Unrecognized function or variable

Question

Kutlu Yigitturk 2021-3-15

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/773952-unrecognized-function-or-variable

评论： Image Analyst 2022-3-28

clear all 
clc
range = 1;
t = -range:0.01:range;
w = 1;
P = unit(t+w/2)-unit(t-w/2);
plot(t,P,'Linewidith',5)
grid on
axis([-range-1 range+1 0 1])
title('Rectangel Function');
xlabel('Time(sec)');
ylabel('p(t)');
line([0 0],ylim,'color','r', 'Linewidth',2)
line(xlim,[0 0],'color','r', 'Linewidth',2)

The error I get is as follows. I don't know how to fix this problem. Thank you in advance for your help.

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SALINI BALASUBARAMANIUM 2022-3-28

在 MATLAB Online 中打开

function [Abar, xbar] = ATPL(K,xcord,initiator,omega,phi,M,N,sigma)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Joint Clock Synchronization and Ranging: 
% Asymmetrical Time-stamping and Passive Listening 
%
% IEEE Signal Processing Letters, 20 (1): 51 - 54, Jan 2013
% Sundeep Prabhakar Chepuri, CAS, TU Delft.
%
% ATPL script (1 sensor and 10 anchors, or vice versa)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
ii= initiator;
speed = 3*10^8;
%observation window
ObsrvWindow = linspace(1,100,K); %1:100; % [s]
for k=1:K
    T_i(k,1) = ObsrvWindow(k);
    for jj =1:M+N
        if(jj==ii)
            R_ji(k,jj) = 0;
            continue;
        end
        R_ji(k,jj) = T_i(k,1) + (norm(xcord(:,ii)-xcord(:,jj),2))/speed;
        R_ji(k,jj) = omega(jj)*(R_ji(k,jj)+ sqrt(0.5*sigma^2)*randn(1,1)) + phi(jj);
        %R_ji(k,jj) = omega(jj)*(R_ji(k,jj)) + phi(jj);
    end
    T_i(k,1) = omega(ii)*(T_i(k,1) + sqrt(0.5*sigma^2)*randn(1,1))  + phi(ii);
%     T_i(k,1) = omega(ii)*(T_i(k,1))  + phi(ii);
end
A1 = []; A2 = []; E1 = []; E2 = [];
for jj = 1:M+N
    
    if (jj==ii)
        continue;
    elseif (jj <ii)
        A1 = blkdiag(A1,-[R_ji(:,jj) ones(K,1)]);
        
    else
        A2 = blkdiag(A2,-[R_ji(:,jj) ones(K,1)]);
    end
    
    
end
tempsizeA1 = size(A1); tempsizeA2 = size(A2);
A1 = [A1; zeros(tempsizeA2(1),tempsizeA1(2))];
A2 = [zeros(tempsizeA1(1),tempsizeA2(2));A2];
A3 = kron(ones(M+N-1,1),[T_i ones(K,1)]);
A = [A1 A3 A2];
temp_comb = nchoosek(1:M+N,2);
%tempS = [1 2]; tempA = [1 3; 2 3];
% colConstrComp = 1; 
% colConstr = 2:3;
%tauknwn = [1     2     3     4     6     7     8    10    11    13]; 
%tauunknwn = [5 9 12 14 15];
tauknwn = find(temp_comb(:,2)~=M+N).';
tauunknw = find(temp_comb(:,2)==M+N).';
E = zeros((M+N-1)*K,length(temp_comb));
flag=0;
tau_i = zeros(length(temp_comb),1);
for jj=1:size(temp_comb,1)
    tau_i(jj) = (norm(xcord(:,temp_comb(jj,1))-xcord(:,temp_comb(jj,2)),2))/speed;
end
for vertjj = 1:M+N-1
    for horjj=flag+1:length(temp_comb)
        if (temp_comb(horjj,1)==ii || temp_comb(horjj,2)==ii) %
            E ((vertjj-1)*K+1:vertjj*K,horjj) = ones(K,1);
            tau_i(horjj) = (norm(xcord(:,temp_comb(horjj,1))-xcord(:,temp_comb(horjj,2)),2))/speed;
            flag=horjj;
            break;
        end
    end
end
Abar = [A(:,1:2*(M+N-1)) E(:,tauunknw)];
xbar = -A(:,2*(M+N-1)+1:end)*[1;0]- E(:,tauknwn)*tau_i(tauknwn);
% Abar = [A(:,1:2*(M+N-1)) E];
% xbar = -A(:,2*(M+N-1)+1:end)*[1;0];
Oaux = ones(M+N-1,1)*ones(M+N-1,1)';
Rmat = 0.5*sigma^2*kron(Oaux, eye(K)) + 0.5*sigma^2*eye((M+N-1)*K);
[V,D] = eig(Rmat);
W = sqrt(inv(D))*V.';
Abar = W*Abar;                                                         
xbar = W*xbar;                                                         

Image Analyst 2022-3-28

@SALINI BALASUBARAMANIUM , not sure how your code fixes the "Unrecognized function or variable" error that was mentioned in this year-old question where the user was tring to implement the Heaviside step function. Did you post it here by mistake?

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