How to plot the (x,y,z) points on 3d plot like first point is (19.8,12,1.62) like that in order

and connect all the ponts above as a line

Kind help your help will be acknowleged

Find the sum of the degrees of the Neighbors of a vertex say u in a graph G. Kind help with writing a function.

fd := fopen("temp_file.txt", WRITE);
Error, (in fopen) permission denied

It is giving this error even to my download folder as I am able download files via internet can someone help with a small program to creating file and writing to it in maple.

Kind help it will be acknowleged

Kind help Given graph G and an edge say (u,v) 

how to get the number of vertices of G which are shorter distance v than from the vertex u

Similiarly the number of vertices of G which are shorter distance u than from the vertex v

Kind help if anyone possible. I apologize to distrurb I would 200% acknowedge and merit your efforts.  

Suppose I have a matrix say

A:=[[1,2,3],[3,4,5],[5,6,7]]

If I want to get the sum of all the elements of the matrix.

Kind help if any one.

I apologize for the disturbance