How to plot lnx ?

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Mohamad
Mohamad 2013-9-29
评论： Azzi Abdelmalek 2013-9-29
let us say
x= [0 1 2 3 4 5 6 7 8 9]
and y = ln(x)
plot (x,y ) does not work. Is y=ln(x) a wrong statement ?
  2 个评论
Titus Edelhofer
Titus Edelhofer 2013-9-29
Since I guess, y = ln(x) has thrown an error like "Undefined function or variable y" I would say, yes, this is a wrong statement. My suggestion: open the doc and search for logarithm ...
Mohamad
Mohamad 2013-9-29
I did it is not understandable

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Azzi Abdelmalek
Azzi Abdelmalek 2013-9-29
编辑：Azzi Abdelmalek 2013-9-29
x= [0 1 2 3 4 5 6 7 8 9]
y=log(x)
plot(x,y)
You should know that log is not defined for x=0
  2 个评论
Mohamad
Mohamad 2013-9-29
this is log, I want lnx, which acutally is logx of base e.
Azzi Abdelmalek
Azzi Abdelmalek 2013-9-29
编辑：Azzi Abdelmalek 2013-9-29
log is just the name of the function corresponding to ln(x). You can check
log(exp(1))
help log

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