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

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Pedro Leiva Quero
评论： Honglei Chen 2019-8-9
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!!
  1 个评论
Torsten
Torsten 2019-8-1
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

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回答（3 个）

Walter Roberson
Walter Roberson 2019-8-1
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.
Torsten
Torsten 2019-8-1
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.
Honglei Chen
Honglei Chen 2019-8-1
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
  2 个评论
Pedro Leiva Quero
Pedro Leiva Quero 2019-8-9
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
Honglei Chen 2019-8-9
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

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