I need help with the error called 'Error using vertcat Dimensions of arrays being concatenated are not consistent.'

I have a piece of code-

position = [0.3189, 0.2189, 0.6320, 0.5320;...

0.1927, 0.0927, 0.3883, 0.2883;...

0.3180, 0.1180, 0.4174, 0.2174;...

0.5303, 0.4303, 0.5302, 0.4302;...

0.7071, 0.6071, 0.6528, 0.5528;...

0.7277, 0.6277, 0.6528, 0.5528;...

0.9107, 0.8107, 0.4419, 0.3419;...

0.9710, 0.6710, 0.4276, 0.1276;...

0.4246, 0.3246, 0.6509, 0.5509;...

0.4246, 0.3246, 0.1785, 0.0785;...

0.5771, 0.4771, 0.6556, 0.5556;]

checkpoint = [0.1; 0.2];

A = [ones(11, 2) position];

M = [diag(checkpoint)-diag(checkpoint); -eye(2) zeros(2); zeros(2) eye(2)];

find(sum(A*M > 0, 2) == 4)

when i run this code it throws error called vertcat dimensions

Howresolve this issue?

Answer 1

[David Fletcher]

The statement tries to stack a 2x2 on top of a (2x4) x 2

M = [diag(checkpoint)-diag(checkpoint); -eye(2) zeros(2); zeros(2) eye(2)];

x x

x x

x x x x

x x x x

x x x x

x x x x

for it to work the top 2x2 matrix would need to be padded to 2x4

Looking at it diag(checkpoint)-diag(checkpoint) doesn't make much sense - you'd just do zeros(2) in your schema. Maybe you meant to horizontally concatenate diag(checkpoint) with the unary negation of diag(checkpoint)

M = [diag(checkpoint) -diag(checkpoint); -eye(2) zeros(2); zeros(2) eye(2)];

[Praneeti Mitra]

thanks