Computes the base x logarithm of y.

(x>0, y>0). If y is 0, the output is –∞. When x and y are both non-complex and x is less than or equal to 0, or y is less than 0, the output is NaN. The connector pane displays the default data types for this polymorphic function.


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Inputs/Outputs

  • cdbl.png y —

    y can be a scalar number, array or cluster of numbers, array of clusters of numbers, and so on.

  • cdbl.png x —

    x can be a scalar number, array or cluster of numbers, array of clusters of numbers, and so on.

  • idbl.png logx(y) —

    logx(y) is the logarithm of y to the base x. When x and y are complex, the following equation defines logx(y):

    logx(y) = ln(y)/ln(x)

    Refer to the Natural Logarithm function for more information.

    • Examples

    Refer to the following example files included with LabVIEW.

    • labview\examples\Mathematics\Elementary & Special Functions\Exponential Functions\Exponential.vi