Is the log() function faulty?

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CAS
CAS le 3 Mai 2016
Réponse apportée : CAS le 3 Mai 2016
When I use the log function [log (x)] to log the value 616, I am getting the answer 6.4232. However, when I calculate it on windows excel or my calculator I get 2.789580712.
I'd like to know why I am getting a different answer on Matlab.

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Réponse acceptée

Stephen23
Stephen23 le 3 Mai 2016
Modifié(e) : Stephen23 le 3 Mai 2016
The documentation tells us that in MATLAB log calculates the natural logarithm, and log10 the base ten logarithm.
>> log(616)
ans = 6.4232
>> log10(616)
ans = 2.7896
The MATLAB help is great: it tells us how MATLAB works. You should try using it.
  1 commentaire
John D'Errico
John D'Errico le 3 Mai 2016
Oh, wait. You mean the help is there for us to read? Just think - all this time I've wasted, wondering what stuff does.

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CAS
CAS le 3 Mai 2016
Thank you very much for your help!!!:)

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