# Function Draw3dmatrix - HP 48gII User Manual

Graphing calculator.

The output is in a graphical format, showing the original function, F(X), the
derivative F'(X) right after derivation and after simplification, and finally a
table of variation. The table consists of two rows, labeled in the right-hand
side. Thus, the top row represents values of X and the second row represents
values of F. The question marks indicates uncertainty or non-definition. For
example, for X<0, LN(X) is not defined, thus the X lines shows a question mark
in that interval. Right at zero (0+0) F is infinite, for X = e, F = 1/e. F
increases before reaching this value, as indicated by the upward arrow, and
decreases after this value (X=e) becoming slightly larger than zero (+:0) as X
goes to infinity. A plot of the graph is shown below to illustrate these
observations:

## Function DRAW3DMATRIX

This function takes as argument a n×m matrix, Z, = [ z
], and minimum and
ij
maximum values for the plot. You want to select the values of v
and v
so
min
max
that they contain the values listed in Z. The general call to the function is,
therefore, DRAW3DMATRIX(Z,v
,v
). To illustrate the use of this function
min
max
we first generate a 6×5 matrix using RANM({6,5}), and then call function
DRAW3DMATRIX, as shown below:
The plot is in the style of a FAST3DPLOT. Different views of the plot are shown
below:
Page 12-54  