formula for changing the base of a logarithm is: loga(N) = (logb(N))/(logb(a)) (a) Use MATLAB's function log (x) to calculate log4(0.085)

Can you guide me about log4(0.85) 4 is writen below the log

Answer 1

[Karim]

You can create a function handle to eval the desired base:

log4_fun = @(x) log(x) / log(4)

log4_fun = function_handle with value:
    @(x)log(x)/log(4)

log4_fun(0.85)

ans = -0.1172