What Dth stands for?

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Barbara Fiorani
Barbara Fiorani on 2 Oct 2020
Commented: Walter Roberson on 2 Oct 2020
  3 Comments
madhan ravi
madhan ravi on 2 Oct 2020
What did you try for your homework?

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Accepted Answer

Walter Roberson
Walter Roberson on 2 Oct 2020
It means that you have a variable named D and that you want the value of D to indicate which row number of H to access. If D had value 7 then you would want the "seventh" row. If it had value 8 then you would want the "eighth" row. If it had value 19, you would want the "nineteenth".
Explicit values such as 7 are "Cardinal" numbers -- numbers that tell you how much of something there is.
Designations such as "first" ("1st"), "second" ("2nd"), "third" ("3rd") are known as "Ordinal" numbers, and talk about the position of something. https://www.mathsisfun.com/numbers/cardinal-ordinal-nominal.html
So when refering to wanting to use the value stored in D as a position to look at, English would often use Ordinals -- most of which end in "th" in English. To refer to D as designating an Ordinal (position) English might then refer to the row . might also be written as or as . It means much the same thing as using the content of D as counting the number of rows that need to be dealt with (with the implication that the first (D-1) are not being paid attention to.)
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Walter Roberson
Walter Roberson on 2 Oct 2020
I would need to see your code.

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More Answers (1)

madhan ravi
madhan ravi on 2 Oct 2020
Dth stands for the row 2 , index it to the matrix and use sum().
  5 Comments
Walter Roberson
Walter Roberson on 2 Oct 2020
You should not be using rand() for this purpose. You should be using randi() .

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