with Maplesoft?? I actually truly think this needs to be fixed.

Ok, this works, too, for my specific case. However, it appears that it simply has lowered the cut-off; if I scale my data down by 1E-8 they again disappear from the plot.

So I am ok with this particular issue, but I still see a bug, or undesirable feature, here. Is there any mechanism to file a bug report with Maplesoft?? I actually truly think this needs to be fixed.

Well, I ran the same sheet (my sheet, exactly the same that fails in Maple 15) in my old copy of Maple 12 and, guess what, it works there!!

I then ran your code in Maple 15, and it fails with the same symptom: nothing below 1E-8 gets plotted. The vector Y gets created correctly, it is the plotting that is fouled up.

So, smells like a bug in Maple 15 & I am pretty sure I run 15.01 at my home (here at work it is Maple 15.00).

What am I to do?? I don't really want to revert to Maple 12 (even though for this particular calculation I could). I consider this a rather serious issue. Is there anyway to get this fixed?? Or is there any hidden parameter that makes logplot ignore values below 1E-8??

Mac Dude.

Well, I ran the same sheet (my sheet, exactly the same that fails in Maple 15) in my old copy of Maple 12 and, guess what, it works there!!

I then ran your code in Maple 15, and it fails with the same symptom: nothing below 1E-8 gets plotted. The vector Y gets created correctly, it is the plotting that is fouled up.

So, smells like a bug in Maple 15 & I am pretty sure I run 15.01 at my home (here at work it is Maple 15.00).

What am I to do?? I don't really want to revert to Maple 12 (even though for this particular calculation I could). I consider this a rather serious issue. Is there anyway to get this fixed?? Or is there any hidden parameter that makes logplot ignore values below 1E-8??

Mac Dude.

Yes, these plot types reflect the spirit of what I am trying to achieve. The fact that I can rotate the figure is a bonus.

Thanks for the suggestion, I'll certainly study these & try to adapt them to my use.

Mac Dude

Yes, these plot types reflect the spirit of what I am trying to achieve. The fact that I can rotate the figure is a bonus.

Thanks for the suggestion, I'll certainly study these & try to adapt them to my use.

Mac Dude

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