sumabs2!

sumabs2!(r, A)

Sum squared absolute values of elements of A over the singleton dimensions of r, and write results to r.

Examples

Calculate sum of squared absolute values for a vector:
```
julia> r = zeros(3);
julia> A = [1, -2, 3];
julia> sumabs2!(r, A)
3-element Array{Float64,1}:
14.0
0.0
0.0
```
This example calculates the sum of squared absolute values of the elements in vector A and stores the results in vector r.
Calculate sum of squared absolute values for a matrix along rows:
```
julia> r = zeros(2);
julia> A = [1 2 3; -4 -5 -6];
julia> sumabs2!(r, A)
2-element Array{Float64,1}:
14.0
77.0
```
It calculates the sum of squared absolute values of the elements in matrix A along each row and stores the results in vector r.
Calculate sum of squared absolute values for a tensor along specified dimensions:
```
julia> r = zeros(2);
julia> A = [1 2 3; -4 -5 -6; 7 8 9];
julia> sumabs2!(r, A, dims=(1, 2))
2-element Array{Float64,1}:
285.0
0.0
```
It calculates the sum of squared absolute values of the elements in tensor A along dimensions 1 and 2 and stores the results in vector r.

Common mistake example:

julia> r = [10, 20, 30];
julia> A = [1, -2, 3];
julia> sumabs2!(r, A)
ERROR: MethodError: no method matching sumabs2!(::Array{Int64,1}, ::Array{Int64,1})

In this example, the input arrays r and A have different element types (Int64 and Float64). Ensure that the types of the arrays match to avoid such errors.

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sumabs2!

Examples

See Also

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