Pkg.add("Plots")报错求解决方法！-技术交流区-MoHub

报错求教

using Plots
using FFTW
τ = 2.0  
t_max = 20.0  
N = 1024  
t = range(-t_max, t_max, length=N)
x_t = [abs(ti) < τ ? 1.0 : 0.0 for ti in t]  
X_f = fftshift(fft(x_t)) / N  
frequencies = range(-0.5, 0.5, length=N) * N / (2 * t_max)  
magnitude_spectrum = abs.(X_f)
phase_spectrum = angle.(X_f)
plot(t, x_t, xlabel="时间", ylabel="x(t)", title="Time Domain Waveform", legend=false)

报错：
ArgumentError: Package Plots not found in current path.

Run import Pkg; Pkg.add("Plots") to install the Plots package.
Stacktrace:
[1] macro expansion

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