Matlab coder and exponentiation

I'm sure there is a way to get matlab coder to do A = B ^ C where all A, B and C are scalers, but for the life of me, I'm just not seeing it.

Every way I try and express it ends up with the error "Matrix power is not supported for code generation."

A = B(1) .^ C(1) isn't getting me where I want to go.

I can do it in C. I can do it in Matlab, I just can't get Matlab to do it in C.

[Konstantinos Sofos]

A,B and C are matrices or scalars...i cannot understand the "scalers" that you wrote?

[Rick Rosson]

Konstantinos, don't you think it's just a typo?

Answer 1

[Ryan Livingston]

This sounds like an installation issue. Can you check to see that the files:

fullfile(matlabroot,'toolbox','eml','lib','matlab','ops','mpower.m')
fullfile(matlabroot,'toolbox','eml','lib','matlab','ops','power.m')

exist in your MATLAB installation? Likely they do not as ^ should be supported for code generation.

If they are not present, reinstalling would be advised. Customer support should be able to help you get going again if the install doesn't seem to be successful.

If the files are present, try to run

restoredefaultpath
rehash toolboxcache

and see if codegen succeeds.

[David Short]

On a different machine a test case works with 2014b. Same test case is not working on my original machine with 2014a.

Either version or installation. Comment on this Answer David Short

Answer 2

[James Tursa]

Have you tried A = exp( C * log(B) ) ?

[David Short]

As a work around this works. Thank you. I'm still interested in pursuing what the underlying cause is with not being able to use mpower from matlabcoder.

Thanks James!