Error Message: "Error: Function definitions are not permitted in this context." How do I fix this?

Hello, This is the function I have created function [R] = HydraulicRadius(W)

% ........

for D = 0.5:0.01:1.1

R=(W*D)/(W+2*D);

end

end

This is my input in the command window.

>> W=112.78; 

>> function [R] = HydraulicRadius(W)

This is the output I get

??? function [R] = HydraulicRadius(W) 

      |

Error: Function definitions are not permitted in this context.

I'm not really sure why I am getting this error message. Any help would be greatly appreciated!

Answer 1

[Sarah Wait Zaranek]

When you define a function in a file - you use the

function [R] = HydraulicRadius(W)

when you call it to use it, you do not use the word function as that is used for definition (aka your error message).

Call it like this:

R = HydraulicRadius(W)

(Note, you probably don't need the [], in the function definition)

[Jason]

That was silly of me!

Cheers for that :)

Answer 2

[Necs]

Can some1 please help me. I have been trying to run this codes but getting a :: Function Definition not permitted.

HERE IS THE CODE.

>> %**************************************************************

% Filename : analysisFB.m

% Author : Necs

% Date : Aug 2014

% Purpose : Reconstruct the image using 2D forward discrete wavelet transform %**************************************************************

function wc = analysisFB(data,lpfilter,hpfilter)

[n_row,n_col] = size(data);

n = n_row;

le = length(lpfilter);

%###################### operation on the rows ##############################

pad_data = [data data(:,1:le)];

lpcoeff = downsampleConv(pad_data,lpfilter,le,n);

hpcoeff = downsampleConv(pad_data,hpfilter,le,n);

%transpose the matrix

data = [lpcoeff hpcoeff]';

%###################### operation on thecolumns###########################

pad_data = [data data(:,1:le)];

lpcoeff = downsampleConv(pad_data,lpfilter,le,n);

hpcoeff = downsampleConv(pad_data,hpfilter,le,n);

%transpose the matrix again

wc = [lpcoeff,hpcoeff]';

return;

%local function

function downsample_coeff = downsampleConv(coeff,filter,le,n)

downsample_coeff = conv2(coeff,filter);

downsample_coeff = downsample_coeff(:, le:2:(le+n -1));

return;

??? Undefined function or variable 'data'.

??? Error: File: necs.m Line: 25 Column: 1

Function definitions are not permitted in this context.

>> I also tried removing the function as illustrated in the example above but still giving an error