??? Error using ==> mpower Matrix must be square.

Question

0 个投票

hello everybody, I'm triying to create a graphic, but when I run the program, it gives me an error:

??? Error using ==> mpower Matrix must be square. Error in ==> ssssssssss at 5 y=1/sqrt((1-(x^2))^2+(2*xi*x)^2);

this is my code:

    % code
clc;
xi=0;
x=0:0.01:5;
y=1/sqrt((1-(x^2))^2+(2*xi*x)^2);
plot(x,y)

Instead of using plot, I've tried SEMILOGY and LOGLOG but the message is the same.

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Answer 1

James Tursa 2017-10-7

0 个投票

You need to use the element-wise operators that have a dot in front of them instead of the matrix operators. So use this instead:

y = 1 ./ sqrt((1-(x.^2)).^2 + (2*xi*x).^2);

Mariela Flores 2017-10-7

Oh! you are right! THANK YOU SO MUCH!!

Answer 2

aref mero 2017-10-8

0 个投票

for SP=1:20 E1=Q*F1; bug=bug+E1; % bug=bug+E1 end bug=0; for SP=1:20 E2=Q*F2; bug=bug+E2; % bug=bug+E2 end E=sqrt(E1^2+E2^2)