In manipulate, I display dynamic graphics (the major display) and would also like to add a couple of minor displays for dynamic data. I am looking for demos where the data are added nicely, and interactively (say the frequency of updates and other parameters are controllable), without obstructing the view. Thank you.

Quiz: For some reason the autograder does not work for me.

Ooops! Thanks. Is this an error, or a new policy?

The answer to quiz question #8 that the autograder accepts as correct looks incorrect to me. Can someone please check? Thanks!

Hi Abrita,

I cannot post my answer here so I created a cloud notebook with my answer and shared it with you. Check your gMail email.

Thanks, Rohit

Just curious. Can a local notebook retrieve a function definition made by CloudPut/CloudObject ?

I knew there is ResourceFunction , that is still experimental. But it needs internet connection all the time of the ResourceFunction usage/call. If the above is possible, I'm wondering if the (functions) definition can be 'downloaded' once.. and used throughout the local notebook lifetime.

Further to my question posted in the Chat on Wednesday, I attach a notebook as further detail here.

In a 2D FEA task I needed to do create a Piecewise function to assign Material properties to mesh regions. The mesh being generated from geometry variables (x,y) and would have many regions, most suitably generated from Mathematica expressions who themselves where created by the Mathematica code, using ToExpression and Strings assembled using Table.

This would yield expr:=f(x,y);

From which I wanted the Mathematica statement f[x,y]:=Piecewise [ expr(x,y) ] to generate the Piecewise function.

Please see the attahced code for how I worked this out, with help from Mathematica Stackexchange, but with a critical eye on what may still be wrong.

Thanks, John

Attachments:

Define a functio...nb

Thanks Daniel,
I'll look into \Formal[x] \Formal[y].

I've attached another notebook which I hope illustrates the problem I encountered.

I'd like to know if there is a correct way to define a function f[x,y] from an expression such as expr = x+y when they are typed into an input field as f[x,y]:= epxr

Thanks.

Attachments:

Define a functio...nb

Hi John,

I don't quite understand your first point about parsing... Could you clarify what you mean by this?

When an options pattern is defined as options:OptionsPattern[], callling options will return a Sequence. Try evaluating the following to see what I mean:

Options[f] = {"a" -> 1, "b" -> 2};
f[options : OptionsPattern[]] := options;
f["a" -> 3, "b" -> 4]

I therefore generally wrap options in a List to make it easier to deal with. In fact, the functions FreeQ and DeleteCases will not work if they are fed a (multi-element) sequence in the first argument.

I tested for RoundingRadius instead of "RoundingRadius" because the Framed function accepts the option name without quotes. (It also accepts it with quotes.)

You are correct in both of your last points! Using Alternatives inside DeleteCases isn't necessary when there is only one case to delete, and the entire statement could be replaced with options because the rounding radius option is being taken care of by the Condition. Thanks for pointing these out – I will remove them from the notebook.

This is a reminder that Daily Study Group: Writing a Wolfram Language Function begins on Monday, September 12. It runs for just one week. Register today: https://wolfr.am/16funYdYF