Convert matlab function EXPM to SAS code

[di_niu0]

Hi there. I am converting some Matlab code to SAS code. In Matlab, there is a built-in function that calculates the matrix exponential of a matrix called EXPM. There is no such built-in function for PROC IML. Does anyone know how to write the SAS code to produce the same result as EXPM? Thank you! 

[data_null__]

I think you need IML EXP function.

proc iml;
   /* Define the matrix A */
   A = {0 1, -1 0};

   /* Compute the matrix exponential */
   expA = exp(A);

   /* Print the result */
   print expA;
quit;

[Ksharp · Accepted solution]

https://blogs.sas.com/content/iml/2023/05/03/geometry-exponential-of-matrix.html

[Rick_SAS]

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@di_niu0 wrote:

Hi there. I am converting some Matlab code to SAS code. In Matlab, there is a built-in function that calculates the matrix exponential of a matrix called EXPM. There is no such built-in function for PROC IML. Does anyone know how to write the SAS code to produce the same result as EXPM? Thank you! 

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I think you are mistaken. The SAS IML language has supported the EXPMATRIX function, which computes the exponential of a matrix, for 20+ years.