Why do I get wrong results with power of 2?

I want to power a scalar with a matrix-values, which seems to be 2. As a result I get -2,53.

For example: my scalar = 1.61803 one of the matrixvalues = 2 result = -2.53

But if the matrix value = 3 the result is correct with 4.24

The matrix values were beeing created by following formula:

x = log10(factor)/log10(1.61)

Whats wrong with the 2? Maybe it's a problem of floating point numbers?

kind regards Reinhard

Answer 1

[Thorsten]

Use .^

   M = [1 2; 3 4];  1.61803.^M

[Reinhard Palaver]

Hi Thorsten!

I've also used .^! But this is not the solution. In the meantime I've found the answer. The problem is the floating point number after computing the x. I changed the basic formula to

x = real(log10(factor)/log10(1.61))

so it works. But thanks for answering!