help matlab 2011b ( First input argument must be a function handle. )

fun = is * (exp((q * vd_f)/(k * tk)) - 1)

quadgk(fun,0,inf)

i need help as soon as well

saturation current equation by the way

[Adam]

https://uk.mathworks.com/help/matlab/matlab_prog/creating-a-function-handle.html

What is your question? That you don't know what a function handle is? Or that you don't understand the error? The error tells you exactly what you need - a function handle. You created just a variable that is the result of an expression evaluated on the spot, assuming all those inputs are defined.

Answer 1

[Walter Roberson]

Your code should look something like,

fun = @(q) is * (exp((q * vd_f)/(k * tk)) - 1)

Here, the part inside the () after the @ should be the variable that you are integrating over.