how to represent ln in matlab?

Dear Sir,

I need to calculate 'log base e(ln)' in matlab.how to use it ?.

Thanks in advance.

Answer 1

[the cyclist]

The log() function is base-e log. So, to take log of x [mathematicians would usually say ln(x)], just do

>> log(x)

[Maryknoll Dsouza]

Does not work

[Steven Lord]

Say more. Does it error (and if so what is the FULL text of the error message)? Does it issue a warning (ditto on the FULL message)? Does it give you a different answer than you expect?

Are you sure you haven't written your own log.m that's shadowing the log function built into MATLAB?

which -all log

Answer 2

[omar alshowi]

MATLAB statement to evaluate the expression (ln exp(2 + cosπ)): is

[Walter Roberson]

That sounds like a homework question.

Hints:

https://www.mathworks.com/help/matlab/ref/exp.html

https://www.mathworks.com/help/matlab/ref/double.cospi.html

https://www.mathworks.com/help/matlab/ref/log.html

Answer 3

[Lakshya Bhatra]

ln^2(2)

[Walter Roberson]

log(2).^2

ans = 0.4805