a=-w**2;
a=x`[1,2];
The first statement is equivalent to
a = -w*w;
which is matrix multiplication.
The second statement is equivalent to
a = x[2,1];
because transpose means flip the matrix across the main diagonal.
It sounds like you have some very basic questions about the SAS/IML language. You might want to look at these resources to help you get started with the language: "Ten tips for learning the SAS/IML language."
IML Operators
http://support.sas.com/rnd/app/iml/matrix.html
Base SAS operators
http://support.sas.com/documentation/cdl/en/lrcon/62955/HTML/default/viewer.htm#a000780367.htm
** is Exponentiation
` is transpose for a matrix
The first statement is equivalent to
a = -w*w;
which is matrix multiplication.
The second statement is equivalent to
a = x[2,1];
because transpose means flip the matrix across the main diagonal.
It sounds like you have some very basic questions about the SAS/IML language. You might want to look at these resources to help you get started with the language: "Ten tips for learning the SAS/IML language."
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