Swift function that takes in array giving error: '@lvalue $T24' is not identical to 'CGFloat'

Question

So I\'m writing a lowpass accelerometer function to moderate the jitters of the accelerometer. I have a CGFloat array to represent the data and i want to damp it with this funct

Answer 1

Mainly as a followup for future reference, @newacct's answer is the correct one. Since the original post showed a function that returns an array, the correct answer to this question is to tag the parameter with var:

func lowPass(var vector:[CGFloat]) -> [CGFloat] {
    let blend:CGFloat = 0.2

    // Smoothens out the data input.
    vector[0] = vector[0] * blend + lastVector[0] * (1 - blend)
    vector[1] = vector[1] * blend + lastVector[1] * (1 - blend)
    vector[2] = vector[2] * blend + lastVector[2] * (1 - blend)

    // Sets the last vector to be the current one.
    lastVector = vector

    // Returns the lowpass vector.
    return vector
}