Similarly in MATLAB if you type Y=log(2), then it will give the value as 0.6931 only. So ln(2) in calculator and log(2) in MATLAB both will give you the same answer. but remember ln is just an e-log. Suppose we need to compute ln(x) in matlab, then simply write log(x) in the matlab.

Y = log2( X ) returns the logarithm to the base 2 of X such that 2Y = X. If X is an array, then log2 acts element-wise on X . [ F , E ] = log2( X ) returns arrays of mantissas and exponents, F and E , such that X = F ⋅ 2 E . The values returned in F are in the range 0.5 <= abs(F) < 1 .

Y = log10( X ) returns the common logarithm of each element in array X . The function accepts both real and complex inputs. For real values of X in the interval (0, Inf ), log10 returns real values in the interval ( -Inf , Inf ). For complex and negative real values of X , the log10 function returns complex values.

binary logarithm
The binary logarithm is the logarithm to the base 2 and is the inverse function of the power of two function. As well as log2, the alternative notation for a binary logarithm lb (the notation preferred by ISO 31-11 and ISO 80000-2).

. Therefore, log2(2) = 1. Question 3) What is the value of log 2 base 10?

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.

Log2 aids in calculating fold change, by which measure the up-regulated vs down-regulated genes between samples. Usually, Log2 measured data more close to the biologically-detectable changes.

Here it is always easier to find the value of log(2) to the base 10 and use it to find the value of the logarithm of 2 to any other bases. Using properties we can find the answer through calculations, close to the actual value. 10 *log(2) = log(1024). Since the base is also 10, we get log(2) = 3*0.1.