# Replacing all array elements with a single value

I am new to the Julia Language and like what I have seen so far. However, I have few questions. Here is one of them.

In Matlab, I can create an array of zeros
Example: ub=zeros(1,nz);
and replace all elements with a new value
Example: ub( = -10
When I try
Example: ub[1,:] = -10; or ub[:] = -10;
I get the following error
ERROR: MethodError: no method matching setindex_shape_check(::Int64, ::Int64, ::Int64)

Can anyone help? Thanks!

In Julia, broadcast is not assumed nor inferred,

``````julia> a = rand(10)
10-element Array{Float64,1}:
0.46400630682359223
0.1957753520911425
0.07286946443379883
0.8514324789137262
0.2822527883717596
0.8221625781175499
0.3247131615790402
0.37229777035307743
0.8315187849494032
0.9406639580035234

julia> a .= 1; a
10-element Array{Float64,1}:
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
``````
2 Likes

Thank you!

One more question…what about a 2-D array? The same approach above didn’t work for it…

MATLAB: um(:, = -10;

Thanks!
How do I quote code?

you quote code adding backticks `` ( `one backtick for inline code`) and three backticks for this:

``````your code surrounded by three backticks
``````
2 Likes

Matlab example `um(:,:) = -10;`

`um[:,:] .= -10;`
``````f(x) = 2x + sin(x) #single variable to single variable