## 1042 Reputation

12 years, 36 days

## Can I insert a Hyperlink to a Geogebra d...

Maple 2022

I would like to insert a hyperling to a geogebra document but the hyperlink box deosn't appear to allow general files. Can this be done?

## Problem with long description in a proce...

Maple 2022

I have a long description that contains some Maple commands.
I dont want to use # as the lines dont show up when i use

```Isee:=proc(a)
interface(verboseproc = 3);
printf("%P", eval(a));
end proc
```

The long description is. Any way around the problem?

```Test:=proc(A,B,C)  description  "Computes projective line through 2 projective points or intersert of 2 projective lines as a projective point or coincidence of piont  line
Does some checking on validity of inputs.
Mobposn:- Global Variable, must = 1 or 3.
Points are returned as <1,x,y> or <x,y,1>
Lines are returned as <z,x,y> or <x,y,z>,
normalgpt :- Global Variable must be 0 or 1.
Points with algecraic elements are not reduced to <1,x,y> or <x,y,1> if 0
Points are defined as row vectors and  lines as column `vectors"`;

print(A,B,A-C);

end proc;```

## How can an row Vector be extended?...

Maple 2022

I need to conver 2D points to projective points. Originally I used lists but now need to handle vectors too. To add to that that the projective coordinate for points is now being stated as [1,x,y] instead of [x,y,1]. That is was easy enough to handle for lists.

I have a lot of old worksheets that use the list form [x,y,1] that I want to maintain compatibility with. I only have one procedure I need to convert.

```Mobposn := 1;
testP := [2, 7];
if Mobposn = 1 then
[1, op(testP)];
else
[op(testP), 1];
end if;```

I need to do the same for vector definition of the points. The points are defined as row Vectors

`A:=<2,7>^%T`

to get

```Ap:=<1,2,7>^%T

or

Ap:=<2,7,1>^%T```

I know coud just do (as these are short vectors)

```Ap:=<1,A_1,A_2>^%T

or
Ap:=<A_1,A_2,1>^%T```

Is there a more general way?

## How can an equation be sorted by numeric...

Maple 2022

I want to collect up the equation terms by the numerical value of the terms coefficient? Have tried sort collect combine...
So far the best I have come up with is nops(indets(on each term). And put them in seperate lists. This still doesn't quiet do the trick.
I am looking to achieve. Would to happy to have then as seperate lists or equations.

`(a_1^5+a_2^5...)+5(a_1^4a_2+a_1^4a_3....)+10(a_1^3a_2^2 ....)+20(  ....   )+......+60(a_1^2a_2a_3a_4+ a_1a_2^2a_3a_4....)`

## How to make Exported equations readable ...

Maple 2022

I have a set of formulas I saved in a matrix and the exported the matrix to Excel. However when I open the file in Excel the equations are in prefix notation (I think).  That's not exactly human readable friendly.  If I copy and paste straight into excel they are readable.

It there a way to make the Maple export similar?

EDIT:-  I exported as a.csv file because if export as .xlsx    all the equation change into "#NUM!" in the spreadsheed.

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