Help System (web edition)

Both symbolic and numeric constants and expressions may appear in
certain MAT operations. The values of the symbolic constants must be
given in the same subfield. The symbolic constants have to be written in
lowercase letters.

For example,
m=10 n=5 x=k/100 coeff=2.5 k=3000
MAT C=CON(m,m+n,x) / 10*15 matrix with all elements =30
MAT C=coeff*C      / *C~coeff*CON 10*15
MAT C=(sqrt(k))*C  / *C~(sqrt(k))*coeff*CON 10*15

MAT DIM <matrix> 
is an auxiliary operation yielding the dimensions of a matrix in the form
MAT DIM A                     / * rowA=30 colA=5
If A is a diagonal matrix, the rank of A is also given as rankA=4.
After MAT DIM A has been executed, symbolic constants rowA, colA, (rankA)
may be used as symbolic constants in following lines of a matrix program.

An element of a matrix may be directed to a scalar by
MAT s=A(1,3)
giving the value of s on the same line in form s~1.234.
  M = More information on MAT operations