Pascal triangle to a matrix

11222019, 08:45 AM
Post: #1




Pascal triangle to a matrix
Hello
I need some help. I do not program often and when I do I have doubts. I try to put the values of the Pascal triangle, 1  m1(1,1) 1 1  m1(2,1) m1(2,2) 1 2 1  m1(3,1), etc 1 3 3 1 …………….. to a matrix that I call "m1" up to "f" lines, in the following way: EXPORT Tri_Pa(f) BEGIN LOCAL n,m; LOCAL m1; FOR n FROM 0 TO f DO FOR m FROM 0 TO n DO m1(n,m):=COMB(n,m); END; END; END; But the program stops in the line "m1(n,m):=…", and says: "Invalid input". How should I define the matrix to avoid the error? Thanks in advance for your help Toni 

11222019, 01:07 PM
(This post was last modified: 11222019 01:28 PM by toml_12953.)
Post: #2




RE: Pascal triangle to a matrix
(11222019 08:45 AM)Tonig00 Wrote: Hello What does COMB(0,0) even mean? I don't see it as being useful. Try this: Code: EXPORT Tri_Pa(f) Tom L I think therefore I amDescartes I think therefore you areGorgias You're not here to thinkArmy Sergeant 

11222019, 03:57 PM
Post: #3




RE: Pascal triangle to a matrix
(11222019 08:45 AM)Tonig00 Wrote: But the program stops in the line "m1(n,m):=…", and says: "Invalid input". You get an error because:  You need to define m1 as a matrix  Matrix indices start at 1 and not 0 So here is a working version of your program : Code: EXPORT Tri_Pa(f) Note that you can also generate the same matrix using just the MAKEMAT function: Code: EXPORT Tri_Pa(f) 

11222019, 07:14 PM
Post: #4




RE: Pascal triangle to a matrix
Thanks very much
Both works, and very interesting how the matrix works and the IFTE function. Thanks 

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