What is the meaning of the symbol (') at the end of linspace?

Hello everyone,

I just started learning MATLAB. I was reading the documentation to plot discrete sequences: https://au.mathworks.com/help/matlab/ref/stem.html

I tried these lines of code online:

figure
X = linspace(0,2*pi,50)';
Y = [cos(X), 0.5*sin(X)];
stem(X,Y)

What is the meaning of the symbol (') in the linspace command before (;)? I can't find documentation about it. I noticed that if I remove it I get the error: X must be same length as Y.

Any help will be appreciate it. Thanks.

Answer 1

[Juan Carlos Ponce Campuzano]

I just figured it out.

This is a row vector:

linspace(0, 2*pi, 50);

This is a colum vector:

linspace(0, 2*pi, 50)';

:)

[Steven Lord]

That is correct. It is the conjugate transpose operator. If your data may be complex you should use the transpose operator .' if you don't want to take the conjugate.

x = (1:5)+(6:10)*1i % positive imaginary parts

x = 
   1.0000 + 6.0000i   2.0000 + 7.0000i   3.0000 + 8.0000i   4.0000 + 9.0000i   5.0000 +10.0000i

yConjugate = x' % negative imaginary parts

yConjugate = 
   1.0000 - 6.0000i
   2.0000 - 7.0000i
   3.0000 - 8.0000i
   4.0000 - 9.0000i
   5.0000 -10.0000i

yNonconjugate = x.' % positive imaginary parts

yNonconjugate = 
   1.0000 + 6.0000i
   2.0000 + 7.0000i
   3.0000 + 8.0000i
   4.0000 + 9.0000i
   5.0000 +10.0000i

[Juan Carlos Ponce Campuzano]

Thank you so much. That makes it clearer. :)