## How do you show values from trace function in plot...

I have made an animate-plot with trace function enabled and I was wondering if there was something I could do so it would show the value of the variable when trace reached frame x and y and plot it in the plot or maybe somewhere else.

## find out what line of code is currently running in...

Dear friends

I have a long-running code that sometimes takes an hour to complete. I wonder is there a way to find out what line of code is currently running in a long-running maple code or to show an update of the variables. I have some print commands but are shown just after completion not before.

Thank you in advance for your time.

## is it possible to trace limit() steps? Which Maple...

Any one know if it possible to see the steps used by the limit() function as one does with many other functions such as dsolve and int ?  This is what I tried

restart;
infolevel[limit]:=5;
interface(verboseproc=3);
limit(x^2 *log(x),x=0);

But I see no steps, only the final answer. Are not all Maple functions possible to trace? How does one know which functions can generate trace and which do not?

I am using Maple 2016.1

I wanted to see something like:

let x=1/t, hence expression becomes  (-ln t)/t^2, now taking limit as t->infinity. Applying L'Hopital rule, limit t->infinity of -1/(2 t^2) which gives zero.

I assumed this is something what Maple does internally, (but there are other ways also) and wanted to see what Maple does.

## Is it possible to edit or modify mla files...

I understand how Browse() works. Sometimes Maple crashes or fails for some programs. Is it possible to add print("here" ) into the the mla files in the library to identify why and where Maple fails?

Thanks

## metrics, scalar product...

Dear Friends, I work with physics paсkage. I have a quation. I don't understend how one works with metrics. For example, let:

Nice!
Very good!

1) It doesn't work. Why? (I want exactly gamma_[A,B], rather than g_[A,B], because as i guess gamma_[A,B] has a signature [1,1,1] but g_[A,B] has a signature [-1,-1,-1])

2) And how may I see what is matrices g_[A, B], gamma_[A, B] explicitly? That is I know how to see what is g_[mu, nu], for this one needs write "g_[];".  But how may I see g_[A, B] and gamma_[A, B] in explicitly forms?

3) Why command Trace(g_[mu, nu]))  does not work?"

## Why are args being changed to integers?...

The following code is part of my attempt to answer the recent Question about the bifurcation of the map f:= x-> exp(x^2*(a-x)). Two very weird things are happening. They can be seen by applying trace to f. The first is that the input argument to f seems to be changed to a very large integer. The second is that for some real values of a and x, I get imaginary results from this obviously real-valued function. Why are these things happening?

 > restart:
 > f:= x-> exp(x^2*(a-x)):
 > trace(f):
 > Iterate:= proc(a, x0:= 1., n:= 2000) local A:= hfarray(1..n, [x0]), f:= subs(:-a= a, eval(:-f));                #evalhf(           proc(f, A, n)           local k;                for k from 2 to n do A[k]:= f(A[k-1]) end do           end proc           (f, A, n);      #);      evalf[4]~(convert(A[1000..], set)) end proc:
 > Iterate(1.05);
 {--> enter f, args = 4607182418800017408
 <-- exit f (now in unknown) = 4607413323290551347} {--> enter f, args = 4607413323290551347
 <-- exit f (now in unknown) = 4607169774561176020} {--> enter f, args = 4607169774561176020
 > Iterate(.75);
 {--> enter f, args = 4607182418800017408
 <-- exit f (now in unknown) = HFloat(0.7545897527558614)+HFloat(0.19267839720238844)*I} Error, (in unknown) unable to store 'HFloat(0.7545897527558614)+HFloat(0.19267839720238844)*I' when datatype=float[8]
 >

## Trace in Physics package at Maple14...

I try to repeat lines (25)-(28) at

http://www.maplesoft.com/support/help/maple/view.aspx?path=Physics%2fTrace#commentform

I use Maple 14. However, instead of (28) I get the following result:

It means that Maple 14 does not perceive p_\mu, k_\nu and m as scalar quantities. I would like to ask how to define these variables correctly.

Thank you in advance!