How can i fix this problem "Undefined function 'Taylor' for input arguments of type 'double'."

I have a big Script Trying to Simulate a Radar Pattern, the Script is from a book, and a have problems in this part of the code:

%%Compute patterns

if array_params.wgtflag==0
    array_params.amp_wgts=ones(array_params.nelem,1);
else
    array_params.amp_wgts=Taylor(array_params.nelem,array_params.taylor.SLL,array_params.taylor.nbar);
end

Error:

>> Pattern1D

Undefined function 'Taylor' for input arguments of type 'double'.

Error in Pattern1D (line 40)

array_params.amp_wgts=Taylor(array_params.nelem,array_params.taylor.SLL,array_params.taylor.nbar);

Thanks guys!!

[Torsten]

Comment by Pedro Leiva Quero

I used:

Which Taylor.m

And this is the answer:

C:\Program Files\MATLAB\R2017a\toolbox\symbolic\symbolic\@sym\taylor.m % sym method

Answer 1

[Walter Roberson]

https://www.crcpress.com/downloads/K12849/MATLAB%20Program%20and%20Function%20Listings.doc has the code listings for the functions.

Note that this is not at all the same as the symbolic taylor() function.

Answer 2

[Torsten]

MATLAB's "taylor"-function is called with a small "t" , and your argument list does not seem to be compatible with this function.

My guess is that the author of the code uses a function different from the one noted above.

Answer 3

[Honglei Chen]

Looks like you are using a function from the book so you may want to find the function from the disc or download. You should also be able to replace it with MathWorks' taylorwin function

https://www.mathworks.com/help/signal/ref/taylorwin.html

HTH

[Pedro Leiva Quero]

Hi Honglei, thanks for the answer, i have a new error code:

>> Pattern1D

Error using taylorwin>validateinputs (line 115)

The sidelobe level SLL must be a negative number.

Error in taylorwin (line 44)

[N,NBAR,SLL] = validateinputs(varargin{:});

Error in Pattern1D (line 40)

array_params.amp_wgts=taylorwin(array_params.nelem,array_params.taylor.SLL,array_params.taylor.nbar);

>>

I don't know if this error mean something to you.

Thanks for the help

[Honglei Chen]

MATLAB's taylorwin uses negative number to specify sidelobe level. You can try to use

-array_params.taylor.SLL

instead of

array_params.taylor.SLL

HTH