What is this power function doing?

Question

Peter Piper 2015-9-25

0
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https://ww2.mathworks.cn/matlabcentral/answers/245044-what-is-this-power-function-doing

编辑： Walter Roberson 2015-9-25

I was wondering if someone could explain to me what the function power was actually doing. I know that power is tied to mlmif.h

return power(10,PD/10); PD is an mwArray.

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Peter Piper 2015-9-25

编辑：Walter Roberson 2015-9-25

在 MATLAB Online 中打开

Yes, this is c++ and this is the power function if that helps

inline mwArray power(const mwArray &in1=mwArray::DIN, const mwArray &in2=mwArray::DIN)
{
  int nrhs = 0;
  int nlhs = 1;
  MatlabMatrix *plhs[1];
  plhs[0] = NULL;
  MatlabMatrix *prhs[2];
  if (!in1.IsDIN()) {
    prhs[nrhs++] = in1.GetData();
    if (!in2.IsDIN()) {
      prhs[nrhs++] = in2.GetData();
    }
  }
  mlxPower(nlhs, plhs, nrhs, prhs);
  return plhs[0];
}

I am not sure what mlxPower is doing either however know that it takes...

extern void mlxPower(int nlhs, mxArray *plhs[], int nrhs, mxArray *prhs[]);

which is in the libmatlbm.h

Adam 2015-9-25

Can you not work it out from the results given the assumption that the most likely thing it is doing is what myself and Thorsten have suggested. You can easily calculate this in Matlab and compare.

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