## 769 Reputation

13 years, 342 days

## How to remove zeros from output?...

Maple 17

Hello

If 0 occurs in the first element, I want to remove the list containing zero and the associated number.

example

p := [[[0, 5], [3, 10], [1, 20], [0, 50]], [[2, 5], [0, 10], [2, 20], [0, 50]]]

after processing:

[[[3, 10], [1, 20]], [[2, 5], [2, 20]]]

I tried in vain...

select(i -> (subs(p,p[1,i,1])>0), [\$1..nops(p)]);

## Update standings...

Maple 2017

update_standings_ELO_draw.mw

This latest question involves ELO, which is used to rate chess players (and other sports).

The difference between the previous (win-loss) system and ELO is the allowance for a third option, a draw. Carl coded the previous rating system, and I have tried to alter it.

See code for ELO procedure.

Adding a D to the third field, gets the result I want.

ELO(Record(rating= 2400),Record(rating= 2000),D)

Adding anything other than D to the third field means the first player defeats the second.

My preference would be to leave nothing in this third field to signify this (but I don't know if this is possible).

The main problem is getting the bulk processing to work (for a series of matches...)

See Update procedure.

I have this flawed notation:

Games:= [[Tom_C, David_J, D],[David_J, Tom_C]]: #Tom_C drew David_J then David_J defeats Tom_C.

Hope someone can help.

## Import Excel file...

Maple 2017

Hi. I have an excel data file.

IDEALLY, I want to import the results of the formula in cells C3:C7.

But it doesn't like it. Reports 0's

When I convert the range to result to values in cells D3:D7 it imports no problem. But I don't want to do this step.

any ideas?

Book1.xls

import.mw

## Compiler setup in Maple...

Maple 2017

Hello

Equal_products_16.mw

I think this code was written (Joe Riel/C.Love) on Maple 16 platform back in 2013, but I want it to work in my currrent version.

I think I had to set up a compiler, which was a bit of an ordeal.

compiler setup?

I have installed MS Visual Studio.

Now in Maple I try:

>Compiler:-Setup()

i put vcvars64.bat and vcvarsx86_amd64.bat (from Microsoft Visual Studio folder) in my C:\Program Files\Maple 2017\bin.X86_64_WINDOWS and locate them

I get error

Error, (in Compiler:-Setup) unable to write to initialization file, C:\Program Files\Maple 2017\bin.X86_64_WINDOWS/launch.ini, possibly due to insufficient permissions

@

## Split a list into nearly equal sublists...

Maple 2017

Hello

What is the fairest way to divide a shelf of books up between n people?

Partition_problem2.mw

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