I have a 3-dimensional matrix like this[image] . I want to get its mean of the third dimension, i.e. the average of 1000 two-dimensions. But it shows fault like this [image] Did I use the mean wrong?

I can’t reproduce your problem. If I make a 3d array with sol = rand(2,4412,1000), then mean(sol, dim=2) gives a MethodError because the keyword is spelled dims, not dim. If I use the correct spelling, it works fine: julia> using Statistics julia> sol = rand(2,4412,1000); julia> mean(sol, dims…

General comments: Don’t post screenshots, post quoted code . Post a complete reproducible example, like the code I posted. See Please read: make it easier to help you

Yes I’m using the mean in the Statistics Library. I changed the “dim” to “dims” and the result still like this… [image]

# using Pkg # Pkg.add("DifferentialEquations") # Pkg.add("StochasticDelayDiffEq") using DifferentialEquations, StochasticDelayDiffEq, Plots, Statistics function f(du, u, h, p, t) M_A, M_B = u; tau, mu, n, P0, b, sigma_A, sigma_B = p; hist_A = h(p, t-tau)[1]; hist_B = h(p, t-tau)[2]…

typeof(sol) is an EmsembleSolution. I wanted to plot the average trajectory. I should use EnsembleSummary(sol) to get its average trajectories then plot(…, :).

[image] Liwei17: I wanted to plot the average trajectory. See How to sum outputs from DifferentialEquations.jl

The mean of 3-d EmsembleSolution from StochasticDelayDiffEq

New to Julia

stevengj August 29, 2021, 9:23pm 8

See How to sum outputs from DifferentialEquations.jl

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The mean of 3-d EmsembleSolution from StochasticDelayDiffEq

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