Programming with Python by T R Padmanabhan

Author:T R Padmanabhan
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

b.Identify the probability range of (P1Q1) for the first character.

c.Let the probability range for (Pi−1Qi−1) be D is ~ D ie where ‘s’ and ‘e’ signify the Start and End of the range.

d.The jth character in the table has the absolute cumulative probability range (C j−1, C j).

e.For all i from 2 onwards up to the last character (nth) in the source sequence, do the following recursively:

f.Let Si be the ith character in the sequence. We have the recursive relations for D is and D ie as D is = D i−1,s + (D i−1,e− D i−1,s) C si−1 and D ie = D i−1,s + (D i−1,e− D i−1,s) C si. Update the probability range for the character sequence up to and inclusive of Si using these.

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