Syntax help: Linearly spaced vector and simple algebra

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zizo
zizo le 13 Juin 2011
How i write this in MATLAB
t=1790 to 2000
p(t)=197,273,000/(1+e-0.0313(t-1913.25)

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Laura Proctor
Laura Proctor le 13 Juin 2011
t = 1790:2000;
p = 197273000./(1+exp(1)-.0313*(t-1913.25));
  1 commentaire
Walter Roberson
Walter Roberson le 13 Juin 2011
That does not do what zizo asked: it will not create p(1790) to p(2000)

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Walter Roberson
Walter Roberson le 13 Juin 2011
Hints:
  1. e is coded as exp(1) if you are talking about the base of the natural logarithms.
  2. you need a multiplication symbol before your final '('
  3. you need to have the same number of ')' as you have '('
  4. commas are not permitted as thousand groupings in numbers
  5. http://www.mathworks.com/help/techdoc/ref/for.html
  6. are you really using e as a single constant, or does your original formula have e raised to some power? If it does have e raised to a power, see http://www.mathworks.com/help/techdoc/ref/exp.html

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