'problemset4pt1' requires more input arguments to run

Not sure how to fix. Here is the code:

function f_x = problemset4pt1(porosity)

% Constants

deltaP = 810.5; %dyn/cm^2

l = 20; %cm

mu = 0.01; %Poise

rho = 1; %gm/cm^3

dp = 0.1; %cm

u = 0.75; %cm/s

%Evaluating function

f_x = 150*mu*u/(dp^2)*((1-porosity)^2)/(porosity^3) + 1.75*rho*(u^2)/dp*(1-porosity)/(porosity^3) - deltaP/l;

end

Answer 1

[Les Beckham]

How are you calling the function? You can't just press the green Run triangle in the editor for a function that requires input arguments. Go to the command window and call the function with an appropriate value for the porosity input argument.

It seems to work fine here (at least it runs and returns a result).

result = problemset4pt1(0.1)

result = 9.9944e+04

function f_x = problemset4pt1(porosity)
% Constants
deltaP = 810.5; %dyn/cm^2
l = 20; %cm
mu = 0.01; %Poise
rho = 1; %gm/cm^3
dp = 0.1; %cm
u = 0.75; %cm/s
%Evaluating function
f_x = 150*mu*u/(dp^2)*((1-porosity)^2)/(porosity^3) + 1.75*rho*(u^2)/dp*(1-porosity)/(porosity^3) - deltaP/l;
end