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Mariner

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These are replies submitted by Mariner

Off the page...

Mariner 662
October 25 2007
James, Unfortunately, the lines for a[1], b[1], etc in your post run off the page. However, solving my_deq and plotting shows a very steep logistic curve that is close to zero for t<2260 and tops out at approx 5.2 x 10^11 at t= 2302. Is this the expected logistic curve? J. Tarr

Matrix and Vector construction shortcuts...

Mariner 662
October 24 2007
It might be difficult to implement something on the lines that Doug suggested for the Matrix Construction shortcut. I wonder whether there is a subtle link, hinted at by Acer, between the shortcuts construction and the issue originally raised by John Fredstead. Could someone from Maplesoft please illuminate the whole area discussed in this thread? J. Tarr

?...

Mariner 662
October 24 2007
0 0
Jacques, Not sure what you mean. Using 1/2 in the example with Student[Calculus1][CriticalPoints](f(x)) produces [1] as the answer. Making the expression all symbolic doesn't seem to help either, the result is [0,1]. Numeric, however works using 1/2 or 0.5. J. Tarr

?...

Mariner 662
October 24 2007
Jacques, Not sure what you mean. Using 1/2 in the example with Student[Calculus1][CriticalPoints](f(x)) produces [1] as the answer. Making the expression all symbolic doesn't seem to help either, the result is [0,1]. Numeric, however works using 1/2 or 0.5. J. Tarr

different not wrong...

Mariner 662
October 23 2007
You might like to try this example from the help pages of both Maple 10 and 11 plots[densityplot](sin(x*y),x=-Pi..Pi,y=-Pi..Pi,axes=boxed,colorstyle=HUE); The results are different, but look better in Maple 11, at least to my eye. So, the change with your example probably reflects improvements rather than a bug. J. Tarr

list...

Mariner 662
October 23 2007
Please see ?Vector under parameter init, list, last sentence. Hope this helps. J. Tarr

real...

Mariner 662
October 21 2007
You could do something like this: restart; assume( f(r,z), real); is(f(r,z),real); Hope this helps. J. Tarr

Bug?...

Mariner 662
October 17 2007
0 0
This is what ?plot/tickmarks says subticks or subticks=t Control the display of subticks between tickmarks or gridlines. The value t can be true (default subticks are displayed), false (no subticks are displayed), or a non-negative integer specifying the exact number of subticks between two gridlines or tickmarks. There are usually 8 subticks between two powers of 10 on a log scale i.e. 2,3,4,5,6,7,8 and 9. So the problem seems to be a misunderstanding rather than a bug. Hope this helps. J. Tarr

Bug?...

Mariner 662
October 17 2007
This is what ?plot/tickmarks says subticks or subticks=t Control the display of subticks between tickmarks or gridlines. The value t can be true (default subticks are displayed), false (no subticks are displayed), or a non-negative integer specifying the exact number of subticks between two gridlines or tickmarks. There are usually 8 subticks between two powers of 10 on a log scale i.e. 2,3,4,5,6,7,8 and 9. So the problem seems to be a misunderstanding rather than a bug. Hope this helps. J. Tarr

unfortunate...

Mariner 662
October 15 2007
0 0
Robert, Thanks for your answer to Florian's question. However, it is unfortunate that giving p a value after solving for F results in 3 solutions, one of which should not exist. Is this a bug somewhere in the bowels of eval or solve? J. Tarr

unfortunate...

Mariner 662
October 15 2007
Robert, Thanks for your answer to Florian's question. However, it is unfortunate that giving p a value after solving for F results in 3 solutions, one of which should not exist. Is this a bug somewhere in the bowels of eval or solve? J. Tarr

selectremove and freeof...

Mariner 662
October 14 2007
0 0
Please see ?selectremove third para and example 2.12. The square brackets around it ensure the results appear as a list. Also, please see ?type/freeof. Hope these help pages make things clearer. J. Tarr

selectremove and freeof...

Mariner 662
October 14 2007
Please see ?selectremove third para and example 2.12. The square brackets around it ensure the results appear as a list. Also, please see ?type/freeof. Hope these help pages make things clearer. J. Tarr

back quotes...

Mariner 662
October 11 2007
0 0
When using this version of the if command in worksheet mode (1D input), back quotes - also known as left quotes - are needed as shown on the help page. Hope this helps. J. Tarr

back quotes...

Mariner 662
October 11 2007
When using this version of the if command in worksheet mode (1D input), back quotes - also known as left quotes - are needed as shown on the help page. Hope this helps. J. Tarr
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