MATLAB: I get the error Index in position 2 exceeds array bounds (must not exceed 1).

exceeds array bounds

V = X(;,2)*0.028

File attached is X

Best Answer

Try this

X = readmatrix('FinalProj_TVdata.csv');
V = X(:,2)*0.028;

Or this if you are using R2018b or earlier.

X = readtable('FinalProj_TVdata.csv');
V = X{:,2}*0.028;

Related Solutions

MATLAB: Index in position 1 exceeds array bounds (must not exceed 1).

You created a row vector named text instead of text being the name of a MATLAB plotting call.

... and then you access that row vector as if it were a 3D array, which is why you get the indexing error.

MATLAB: Index in position 1 exceeds array bounds (must not exceed 1).

Hello,

There are several approaches that you can try to eleminate the point inside the circle. Here, I can show you a solution

T=100;
m=10;
A=10;
B=10;
R=30;
th=0:pi/100:2*pi;
X=R*cos(th)+A;
Y=R*sin(th)+B;
x = zeros(1,m);
y = zeros(1,m);
DX=20;
for j=1:m  %Number of particle
    for i=1:T   %Number of steps
        xnext = x(i,j)+DX*randn();
        ynext = y(i,j)+DX*randn();
        cond =  norm([xnext-A,ynext-B]);
        while (cond < R)
            xnext = x(i,j)+DX*randn();
            ynext = y(i,j)+DX*randn();
            cond =  norm([xnext-A,ynext-B]);    
        end
        x(i+1,j)=xnext;
        y(i+1,j)=ynext;
    end
end
plot(x(2:end,:),y(2:end,:),'k.');
hold on;
plot(X,Y,'r');
title (['Time = ', num2str(T),', Particles = ', num2str(m)]);
xlabel("space x");
ylabel("space y");
hold off;

Now, you will get rid of the previous error.

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MATLAB: Index in position 1 exceeds array bounds (must not exceed 1).

MATLAB: Index in position 1 exceeds array bounds (must not exceed 1).

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