Insufficient input parameters.

Question

준영 2023-5-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1960644-insufficient-input-parameters

回答： Neeraj 2023-5-15

function [Xm, faxis, xtw] = CalcFourierSpectrum (xt ,tmax, fmax, UseWindow )
%−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
dt = tmax/(length(xt)-1);%----<<< Insufficient input parameters. message here
t = 0: dt : tmax ;
%−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
xtw = xt ;
if ( UseWindow )
% window
fw = 1/ (2*tmax ) ;
% Hamming window
fw = 1 / ( tmax ) ;
w = 0.54-0.46*cos (2*pi*t / tmax ) ;
xtw = xt.*w;
end
% continuousf requency range
OmegaMax = 2*pi*fmax ;
dOmega = OmegaMax* 0.001 ;
%−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
fvec = [ ];
Xmvals = [ ];
p = 1;
for Omega = 0 : dOmega : OmegaMax
coswave = cos(Omega*t);
sinwave = -sin(Omega*t);
% perform the Four ier Transform v i a numerical i n t e g r a t i o n
Xreal = sum( xtw .*coswave*dt ) ;
Ximag = sum( xtw .*sinwave*dt ) ;
mag = sqrt (Xreal*Xreal + Ximag*Ximag ) ;
% s c a l e f requency to Hz , magnitude to maximum time
fHz = Omega/(2*pi);
mag = 2*mag/tmax ;
% save f requency and magnitude
faxis(p) = fHz ;
Xm(p) = mag ;
p = p + 1;
end
end

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Walter Roberson 2023-5-10

You should have other code that creates or calculates input values or requests information from the user about what data to use. And then that code should call CalcFourierSpectrum .

You should consider taking the MATLAB Onramp free course. https://matlabacademy.mathworks.com/details/matlab-onramp/gettingstarted

준영 2023-5-10

thank you.

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Answer 1

Neeraj 2023-5-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1960644-insufficient-input-parameters#answer_1235059

Hello,

As per my understanding, you are trying to call the function ‘CalcFourierSpectrum’. To do so you have to pass 4 input parameters: ‘xt ,tmax, fmax, UseWindow’. You will have to create these input parameters and store them in variables before calling the function ‘CalcFourierSpectrum’ with the respective variables as arguments.

Refer to the below documentation link for more details regarding function declaration:

https://in.mathworks.com/help/releases/R2022b/matlab/ref/function.html?searchHighlight=function%20declaration&s_tid=doc_srchtitle

https://in.mathworks.com/help/releases/R2022b/matlab/learn_matlab/calling-functions.html?searchHighlight=function%20calling&s_tid=doc_srchtitle

If you are new to MATLAB I would highly recommend to take the MATLAB Onramp course:

https://matlabacademy.mathworks.com/details/matlab-onramp/gettingstarted