Syntax help: Linearly spaced vector and simple algebra

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

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Weitere Antworten (1)

Walter Roberson
Walter Roberson am 13 Jun. 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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