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Why do I get wrong results with power of 2?

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Reinhard Palaver
Reinhard Palaver 2016-8-9
评论： Reinhard Palaver 2016-8-10
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

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回答（1 个）

Thorsten
Thorsten 2016-8-9
Use .^
M = [1 2; 3 4]; 1.61803.^M
  1 个评论
Reinhard Palaver
Reinhard Palaver 2016-8-10
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!

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