how to get the value a number at a specify decimal position ?

hi, If I have

pi=3.1415926535897932384626433832795028

I want to get the value of lets say 10th number after the comma.

n = 5;

it this possible? I though I could convert the number to a vector

and then proced with index but i dont know how to get a vector out the given decimal number. thanks

[Image Analyst]

Sounds like homework. Is it? If so, add a homework tag below.

Answer 1

[James Tursa]

Use sprintf, find the decimal point, then get the desired digit after the decimal point. That being said, realize that for some numbers there may be rounding involved in the string output so if you push this technique to the limit it can become a much more difficult problem.

[Image Analyst]

place = 10 % Decimal place you want to extract.
myNumber = pi % Whatever your number is.
% Convert fractional part to string.
str = num2str(rem(myNumber, fix(myNumber)))
% Extract the digit.
n = str(place+2) - '0'

but this doesn't work if the place is too big, like 10 or 100 or something.

[Paul Nanfah]

thx a lot !