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Aug
24
awarded  Good Answer
Aug
24
reviewed Close Constructing a grid of individual plots for data imported from a list of files
Aug
24
reviewed Close how can I plot the Normalized histogram
Aug
24
reviewed Close Simplest identity that cannot be proved by FullSimplify
Aug
24
reviewed Close Table generation with SetDelayed function
Aug
21
comment How to find numerically all roots of a function in a given range?
@ShutaoTang Try adding the options ,PlotTheme->"Classic",Frame->True to Plot.
Aug
21
comment How to find numerically all roots of a function in a given range?
Very interesting! You got a mix-up in the naming: comrade should be colleague in the expression for rts. Actually, maybe one should call it companion.
Aug
21
reviewed Close Running a function with manipulators in a popup window
Aug
21
comment Lens profile in a grid
I'm voting to close this question as off-topic because it's asking to fix code that's based on incorrect relations.
Aug
20
comment Lens profile in a grid
As @xzczd mentions, your starting equations are incorrect. Specifically, you're missing one of the in-plane magnetic field components that arise when the electric field is allowed to depend on x and y. Do you really need to use this low-level approach, or are you also interested in higher-level solutions using NDSolve? You may also want to look into RotateRight and RotateLeft.
Aug
19
comment Getting Boston Marathon Data
Perhaps you can add details of what you have already done manually, if you think it can be automated.
Aug
19
reviewed Close Scatter plot with smooth lines
Aug
19
reviewed Close Plotting data from an interpolation
Aug
19
comment Getting Boston Marathon Data
If there's no public API for automated requests, this is basically a question about hacking their form submission interface to scrape the data. Therefore, the main issue is really quite unrelated to Mathematica. Have you tried anything?
Aug
18
answered Symmetrise a complicated expression
Aug
18
comment Symmetrise a complicated expression
For non-polynomials, you can always use the method in my answer to What is the command to find function invariant?. But you seem to be looking for some kind of "visual" symmetry. This should be defined more clearly, I think.
Aug
18
comment Symmetrise a complicated expression
What would you do with an expression like Abs[Log[a/b]? I don't think the problem is well-defined in this form.
Aug
18
reviewed Reopen How to create and format a table via menu
Aug
18
answered Efficient way to apply linear function to multivariate polynomial
Aug
18
reviewed Close Fraction shortcut not working, giving strange spacing character on german keyboard