Plot with not imaginary part


#1

Hi, I need to plot a function/array that have complex number. This complex number are giving bad results to my graphic, as you can see in the image a line keep going in the corner of the Ellipsoid, this line is not welcome.

In order to fix it a need to filter the array V1a and V1b, excluding all elements that have imaginary part. I try to use V = real(V1a), but it do not work beacause it keep the element and I do not want to plot any element that used to have imaginary part.

Some have any idea how to help me?
image:

code:
using PyPlot
c = [“red”, “green”, “blue”, “black”, “gray”,“violet”, “orange”,“purple”,“yellow”, “Grey”,“Aqua”,“Black”,“BlueViolet”,“Brown”,“Coral”,“Cyan”,“Gold”,“Indigo”,“Lime”,“Magenta”,“Maroon” ];
(n,)=size©

θ1 = linspace(-70,20,1000);

αt = 70*(pi/180) # 70 graus height=“453”>(θ1*(pi/180)+ αt))+sqrt(((cos(θ1*(pi/180) + αt)).^(2.0))-(4.0cos(αt)Pd1Zt)+0im))/(2.0cos(αt))
V1b = ((+cos(θ1*(pi/180) + αt))-sqrt(((cos(θ1*(pi/180) + αt)).^(2.0))-(4.0cos(αt)Pd1Zt)+0im))/(2.0cos(αt))

plot(θ1, V1a, linewidth=2.0,color=c[2],label = “Pd1 = " *string(trunc(Pd1,2)), linestyle=”-")
plot(θ1, V1b, linewidth=2.0,color=c[2], linestyle="-")

PyPlot.xlabel(“Θ 1 (Grau)”)
PyPlot.ylabel(“V1 (p.u1))”)
PyPlot.title(“Pd1 menor que Pdmax”)
PyPlot.grid(“on”)

get the current axis argument of the plot

ax = gca()

ax[:legend](loc=“upper right”)

Thanks a lot


#2

Replace all values with an imaginary part with NaN?


#3

It works! Tks


#4

I just use a function as below
function retiraImaginario(x)
(n,) = size(x)
for i = 1:n
if (imag(x)[i]!=0.0)
x[i]= NaN
end
end
end