UInt32 array to Double array Swift

Question

I need to multiply 2 matrices in swift, so in order to use accelerate I need 2 arrays with type double. The issue is, the two arrays that I need to multiply are type UInt32. Is there anyway to convert a UInt32 array to a double array?

var UInt32TestArray: [UInt32] = [1,4,2,3]
var Int32TestArray: [Double] = [Double](UInt32) //Doesn't work

Suggest not capitalizing variables names - they look like type names. And, naming a `[Double]` type as `Int32TestArray` is confusing. Just style suggestions. Cheers. — GoZoner, Jul 20 '16 at 15:59

score 19 · Accepted Answer · answered Jul 20 '16 at 15:57

19

Use

UInt32TestArray.map { Double($0) }

to get an array of Double.

answered Jul 20 '16 at 15:57

GoZoner

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score 0 · Answer 2 · edited May 23 '17 at 11:52

0

I don't think you can use a cast for these types of things. Usually you use a map function for converting an array of one type to another. An answer to a similar question can be found here. Conversion of entire array from int to double in order to do some aritmetic operations

edited May 23 '17 at 11:52

Community

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answered Jul 20 '16 at 15:58

Amloelxer

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score -1 · Answer 3 · answered Jul 20 '16 at 15:58

-1

Try this

var Int32TestArray = UInt32TestArray.map{UInt32(abs($0))}

answered Jul 20 '16 at 15:58

Feldur

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UInt32 array to Double array Swift

3 Answers3