why do i get this error as no enough input arguments

Question

sanket neharkar 2022-11-16

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1852418-why-do-i-get-this-error-as-no-enough-input-arguments

回答： Image Analyst 2022-11-17

function [J,distinct_d]=jd(X,p)

% Computes the distances between all pairs of points in a sampling

% plan X using the p–norm, sorts them in ascending order and

% removes multiple occurrences.

%

% Inputs:

% X – sampling plan being evaluated

% p – distance norm (p=1 rectangular – default, p=2 Euclidean)

%

% Outputs:

% J – multiplicity array (that is, the number of pairs

% separated by each distance value).

% distinct_d – list of distinct distance values

if ~exist('p','var')

p=1;

end

% Number of points in the sampling plan

n=size(X,1);

% Compute the distances between all pairs of points

d=zeros(1,n*(n-1)/2);

for i=1:n-1

for j=i+1:n

% Distance metric: p–norm

d((i-1)*n-(i-1)*i/2+j-i)=norm(X(i,:)-X(j,:),p);

end

% Remove multiple occurrences

distinct_d=unique(d);

% Pre-allocate memory for J

J =zeros(size(distinct_d));

% Generate multiplicity array

for i=1:length(distinct_d)

% J(i) will contain the number of pairs separated

% by the distance distinct_d(i)

J(i)=sum(ismember(d,distinct_d(i)));

end

after this wheni am running this code i am gettimg a error as no enough arguments

this code i have taken from a book

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Answer 1

Image Analyst 2022-11-17

1
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https://ww2.mathworks.cn/matlabcentral/answers/1852418-why-do-i-get-this-error-as-no-enough-input-arguments#answer_1102068

You can't just push the green run triangle because it won't know what you want for the input arguments. You have to either

call the function with a script or function in another m-file, or
call it in a script defined before the function in the same m-file. In this case the function will have to have "end" as the last line.

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Answer 2

Askic V 2022-11-16

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编辑：Askic V 2022-11-16

在 MATLAB Online 中打开

You're probably executing this code as a Matlab script. You need to make a function call.

This code should be saved in a separate file called jd.m.

and in Matlab command windows make a coll of this function, like:

[j_out,d_out] = jd(X,1)

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Answer 3

Kevin Holly 2022-11-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1852418-why-do-i-get-this-error-as-no-enough-input-arguments#answer_1101318

在 MATLAB Online 中打开

I just ran the code without getting an error.

x = 10*rand(4,2)
x = 4×2
    9.1847    5.8076
    4.9108    6.3358
    3.5890    2.8121
    4.7894    9.1143
[J,distinct_d] = jd(x,1)
J = 1×6
     1     1     1     1     1     1
distinct_d = 1×6
    2.8999    4.8020    4.8455    7.5026    7.7020    8.5911
function [J,distinct_d]=jd(X,p)
% Computes the distances between all pairs of points in a sampling
% plan X using the p–norm, sorts them in ascending order and
% removes multiple occurrences.
%
% Inputs:
% X – sampling plan being evaluated
% p – distance norm (p=1 rectangular – default, p=2 Euclidean)
%
% Outputs:
% J – multiplicity array (that is, the number of pairs
% separated by each distance value).
% distinct_d – list of distinct distance values
if ~exist('p','var')
p=1;
end
% Number of points in the sampling plan
n=size(X,1);
% Compute the distances between all pairs of points
d=zeros(1,n*(n-1)/2);
for i=1:n-1
    for j=i+1:n
    % Distance metric: p–norm
    d((i-1)*n-(i-1)*i/2+j-i)=norm(X(i,:)-X(j,:),p);
    end
end
% Remove multiple occurrences
distinct_d=unique(d);
% Pre-allocate memory for J
J =zeros(size(distinct_d));
% Generate multiplicity array
for i=1:length(distinct_d)
% J(i) will contain the number of pairs separated
% by the distance distinct_d(i)
J(i)=sum(ismember(d,distinct_d(i)));
end
end