solving an equation with matlab

[sasaberali]

define equation in matlab

hi
how can i solve the following equation using matlab?please write the commands.
logα-Γ'(α)/Γ(α)=β
in which α is the variable,β is a known(you can use a number instead) parameter and Γ represents gamma function and Γ' is it's derivative.
Thanks

 

[peleda]

do you know how to find the derivative of the gamma function?

if you do - define a function like this

y = @(a) log10(a) - (gamma derivative (a) ???? / gamma(a)) - beta

notice that beta is on the other side of the equation. hence you are solving for zero now.

plot the function using:
fplot(y, [minrange, maxrange])
this will enable you to solve it graphically.

analytically, use:
fzero(y, possible zero)

this steps assume you know how to find the derivative of the gamma function.

 

[sasaberali]

thank you for your help;
i can find the derivative of gamma function,but its better to ask my question in a different way:
I want to use solve command to find the answer,is there any way to use diff command directly,for example sth like this:
solve('log(alpha)-diff('gamma(alpha)')=0.5')
(i know this command is not correct,i need sth like this which is acceptable for matlab!!!)

 

[mfonsio]

can any matlab guru hep me compare deployment algorithms for networks?

 

[jgatta]

Do you want a symbolic solution or numerical solution?

 

[sasaberali]

a symbolic one