I am trying to get started with fzero in matlab. Is there any tutorial to be found somewhere

fzero tutorial needed

Answer 1

[Walter Roberson]

Unless you need specialized options, the basic form is one of

output_variable = fzero(@FUNCTION_NAME, STARTING_GUESS)

output_variable = fzero(@FUNCTION_NAME, [LOWER_BOUND UPPER_BOUND])

or pass in an anonymous function instead of @FUNCTION_NAME

The function indicated must expect exactly one scalar parameter, and must return a scalar real value (not complex)

Example:

format long g
fun = @(x) x.^4 - x.^2 - cos(x)

fun = function_handle with value:
    @(x)x.^4-x.^2-cos(x)

xsol = fzero(fun, 2.8)

xsol = 
          1.14614057168858

fun(xsol)

ans = 
     -5.55111512312578e-16

Sometimes it is necessary to pass additional options, espcially if you want the output to be plotted as you go.