Help Calling a Function

The following is my .m file. I have the reaeration function working fine. It is just the deOxygen function that will not work. I get the following error when trying to run the program: "Warning: File: myHW7.m Line: 21 Column: 24 Function with duplicate name "deOxygen" cannot be called."

Any suggestions? Thanks in advance Alex

function constant = reaeration(array)
function resultarray = deOxygen(array , constant)

load PollutionData.txt;
array = PollutionData(:,1);
timearray = (0:.5:250);
constant = reaeration(array)
resultarray = deOxygen(array , constant)

return

function constant = reaeration(array)

constant = ((array(5,:) .* array(3,:)) .^ 0.5) ./ (array(4,:) .^ 1.5);

return

function resultarray = deOxygen(array , constant)

array(3,:) = array(3,:) .* 0.001076; %conversion
array(6,:) = array(6,:) .* 0.0002778; %conversion

for i = 250: 0.5: 0, do, end

resultarray = (((array(6,:) .* array(2,:)) ./ (constant - array(6,:)) .* (exp(-array(6,:) * i * 3600) - exp(-constant .* i .* 3600)) + (array(1,:) * exp(-constant .* i .* 3600))));

return

Answer 1

[Image Analyst]

You can't start out myHW7.m with these lines:

function constant = reaeration(array)
function resultarray = deOxygen(array , constant)

Those are function definitions which you define later in the m-file. So you're basically doing it twice and the first time you define them there's not even any body to the function. So, I assume you just want to call them, but to call them you need a function line with myHW7 in it:

function myHW7()
    load PollutionData.txt;
    array = PollutionData(:,1);
    timearray = (0:.5:250);
    % Now call (not define) the functions
    constant = reaeration(array)
    resultarray = deOxygen(array , constant)

      return

% Now define other functions like reaeration() and deOxygen()