What does this error mean? That an object somewhere in the code is specified as Vector{Float64} and Julia cannot convert it to Float64? I thought it didn’t matter so long as the type was matched (i.e. both Float64).

A common cause is setindex!: julia> x = rand(3); julia> x[1] = [1.0]; ERROR: MethodError: Cannot `convert` an object of type Vector{Float64} to an object of type Float64

Hi everybody, I have a similar question to the extent that when I use setindex! Julia raises the same error My script: [JuliaIssue]

The error message : [JuliaIssue] Do you have any clue ? Tanks in advance !

Probably best to start a separate thread about your issue. That said, your error is relatively clear I would have thought - you’re trying to set a value of yhat, but you’re passing a vector, which is what [1 1]*xhat returns, as xhat is a two-element vector: julia> [1 1]*rand(2) 1-element Vector{Flo…

@nilshg thank you very much for your quick answer I got your point, however what would be the general case ? Like in the photo below ? [Capture]

what general case? are you look for element wise set index? .= ? please stop sending screenshots and try to send MWE (minimal working example) snippet in the future

What I mean by general case is to set a value of an element of a matrix with a dot product (here [m1 m2] and xhat)

the dot product will be calculated first. it should give you a scalar, you can set an element of a matrix to a scalar regardless how you got that scalar.

In Julia a dot product is computed by dot(x,y) or x ⋅ y, not x' * y like in Matlab. E.g. julia> using LinearAlgebra julia> dot([1 ; 2], [3; 4]) 11 julia> [1 ; 2] ⋅ [3; 4] 11 julia> A = zeros(2,2) 2×2 Matrix{Float64}: 0.0 0.0 0.0 0.0 julia> A[1,1] = [1 ; 2] ⋅ [3; 4] 11 Do read this document…

Thank you all for your help! I’ll check your documentation!

MethodError: Cannot `convert` an object of type Vector{Float64} to an object of type Float64

General Usage

Beboleto December 11, 2021, 3:56pm 5

The error message :

Do you have any clue ?

Tanks in advance !

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MethodError: Cannot `convert` an object of type Vector{Float64} to an object of type Float64

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