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visits member for 2 years, 3 months
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Feel free to correct the grammar mistakes in my posts.


Nov
15
revised Calculating integral by Romberg Algorithm
Typo fixed :)
Nov
14
revised Calculating integral by Romberg Algorithm
added 1278 characters in body
Nov
14
revised Calculating integral by Romberg Algorithm
added 1278 characters in body
Nov
14
comment How to extract a list of available Method-s
possible duplicate of How do I get a list of allowed values for an option?
Nov
14
comment Calculating integral by Romberg Algorithm
@ShutaoTang Oh, I think that besides some minorities, Chinese always put family name ahead. For your new question, you should notice that InputForm and PrintPrecision and NumberForm etc. Only control the display of the number, it doesn't influence Precision nor Accuracy. Nevertheless, calculate with MachinePrecision and control the display with NumberForm etc. may be more close to what your text book has done, significant arithmetic is the secret recipe of Mathematica anyway.
Nov
14
answered Calculating integral by Romberg Algorithm
Nov
13
reviewed Approve suggested edit on Getting number of binary digits combinations without “forbidden” patterns
Nov
13
comment Series expansion of InterpolatingFunction obtained from NDSolve
Method -> {"FixedStep", Method -> {"ImplicitRungeKutta", "DifferenceOrder" -> 5}} is also available, there should be more, I guess.
Nov
13
comment Series expansion of InterpolatingFunction obtained from NDSolve
Seems that InterpolationOrder in NDSolve can only be set to All.
Nov
11
comment What is the best way to flatten a linked list with lists as values?
@Mr.Wizard Yeah, they all display as intended.
Nov
11
comment What is the best way to flatten a linked list with lists as values?
What font do you use? The AngelBracket simply doesn't display correctly in my browser.
Nov
11
revised Poisson PDE using FDM in Mathematica
add tag
Nov
11
revised Poisson PDE using FDM in Mathematica
modify the variable name.
Nov
11
reviewed Approve suggested edit on Using FortranForm for d0 notation?
Nov
10
answered Poisson PDE using FDM in Mathematica
Nov
10
revised Poisson PDE using FDM in Mathematica
deleted 202 characters in body
Nov
10
comment Is it possible to pipe the output of EvaluationMonitor to Excel?
Well, are you sure it's the same region?: Column@{RegionPlot[x^2 + y^2 < 0.2828427 && 0.1 < x < .2 && 0.1 < y < .2, {x, 0, 0.2828427}, {y, 0, 0.2828427}], ParametricPlot[{r Cos[\[Theta]], r Sin[\[Theta]]}, {r, 0.1, 0.2828427}, {\[Theta], 0.0, \[Pi]/2}]}
Nov
6
comment A Stupid Question Maybe - EigenNDSolve
In fact you can consider modifying the source code a little. (Add a Rationalize[……, 0] somewhere etc. )
Nov
5
comment Poisson PDE using FDM in Mathematica
Well, if you don't add @xzczd in your comment, I won't get the reminder. BTW, your new-added code is messy (and in fact broken), please press Ctrl+Shift+I to change it into InputForm before pasting it here.
Nov
5
comment A Stupid Question Maybe - EigenNDSolve
"It may be that floating point numbers should not be input as such", this explanation isn't wrong, and I think the failure will be reproduced in any version of Mathematica. To fix the problem, the easiest way is to change the floating point numbers into exact numbers i.e. change 10.5 etc. to 105/10 etc.