E.1.11. - Getting and setting data points
In order to transfer information about a data point between your code
and the overhead modules with type 4 user functions, these built-in
routines are available
| Name |
What it Does |
 |
|
|
pt_get(p, i) |
Fetches data point i into Point whose address is p |
pt_set(p, i) |
Sets data point i from Point whose address is p |
|
The following code fragment sets the
x
and
y
values
for 100 points.
The error-bar value and line-control state only need
to be set once since the same storage for the
Point is reused
each time.
{
Point pt; /* Declare storage */
set_s(&pt, 0); /* Error bar = 0 */
set_down_pen(&pt); /* Set pen down */
for (i=0; i<100; i++) {
set_x(&pt, i); /* x = i */
set_y(&pt, i*i); /* y = i * i */
pt_set(&pt, i); /* Set values */
}
set_npts(i); /* Set number of points */
new_points(); /* New ranges */
}
|
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