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| bio | website | linkedin.com/pub/eric-brown/… |
|---|---|---|
| location | Evanston, Illinois | |
| age | ||
| visits | member for | 7 months |
| seen | 23 hours ago | |
| stats | profile views | 43 |
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Nov 29 |
comment |
Installing CRAN Packages It looks like it's possible to wget a binary package from a CRAN mirror right into the .../library directory. Now, I'm trying to figure out how to work with REvaluate itself. |
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Nov 29 |
accepted | Using a different R version with RLink |
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Nov 29 |
comment |
Using a different R version with RLink I would almost think that it would be easier under Mac/Linux. Meh. |
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Nov 29 |
revised |
Installing CRAN Packages added 892 characters in body |
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Nov 29 |
asked | Installing CRAN Packages |
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Nov 29 |
asked | Using a different R version with RLink |
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Oct 16 |
awarded | Nice Question |
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Oct 16 |
awarded | Scholar |
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Oct 16 |
accepted | Parentheses in pure functions: # & vs. ( # &) |
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Oct 16 |
asked | Parentheses in pure functions: # & vs. ( # &) |
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Oct 16 |
comment |
Why is NDSolve solving in term of two 1st order ODE slower than 2nd order? Yipper. Somewhere in the Mathematica documentation (I think Advanced NDSolve) there is a nice graphic for this. Method of Lines is for reducing PDEs -> set of ODES. But the resulting ODEs (and the ODE in the Mark's comment above) may be greater than 1st order, and then those are reduced to first order by techniques like substitution which result in as many 1st order equations as the order of the original nth order ODE. |
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Oct 15 |
comment |
Why is NDSolve solving in term of two 1st order ODE slower than 2nd order? I'm interested in this, too. I thought Mathematica automatically decomposed the 2nd order ODE into a set of 1st order ODEs, and then those are solved. Maybe reducing the order by hand, taking into account certain simplifications that only you know, gives something faster than what Mathematica can deduce. On second read: Or maybe Mathematica finds a reduction that is better than what you have accomplished. |
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Oct 15 |
comment |
Why is NDSolve solving in term of two 1st order ODE slower than 2nd order? Hi drN, this is an ODE. PDE would have something like: eqns,{var1,var2,var3}, {x,0,L}, {t,0,T} :-) |
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Oct 12 |
comment |
1D Euler Equations @drN Not Sure what you mean. I was just trying different settings. Ack, yours is full of errors. = where there should be ==, {r,v,e} should be the variables, etc. Dale's code looks fine to me, though, don't know why it doesn't work. |
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Oct 10 |
comment |
Problem with Estimating the parameters value of gamma distribution Sorry, folks, I did not see your comments before I made my post and my edits. |
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Oct 10 |
comment |
Problem with Estimating the parameters value of gamma distribution @b.gatessucks Sorry, I did not see your comments. |
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Oct 10 |
revised |
Problem with Estimating the parameters value of gamma distribution added 645 characters in body |
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Oct 10 |
answered | Problem with Estimating the parameters value of gamma distribution |
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Oct 10 |
revised |
Different results for MaximumLikelihood depending on method? added 8 characters in body |
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Oct 10 |
revised |
Different results for MaximumLikelihood depending on method? added 47 characters in body |
