# How do you do log in Matlab?

Category:
science
physics

Y =

**log**( X ) returns the natural logarithm ln(x) of each element in array X . If you want negative and complex numbers to return error messages rather than return complex results, use reallog instead.

Furthermore, how do you write log in Matlab?

- log b (X)= log a (X)/log a (B) you can check this easily.
- ln(x) = log 10 (x)/log 10 (e) so, just write that code in matlab.
- my_ln= log 10 ( number ) / log 10 ( exp(1) ); you can also make it as a function and call it whenever you need it,
- function [val] = ln_fun(number)
- end.

**log10**(x) is not the

**same as ln**(x), although both of these are special logarithms that show up more often in the study of mathematics than any

Just so, how do you take the log of a matrix in Matlab?

L = logm( A ) is the principal **matrix logarithm** of A , the inverse of expm(A) . The output, L , is the unique **logarithm** for which every eigenvalue has imaginary part lying strictly between –π and π. If A is singular or has any eigenvalues on the negative real axis, then the principal **logarithm** is undefined.

A logarithm is the power to which a **number** must be raised in order to get some other **number** (see Section 3 of this Math Review for more about exponents). For example, the base ten logarithm of 100 is 2, because ten raised to the power of two is 100: **log** 100 = 2. because.