Teep

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12 years, 29 days

MaplePrimes Activity


These are replies submitted by Teep

@Carl Love 

Thanks again, Carl.

Very interesting ... I am not familiar with this topic, so I really appreciate the steer.

I took your advice and trawled Mapleprimes and the Web but cannot see any light at the end of this tunnel ... now I'm even more intrigued!

If anyone can lend a hand here, it would be much appreciated.

(it appears that there is a Cluster Analysis package developed by Daniel Skoog, but I cannot seem to download this).

 

@tomleslie 

Yes - the data frame approach is used only to attach the labels to the Excel spreadsheet, but as you indicate - it may be redundant.

Your advice is warmly received and the additional insights are great to get. I'll use your routine in future. Thanks for enlightening me.

@dharr 

That's a neat routine.

Thank you so much.

@Kitonum 

That did the trick!

Thanks very much.

@dharr 

Lovely solution ... than's for introducting me to DataFrame.

@Kitonum 

Thank you!

@Carl Love 

Thank you for your (usual!) speedy assistance. This is a great help.

Suppose the 4 points are labelled A,B,C and D (can we assign a name to each point?)

Then I would look for a 4x4 matrix with column labels, A, B, C and D and also row labels A, B, C and D and at each intersection, the distance would be recorded. Ideally, I would love to export the results to Excel - please see attached Excel sheet.

Mapleprimes.xlsx

 

@Carl Love 

This is very useful and insightful. I thank you!

@Thomas Richard

Thanks for this ... interesting.

@Lenin Araujo Castillo 

The Maple routine is quite useful - thanks so much.

Suppose a relation under investigation is nonlinear. Do you know how this is treated?

 

@Carl Love 

Very interesting ... this worked just fine and satisfied a little curiosity!

Thanks (again!).

@tomleslie 

This is a welcomed addition to the solution ... I'm obliged!

@tomleslie 

As usual, you have provided a good insight intyo this problem .... I thank you for that.

The classification routine is great and on the matter of a non-source/sink, I'll explore this further. The matrices, A and B, were for the sake of example only - I'll run some more representative problems to test this out.

Thanks again!

@Kitonum 

This seems to have done the job - thank you so much!

I like your routine ... with this, I can move on.

 

Thanks again.

@Kitonum 

Yes - I can relabel the vertices as you proposed. The Help link was very useful ... thanks.

However, I might be on the wrong track here. I wish to assign labels (letters) to the matrix rows and numbers to the matrix columns as mentioned in the problem statement. The sources lie in the row number; the sinks lie in the columns that have entries=1. 

 

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