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how do change a string of letters into integers using sagecell?

asked 2016-11-13 18:22:55 +0200

I am a high school teacher and I want to change letters into integers. Then, I am taking the numbers into a matrix mXn dimension. I want to show how to multiply matrices to encode a message. Then, decode the message by multiplying by the inverse of a matrix. I know some if any basics using sagemathcell or python.

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answered 2016-11-13 19:09:15 +0200

ndomes gravatar image

An example:

S = 'my message'
print S
L = list(S) 
print L
L_int = [ord(s) for s in L]
print L_int
print [chr(i) for i in L_int]
print ''.join([chr(i) for i in L_int])

M = matrix(2,5,L_int)
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Asked: 2016-11-13 18:22:55 +0200

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Last updated: Nov 13 '16