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acer

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20 years, 46 days
Ontario, Canada

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These are replies submitted by acer

ban on array, or Array?...

acer 32632
October 26 2007
I wonder whether there was a "ban" on using array(), rather than the newer Array(). acer

please post an example...

acer 32632
October 26 2007
Please post a specific example, so that we can see to what you are referring. acer

attributes for abstract linear algebra?...

acer 32632
October 26 2007
I find this discussion fascinating. It reminded me of an idea that I've been playing with: whether abstract linear algebra (for use with LinearAlgebra, say) might be done reasonably well using attributes. Attributes on just what,.. that I don't know. acer

interesting difference...

acer 32632
October 26 2007
0 0
I tried this in both Maple 11.00 and 10.06, just for fun. In 10.06 it ran longer and seemed to use more memory. Interestingly, in 11.00 I saw no garbage collection messages while in 10.06 I did see gc update messages. I'm not sure how to reconcile that with more apparent memory consumption/use in 10.06. acer

interesting difference...

acer 32632
October 26 2007
I tried this in both Maple 11.00 and 10.06, just for fun. In 10.06 it ran longer and seemed to use more memory. Interestingly, in 11.00 I saw no garbage collection messages while in 10.06 I did see gc update messages. I'm not sure how to reconcile that with more apparent memory consumption/use in 10.06. acer

hardware scalar floats...

acer 32632
October 26 2007
0 0
I'm not sure what it means, to be "first class objects" in Maple. Hardware scalar floats can exist stand-alone. But they'll only come into being (apart from when using their constructor explicitly) within a proc with option hfloat. > kernelopts(version); Maple 11.00, X86 64 LINUX, Feb 16 2007 Build ID 277223 > x:=HFloat(1.2); x := 1.19999999999999996 > dismantle(%); HFLOAT(2): 1.2 Also, see ?option_hfloat acer

hardware scalar floats...

acer 32632
October 26 2007
I'm not sure what it means, to be "first class objects" in Maple. Hardware scalar floats can exist stand-alone. But they'll only come into being (apart from when using their constructor explicitly) within a proc with option hfloat. > kernelopts(version); Maple 11.00, X86 64 LINUX, Feb 16 2007 Build ID 277223 > x:=HFloat(1.2); x := 1.19999999999999996 > dismantle(%); HFLOAT(2): 1.2 Also, see ?option_hfloat acer

hmm...

acer 32632
October 25 2007
The mixture sin-Pi isn't very useful. Does one apply it, as an operator, or evaluate it at a point, or...? > k := sin-Pi; k := sin - Pi > k(1.1); 0.8912073601 - Pi(1.1) > eval(k(x),x=1.1); 0.8912073601 - Pi(1.1) How would you plot it? Distinguishing between sin-1/2 and sin-sqrt(2) seems inconsistent to me. acer

all million of them at once?...

acer 32632
October 25 2007
0 0
R[3] accesses the 3rd entry of Vector R. More abstractly, R[i] accesses the ith entry, given a positive integer i less than the upper index bound (here, 10^6). You can also extract sub-Vectors, eg. R[3..11] . If Vector R has a million entries, then how would you want to look at them? ArrayTools[AddAlongDimension](R) should sum all the entries in Vector R. acer

all million of them at once?...

acer 32632
October 25 2007
R[3] accesses the 3rd entry of Vector R. More abstractly, R[i] accesses the ith entry, given a positive integer i less than the upper index bound (here, 10^6). You can also extract sub-Vectors, eg. R[3..11] . If Vector R has a million entries, then how would you want to look at them? ArrayTools[AddAlongDimension](R) should sum all the entries in Vector R. acer

Vector, rather than list...

acer 32632
October 25 2007
0 0
I used a Vector, rather than a list, to store the final result. And I gave it a hardware datatype, just to try to keep allocation down. I don't think that I used lists at all, trying instead to use add() to sum the 12 values (at each iteration) without forming the sequences explicitly. acer

Vector, rather than list...

acer 32632
October 25 2007
I used a Vector, rather than a list, to store the final result. And I gave it a hardware datatype, just to try to keep allocation down. I don't think that I used lists at all, trying instead to use add() to sum the 12 values (at each iteration) without forming the sequences explicitly. acer

basic testing...

acer 32632
October 24 2007
Running all the built-in functions with no arguments should be done as part of basic testing and quality assurance. acer

shorter...

acer 32632
October 24 2007
> kernelopts(version); Maple 11.00, X86 64 LINUX, Feb 16 2007 Build ID 277223 > `^`(f); Execution stopped: Stack limit reached. That's 8 keystrokes, counting the return. acer

another short crash...

acer 32632
October 24 2007
A post by DJKeenan contains, `^`(`$`(x,n)); Maple 10.2 gave "Error, invalid input: ^ expects 2 arguments, but received 1" for that input. But Maple 11.00 (and 11.01 it seems) crash immediately with "Execution stopped: Stack limit reached". That's 15 keystrokes, including the return. A moderately interesting variation is this, which cuts out two keystrokes, `^`($(x, n)); acer
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