PARI's commands

[science_man_88]

Originally Posted by CRGreathouse

With

M=[1,2;3,4]

you can use

M[2,1]

to show the element in the second row, first column.

that isn't quite what I wanted I figure it out though now I can make a multiplication table lol.

[science_man_88]

maybe not lol I can't get one thing to work lol if I could I can generate a multiplication table.

[CRGreathouse]

Originally Posted by science_man_88

that isn't quite what I wanted

That's the difficulty, isn't it -- I can only know what you write, not what you want.

Originally Posted by science_man_88

maybe not lol I can't get one thing to work lol if I could I can generate a multiplication table.

for(x=1,9,for(y=1,9,print1(x*y" "));print())

does a rough job. You'll have to work a bit more to get the columns to line up.

[science_man_88]

well I was going to try to use matrices to do it but:

multiplication(i,j)= x=Mat([]);for(i=1,i,for(j=1,j,x(i,j)=i*j));return(x(i,j))

was the best I could do I think

[CRGreathouse]

Use [] for accessing the elements of vectors and matrices, not ().

I'm not sure why you're using one here, though. You fill in a multiplication table, pull out one element, throw the table away, then return the one element.

[3.14159]

Well, I'm finishing up on b = 501-750.

I have 10 values left.

[science_man_88]

Originally Posted by CRGreathouse

Use [] for accessing the elements of vectors and matrices, not ().

I'm not sure why you're using one here, though. You fill in a multiplication table, pull out one element, throw the table away, then return the one element.

1) I couldn't get [] to work for matrices
2) I wanted the whole table but I couldn't get it all to print

[science_man_88]

I gave up on matrices.

multiplication(i,j=i)= for(i=1,i,for(j=1,j,print1(i*j"\t"));print(""))

[CRGreathouse]

Originally Posted by science_man_88

1) I couldn't get [] to work for matrices

You'll need to define the matrix first. You tried -- but you only made it a 0x0 matrix, you need an i x j. try matrix(i,j,unused1, unused2, 0) or even matrix(i,j,x,y,x*y) which avoids the need for the loops.

Originally Posted by science_man_88

2) I wanted the whole table but I couldn't get it all to print

Just return the matrix.

foo(i,j)=matrix(i,j,x,y,x*y)

[CRGreathouse]

Originally Posted by science_man_88

I gave up on matrices.

multiplication(i,j=i)= for(i=1,i,for(j=1,j,print1(i*j"\t"));print(""))

That looks fine, except that your variables are bumping into each other: you have the "max j" and the "loop j" and likewise for i. If you rename them this should work nicely.

[science_man_88]

Originally Posted by CRGreathouse

You'll need to define the matrix first. You tried -- but you only made it a 0x0 matrix, you need an i x j. try matrix(i,j,unused1, unused2, 0) or even matrix(i,j,x,y,x*y) which avoids the need for the loops.



Just return the matrix.

foo(i,j)=matrix(i,j,x,y,x*y)

I tried your idea:

***   too many arguments: ...plication(i,j=i)=x=Mat(i,j,x,y,x*y);for(i=1,i
                                                      ^--------------------