2d plot for imaginary

Sorry for the trouble.I have a question to ask.Below is the code that i have written:

x4 = 0:pi/30:2*pi; % x vector, 0 <= x <= 2*pi, increments of pi/30

x4a=(137.*267.^(1/2).*111819872067690549716262153787.^(1/2).*1i.*(71289 - 2500.*x4^2).^(1/2))./785298692348313600 - (748846716930964699.*x4)./15705973846966272;

y4a=-sqrt(5.34^2-x4a^2);

plot(x4,x4a)

The problem is whenever i simulate it,they are saying Error using ==> mpower Inputs must be a scalar and a square matrix.

I have already put the . and even the imaginary part i have put 1i.What is wrong with it?

Thank you.

Answer 1

[the cyclist]

As you seem to have remembered in some places, but not others, you need ".^" to do element-wise raising to a power. Correcting this error in two places gives:

 x4 = 0:pi/30:2*pi; % x vector, 0 <= x <= 2*pi, increments of pi/30
 x4a=(137.*267.^(1/2).*111819872067690549716262153787.^(1/2).*1i.*(71289 - 2500.*x4.^2).^(1/2))./785298692348313600 - (748846716930964699.*x4)./15705973846966272;
 y4a=-sqrt(5.34^2-x4a.^2);
 plot(x4,x4a)

That code runs, but gives a warning about ignoring imaginary parts of your complex input. Maybe you can sort that out yourself?

[Gun]

Thank you!