Matrices

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Matrices

Mr Dino 07 Dec 2011 23:40

What's the best way to create a 5 by 5 matrix with all 1s?
I'd prefer into Ans, and not some matrix var. I could use a For( loop, but that seems too long.
And I've used:

:{1,1,1,1,1
:List►matr(Ans,Ans,Ans,Ans,Ans,[B]

But that uses a matrix var.
Should I try augment?

Re: Matrices

builderboy 08 Dec 2011 00:21

Hmm this is indeed tricky, and I can't seem to come up with an elegant solution apart from just typing it in directly:

[[1,1,1,1,1],
 [1,1,1,1,1],
 [1,1,1,1,1],
 [1,1,1,1,1],
 [1,1,1,1,1]]

If you absolutely need to not use any Matrix Var's and don't wan't to go the long way, you might be able to use the Identity(#) function to generate a matrix and then use several other functions to modify it (unfortunately Fill() needs a matrix variable and not just a matrix). If you were able to use a matrix variable, you could always do

Identity(5->[J]:Fill(1,[J]

Re: Matrices

Weregoose 08 Dec 2011 02:37

You were close.

:"[1,1,1,1,1]
:expr("["+Ans+Ans+Ans+Ans+Ans

As for a list of five ones, you could do binomcdf(4,0.